What are the cheapest airlines flying from Seattle to Toronto round-trip?

According to our current data, WestJet (C$ 236), Air Canada (C$ 420), and Alaska Airlines (C$ 456) offers the cheapest pricing from Seattle to Toronto. You may be able to fly from Seattle to Toronto for 60% less than the average price by searching for these airlines.

What are the cheapest airlines to fly from Seattle to Toronto one-way?

For one-way options, check prices for WestJet. According to our data, you can fly for as low as C$ 94. Users have also found prices from C$ 207 and C$ 209 on Delta and Alaska Airlines, respectively.

What is the cheapest day to fly from Seattle to Toronto?

Travelers seeking maximum savings on their Seattle to Toronto flight should consider departing on Thursday evenings when fares are most often at their lowest. Wednesday evenings flights should be avoided if possible as fares are typically the most expensive at this time.

What are the most popular routes from Seattle to Toronto?

Most travellers choose Seattle/Tacoma Intl - Toronto Pearson Intl, Seattle/Tacoma Intl - Toronto Island or Seattle/Tacoma Intl - Hamilton when deciding on the best route from Seattle to Toronto.

What are the cheapest flights from Seattle to Toronto?

On average you can expect to pay C$ 491 for a flight from Seattle to Toronto. The cheapest flight overall is C$ 222 while the most popular route, (Seattle/Tacoma Intl - Toronto Pearson Intl) is currently priced at C$ 290.

What are the most reliable airlines from Seattle to Toronto?

Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from Seattle to Toronto on time: Brussels Airlines (100%), Air Tahiti Nui (95%), Alaska Airlines (90%).

What are the most popular airlines that fly from Seattle to Toronto?

The most popular airlines flying from Seattle to Toronto are Air Canada, Alaska Airlines and WestJet. Something to consider prior to booking your flight.

What is the cheapest day to fly round-trip from Seattle to Toronto?

Users have found that flying from Seattle to Toronto on a Monday typically leans towards higher prices. However, this doesn’t mean you still can’t find a deal. Flexibility with other aspects of your flight can still land a great price for your trip.

How far in advance should I book a flight from Seattle to Toronto?

To save up to 119% on this flight, we recommend booking at least 28 days prior to travel. The price may fluctuate and will likely increase closer to your departure date. Users on Cheapflights have found tickets from Seattle to Toronto from C$ 634 1-2 weeks out and tickets from C$ 973 for flights departing within the next 72 hours.

What is the cheapest month to fly from Seattle to Toronto?

Due to multiple factors, expect to potentially pay more when booking in June. For low rates, January can be a great choice for travel to Toronto. Flights to Toronto from Seattle in January are about C$ 595 on average during January, but can be found for as low as C$ 177.

What airport do you fly from for flights from Seattle to Toronto?

Seattle/Tacoma Intl (SEA), located 18.4 km from the city centre, is the airport you fly out of when you book flights from Seattle to Toronto. 3 airlines have flights from Seattle/Tacoma Intl to Toronto on a regular basis. Booking flights from Seattle/Tacoma Intl to Toronto should not be difficult; the airport handles an average of 5 outbound flights to Toronto per day.

Can I find deals for flights from Seattle to Toronto that include hotel bookings?

Yes. In addition to deals on Seattle to Toronto flights, Cheapflights offers vacation packages that include both flights and hotel.

How can I find direct flights from Seattle to Toronto?

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Seattle to Toronto.

Can I find deals for business class flights from Seattle to Toronto?

Yes. Cheapflights offers flight deals from Seattle to Toronto by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

C$ 94+ Flights from Seattle to Toronto

Cheapflights Tip: The best prices from Seattle/Tacoma Intl to Toronto are usually found in January or February, booked 69 days in advance, depart on a Thursday or Sunday and return on a Thursday

Cheap flight deals from Seattle to Toronto

Round-trip from	C$ 236
One-way from	C$ 94
Popular in	June
Cheapest in	January
Average price	C$ 617
Good round-trip deal	C$ 500 or less
Good one-way deal	C$ 222 or less

WestJet
14/8-18/8
2 total stops
17h 49m total
Seattle to Toronto

Search Deals

WestJet
30/5
1 total stop
7h 51m total
Seattle to Toronto

Search Deals

Highest demand for flights based on searches. 14% potential increase in price (C$ 141 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 1% potential price decrease (C$ 15 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in April 2025

Search Deals

Price to beat on a round-trip flight from Seattle/Tacoma Intl to Toronto (YTO).

Search Deals

Price to beat on a one-way flight from Seattle/Tacoma Intl to Toronto (YTO).

Search Deals

Find flight deals from Seattle to Toronto

Cheapest flights from Seattle to Toronto
Explore the most affordable flight options available from Seattle to Toronto. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 17 April 2025.

Thu 14/81:50 p.m.SEA - YHM

1 stop7h 51mWestJet

Mon 18/86:00 a.m.YHM - SEA

1 stop9h 58mWestJet

Deal found 16/4C$ 236

Fri 2/58:56 p.m.SEA - YHM

2 stops24h 45mMultiple Airlines

Sun 11/56:00 a.m.YHM - SEA

1 stop9h 58mMultiple Airlines

Deal found 17/4C$ 315

Tue 26/82:05 p.m.SEA - YYZ

1 stop7h 19mWestJet

Thu 28/89:00 a.m.YYZ - SEA

2 stops12h 38mWestJet

Deal found 17/4C$ 376

Mon 12/56:00 a.m.SEA - YYZ

3 stops20h 51mMultiple Airlines

Tue 20/58:35 p.m.YYZ - SEA

1 stop30h 35mMultiple Airlines

Deal found 16/4C$ 377

Tue 27/57:05 a.m.SEA - YKF

1 stop14h 41mMultiple Airlines

Thu 29/56:00 a.m.YKF - SEA

3 stops35h 25mMultiple Airlines

Deal found 17/4C$ 377

Tue 17/67:05 a.m.SEA - YKF

1 stop14h 41mWestJet

Sat 12/76:00 a.m.YKF - SEA

2 stops33h 31mWestJet

Deal found 17/4C$ 394

Sun 11/57:20 a.m.SEA - YTZ

1 stop9h 30mAir Canada

Mon 12/512:25 p.m.YTZ - SEA

1 stop10h 12mAir Canada

Deal found 16/4C$ 420

Sun 11/57:20 a.m.SEA - YTZ

1 stop9h 30mMultiple Airlines

Mon 12/55:25 p.m.YTZ - SEA

2 stops33h 45mMultiple Airlines

Deal found 17/4C$ 423

Sun 1/611:40 a.m.SEA - YYZ

Nonstop4h 57mAir Canada

Sun 8/68:30 a.m.YYZ - SEA

Nonstop5h 21mAir Canada

Deal found 17/4C$ 449

Thu 8/57:15 a.m.SEA - YYZ

Nonstop4h 45mAlaska Airlines

Sat 24/54:45 p.m.YYZ - SEA

Nonstop5h 19mAlaska Airlines

Deal found 16/4C$ 456

Thu 8/511:50 p.m.SEA - YYZ

1 stop8h 50mDelta

Sat 24/511:30 a.m.YYZ - SEA

1 stop10h 17mDelta

Deal found 16/4C$ 489

Sat 14/611:24 p.m.SEA - YYZ

1 stop9h 20mUnited Airlines

Sun 22/68:30 a.m.YYZ - SEA

Nonstop5h 21mUnited Airlines

Deal found 16/4C$ 502

Best flights from Seattle to Toronto
Discover carefully curated flight deals from Seattle to Toronto that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated 17 April 2025.

Thu 14/81:50 p.m.SEA - YHM

1 stop7h 51mWestJet

Mon 18/86:00 a.m.YHM - SEA

1 stop9h 58mWestJet

Deal found 16/4C$ 236

Fri 2/58:56 p.m.SEA - YHM

2 stops24h 45mMultiple Airlines

Sun 11/56:00 a.m.YHM - SEA

1 stop9h 58mMultiple Airlines

Deal found 17/4C$ 315

Sun 11/57:20 a.m.SEA - YTZ

1 stop9h 30mAir Canada

Mon 12/512:25 p.m.YTZ - SEA

1 stop10h 12mAir Canada

Deal found 16/4C$ 420

Thu 8/57:15 a.m.SEA - YYZ

Nonstop4h 45mAlaska Airlines

Sat 24/54:45 p.m.YYZ - SEA

Nonstop5h 19mAlaska Airlines

Deal found 16/4C$ 456

Thu 8/511:50 p.m.SEA - YYZ

1 stop8h 50mDelta

Sat 24/511:30 a.m.YYZ - SEA

1 stop10h 17mDelta

Deal found 16/4C$ 489

Sat 14/611:24 p.m.SEA - YYZ

1 stop9h 20mUnited Airlines

Sun 22/68:30 a.m.YYZ - SEA

Nonstop5h 21mUnited Airlines

Deal found 16/4C$ 502

Thu 8/55:45 p.m.SEA - YYZ

2 stops13h 40mBritish Airways

Wed 14/56:30 a.m.YYZ - SEA

2 stops13h 35mBritish Airways

Deal found 17/4C$ 548

Thu 29/51:10 a.m.SEA - YYZ

1 stop8h 20mAmerican Airlines

Mon 2/61:15 p.m.YYZ - SEA

1 stop12h 54mAmerican Airlines

Deal found 16/4C$ 603

Tue 26/82:05 p.m.SEA - YYZ

1 stop7h 19mWestJet

Thu 28/89:00 a.m.YYZ - SEA

2 stops12h 38mWestJet

Deal found 17/4C$ 376

Mon 12/56:00 a.m.SEA - YYZ

3 stops20h 51mMultiple Airlines

Tue 20/58:35 p.m.YYZ - SEA

1 stop30h 35mMultiple Airlines

Deal found 16/4C$ 377

Tue 27/57:05 a.m.SEA - YKF

1 stop14h 41mMultiple Airlines

Thu 29/56:00 a.m.YKF - SEA

3 stops35h 25mMultiple Airlines

Deal found 17/4C$ 377

Tue 17/67:05 a.m.SEA - YKF

1 stop14h 41mWestJet

Sat 12/76:00 a.m.YKF - SEA

2 stops33h 31mWestJet

Deal found 17/4C$ 394

Direct flights from Seattle to Toronto
Explore direct flight options from Seattle to Toronto based on user searches, and compare prices and availability for your desired travel dates. Data last updated 17 April 2025.

Sun 1/611:40 a.m.SEA - YYZ

Nonstop4h 57mAir Canada

Sun 8/68:30 a.m.YYZ - SEA

Nonstop5h 21mAir Canada

Deal found 17/4C$ 419

Tue 6/57:15 a.m.SEA - YYZ

Nonstop4h 45mAlaska Airlines

Wed 21/54:45 p.m.YYZ - SEA

Nonstop5h 19mAlaska Airlines

Deal found 15/4C$ 426

Tue 16/912:20 p.m.SEA - YYZ

Nonstop4h 44mMultiple Airlines

Sat 20/98:55 a.m.YYZ - SEA

Nonstop5h 19mMultiple Airlines

Deal found 16/4C$ 488

Tue 1/712:10 p.m.SEA - YYZ

Nonstop4h 42mUnited Airlines

Tue 8/78:50 a.m.YYZ - SEA

Nonstop5h 20mUnited Airlines

Deal found 17/4C$ 516

Last-minute flights from Seattle to Toronto
Discover last-minute flight deals from Seattle to Toronto. Data last updated 17 April 2025 and is based on user searches.

Wed 23/43:15 p.m.SEA - YKF

1 stop7h 01mWestJet

Wed 30/46:00 a.m.YKF - SEA

1 stop9h 58mWestJet

Deal found 15/4C$ 682

Thu 24/412:45 a.m.SEA - YYZ

1 stop8h 14mDelta

Wed 7/56:30 a.m.YYZ - SEA

1 stop10h 51mDelta

Deal found 16/4C$ 541

Thu 24/42:18 p.m.SEA - YYZ

1 stop6h 40mMultiple Airlines

Thu 1/512:00 p.m.YYZ - SEA

1 stop10h 37mMultiple Airlines

Deal found 15/4C$ 555

Thu 24/41:35 p.m.SEA - YYZ

1 stop6h 50mAmerican Airlines

Sun 4/53:14 p.m.YYZ - SEA

1 stop10h 55mAmerican Airlines

Deal found 16/4C$ 674

Thu 24/49:25 a.m.SEA - YYZ

1 stop9h 05mWestJet

Tue 29/410:20 p.m.YYZ - SEA

2 stops17h 38mWestJet

Deal found 16/4C$ 775

Thu 24/45:51 p.m.SEA - YKF

2 stops32h 39mMultiple Airlines

Mon 28/46:00 a.m.YKF - SEA

1 stop17h 28mMultiple Airlines

Deal found 16/4C$ 1,000

Fri 25/47:15 a.m.SEA - YYZ

Nonstop4h 45mAlaska Airlines

Wed 7/54:45 p.m.YYZ - SEA

Nonstop5h 14mAlaska Airlines

Deal found 16/4C$ 506

Fri 25/46:35 a.m.SEA - YTZ

1 stop9h 25mMultiple Airlines

Wed 7/57:30 p.m.YTZ - SEA

1 stop17h 31mMultiple Airlines

Deal found 16/4C$ 860

Sat 26/45:15 a.m.SEA - YYZ

1 stop9h 40mUnited Airlines

Tue 6/58:25 a.m.YYZ - SEA

Nonstop5h 20mUnited Airlines

Deal found 16/4C$ 545

Sat 26/410:25 a.m.SEA - YYZ

2 stops10h 47mAir Canada

Wed 7/57:30 a.m.YYZ - SEA

1 stop9h 43mAir Canada

Deal found 16/4C$ 552

Sun 27/42:05 p.m.SEA - YHM

1 stop7h 36mWestJet

Wed 7/56:00 a.m.YHM - SEA

1 stop9h 58mWestJet

Deal found 16/4C$ 1,000

Mon 28/47:05 a.m.SEA - YKF

1 stop14h 41mWestJet

Wed 7/56:00 a.m.YKF - SEA

1 stop9h 58mWestJet

Deal found 16/4C$ 395

One-way flights from Seattle to Toronto
Search for one-way flight options from Seattle to Toronto. Find affordable one-way fares based on user searches. Data last updated 17 April 2025.

Fri 30/51:50 p.m.SEA - YHM

1 stop7h 51mWestJet

Deal found 17/4C$ 94

Tue 13/56:00 a.m.SEA - YHM

2 stops15h 41mMultiple Airlines

Deal found 17/4C$ 130

Tue 20/59:45 p.m.SEA - YYZ

1 stop10h 35mDelta

Deal found 16/4C$ 207

Wed 23/71:50 p.m.SEA - YYZ

2 stops13h 01mWestJet

Deal found 17/4C$ 208

Sat 3/57:15 a.m.SEA - YYZ

Nonstop4h 45mAlaska Airlines

Deal found 16/4C$ 209

Sun 4/59:42 p.m.SEA - YYZ

2 stops29h 53mMultiple Airlines

Deal found 16/4C$ 219

Tue 6/57:20 a.m.SEA - YTZ

1 stop9h 30mAir Canada

Deal found 16/4C$ 220

Tue 29/412:30 p.m.SEA - YTZ

2 stops27h 23mMultiple Airlines

Deal found 16/4C$ 222

Fri 9/51:10 a.m.SEA - YYZ

1 stop8h 20mAmerican Airlines

Deal found 17/4C$ 223

Mon 28/47:05 a.m.SEA - YKF

1 stop19h 10mMultiple Airlines

Deal found 16/4C$ 226

Tue 29/47:05 a.m.SEA - YKF

1 stop14h 41mWestJet

Deal found 16/4C$ 232

Sun 18/55:30 a.m.SEA - YYZ

2 stops11h 36mAir Canada

Deal found 16/4C$ 245

Cheapflights Fare Finder

Use the filters below to find and compare flights from Seattle to Toronto that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

SeattleHamilton

SEA - YHM

SEAYHM

Seattle/Tacoma Intl

Thu 14/8

1:50 p.m.-12:41 a.m.

1 stop7h 51m

Hamilton

Mon 18/8

6:00 a.m.-12:58 p.m.

1 stop9h 58m

C$ 236

SeattleHamilton

SEA - YHM

SEAYHM

Seattle/Tacoma Intl

Fri 2/5

8:56 p.m.-12:41 a.m.

2 stops24h 45m

Hamilton

Sun 11/5

6:00 a.m.-12:58 p.m.

1 stop9h 58m

C$ 315

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Tue 26/8

2:05 p.m.-12:24 a.m.

1 stop7h 19m

Toronto Pearson Intl

Thu 28/8

9:00 a.m.-6:38 p.m.

2 stops12h 38m

C$ 376

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Mon 12/5

6:00 a.m.-5:51 a.m.

3 stops20h 51m

Toronto Pearson Intl

Tue 20/5

8:35 p.m.-12:10 a.m.

1 stop30h 35m

C$ 377

SeattleToronto

SEA - YKF

SEAYKF

Seattle/Tacoma Intl

Tue 27/5

7:05 a.m.-12:46 a.m.

1 stop14h 41m

Toronto Region of Waterloo Intl

Thu 29/5

6:00 a.m.-2:25 p.m.

3 stops35h 25m

C$ 377

SeattleToronto

SEA - YKF

SEAYKF

Seattle/Tacoma Intl

Tue 17/6

7:05 a.m.-12:46 a.m.

1 stop14h 41m

Toronto Region of Waterloo Intl

Sat 12/7

6:00 a.m.-12:31 p.m.

2 stops33h 31m

C$ 394

SeattleToronto

SEA - YTZ

SEAYTZ

Seattle/Tacoma Intl

Sun 11/5

7:20 a.m.-7:50 p.m.

1 stop9h 30m

Toronto Island

Mon 12/5

12:25 p.m.-7:37 p.m.

1 stop10h 12m

C$ 420

SeattleToronto

SEA - YTZ

SEAYTZ

Seattle/Tacoma Intl

Sun 11/5

7:20 a.m.-7:50 p.m.

1 stop9h 30m

Toronto Island

Mon 12/5

5:25 p.m.-12:10 a.m.

2 stops33h 45m

C$ 423

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Sun 1/6

11:40 a.m.-7:37 p.m.

Nonstop4h 57m

Toronto Pearson Intl

Sun 8/6

8:30 a.m.-10:51 a.m.

Nonstop5h 21m

C$ 430

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Thu 8/5

7:15 a.m.-3:00 p.m.

Nonstop4h 45m

Toronto Pearson Intl

Sat 24/5

4:45 p.m.-7:04 p.m.

Nonstop5h 19m

C$ 456

Flights are sorted by cheapest round-trip flights first.

Deals found on 17/4

Showing 1-10 of 27 results

Best time to book a flight from Seattle to Toronto

Have a flexible travel schedule? Discover the best time to fly to Toronto from Seattle with our price prediction graph.

Estimated round-trip price

Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Seattle to Toronto

How far ahead should I book a flight from Seattle to Toronto?

Booking 69 days in advance of your planned departure date is, on average, the best time to get cheap flights from Seattle to Toronto. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

What is the cheapest month to book a flight from Seattle to Toronto?

Currently, January is the cheapest month in which you can book a flight from Seattle to Toronto (average of C$ 167). Flying from Seattle to Toronto in July is currently the most expensive (average of C$ 258). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from SEA to YTO?

Unlike in the morning, when flights are generally more expensive, you can save up to 58% on flights from Seattle to Toronto by exploring options for tickets in the afternoon.

Weekly flight availability from Seattle to Toronto

The most flights from SEA to YTO are scheduled on a Thursday (7 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (3 on average).

Rainfall in Toronto by month

In terms of precipitation, rainfall in Toronto ranges from 51.0 - 83.0 mm per month. June is typically the wettest month, when rainfall can reach 83.0 mm. February is typically the driest time to visit Toronto when rainfall is around 51.0 mm.

Temperature in Toronto by month

If weather is an important factor for your trip to Toronto, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 21.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around -6.0 C).

Reviews of airlines servicing Toronto

See what other customers who have flown with Alaska Airlines, Delta and United Airlines from Seattle to Toronto have to say. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

Alaska Airlines

8.0

Very good

9,887 reviews

Check prices

Reviews

1 / 20

8.0

Excellent

Anonymous,Aug 2024

SEA - LAS

Seats were not that comfy especially for someone with big hips 😥

Alaska Airlines

8.0

Very good

9,887 reviews

Alaska Airlines

8.0

Very good

9,887 reviews

Check prices

Reviews

1 / 20

8.0

Excellent

Anonymous,Aug 2024

SEA - LAS

Seats were not that comfy especially for someone with big hips 😥

Delta

8.0

Very good

7,916 reviews

Alaska Airlines

8.0

Very good

9,887 reviews

Check prices

Reviews

1 / 20

8.0

Excellent

Anonymous,Aug 2024

SEA - LAS

Seats were not that comfy especially for someone with big hips 😥

United Airlines

7.4

Good

8,667 reviews

Alaska Airlines

8.0

Very good

9,887 reviews

Check prices

Reviews

1 / 20

8.0

Excellent

Anonymous,Aug 2024

SEA - LAS

Seats were not that comfy especially for someone with big hips 😥

American Airlines

7.2

Good

10,000 reviews

Alaska Airlines

8.0

Very good

9,887 reviews

Check prices

Reviews

1 / 20

8.0

Excellent

Anonymous,Aug 2024

SEA - LAS

Seats were not that comfy especially for someone with big hips 😥

WestJet

7.2

Good

2,809 reviews

Alaska Airlines

8.0

Very good

9,887 reviews

Check prices

Reviews

1 / 20

8.0

Excellent

Anonymous,Aug 2024

SEA - LAS

Seats were not that comfy especially for someone with big hips 😥

Related info for your journey

What airport do you fly from for flights from Seattle to Toronto?
Seattle/Tacoma Intl (SEA), located 18.4 km from the city centre, is the airport you fly out of when you book flights from Seattle to Toronto. 3 airlines have flights from Seattle/Tacoma Intl to Toronto on a regular basis. Booking flights from Seattle/Tacoma Intl to Toronto should not be difficult; the airport handles an average of 5 outbound flights to Toronto per day.
What are the cheapest airlines flying from Seattle to Toronto round-trip?
According to our current data, WestJet (C$ 236), Air Canada (C$ 420), and Alaska Airlines (C$ 456) offers the cheapest pricing from Seattle to Toronto. You may be able to fly from Seattle to Toronto for 60% less than the average price by searching for these airlines.
What are the cheapest airlines to fly from Seattle to Toronto one-way?
For one-way options, check prices for WestJet. According to our data, you can fly for as low as C$ 94. Users have also found prices from C$ 207 and C$ 209 on Delta and Alaska Airlines, respectively.
What are the most popular routes from Seattle to Toronto?
Most travellers choose Seattle/Tacoma Intl - Toronto Pearson Intl, Seattle/Tacoma Intl - Toronto Island or Seattle/Tacoma Intl - Hamilton when deciding on the best route from Seattle to Toronto.
What are the most reliable airlines from Seattle to Toronto?
Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from Seattle to Toronto on time: Brussels Airlines (100%), Air Tahiti Nui (95%), Alaska Airlines (90%).
What are the cheapest flights from Seattle to Toronto?
On average you can expect to pay C$ 491 for a flight from Seattle to Toronto. The cheapest flight overall is C$ 222 while the most popular route, (Seattle/Tacoma Intl - Toronto Pearson Intl) is currently priced at C$ 290.
Can I find deals for flights from Seattle to Toronto that include hotel bookings?
Yes. In addition to deals on Seattle to Toronto flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Seattle to Toronto?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Seattle to Toronto.
Can I find deals for business class flights from Seattle to Toronto?
Yes. Cheapflights offers flight deals from Seattle to Toronto by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.
What is the cheapest month to book a flight from Seattle to Toronto?
Currently, January is the cheapest month in which you can book a flight from Seattle to Toronto (average of C$ 167). Flying from Seattle to Toronto in July is currently the most expensive (average of C$ 258). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Top 3 airlines flying from Seattle to Toronto

Airline	Cheapest	Average	Flexibility	On-time
Air Canada	CheapestC$ 226	AverageC$ 789	FlexibilityNo cancel fee	On-time67%	Search Air Canada flights
WestJet	CheapestC$ 298	AverageC$ 418	FlexibilityNo cancel fee	On-time60%	Search WestJet flights
Alaska Airlines	CheapestC$ 393	AverageC$ 667	FlexibilityNo cancel fee	On-time75%	Search Alaska Airlines flights

Fly with Cheapflights

How does Cheapflights help users find flights from Seattle to Toronto?

Deals for Seattle to Toronto flights are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose better, like price, airport, cabin class, and plenty of other options.

Why should you use Cheapflights to find cheap flight tickets from Seattle to Toronto?

Millions of users choose and trust Cheapflights to book the best flight deals from Seattle to Toronto for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.

Can Cheapflights find flights from Seattle to Toronto with no change fees?

Need flexible booking options for your flight to Toronto from Seattle? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.

Can Cheapflights notify me if prices for flights from Seattle to Toronto become cheaper?

Yes, Cheapflights has a feature called Price Alert, which notifies users when flight prices change. Track prices for your flight to Toronto from Seattle today and book when prices fit your budget.

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Cheap flights from Seattle to Toronto from C$ 94

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 30/5. Fares are subject to change and may not be available on all flights or dates of travel.

Cheapflights Tip: The best prices from Seattle/Tacoma Intl to Toronto are usually found in January or February, booked 69 days in advance, depart on a Thursday or Sunday and return on a Thursday

Cheap flight deals from Seattle to Toronto

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Good round-trip deal

Good one-way deal

Find flight deals from Seattle to Toronto

Cheapest flights from Seattle to TorontoExplore the most affordable flight options available from Seattle to Toronto. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 17 April 2025.

Explore the most affordable flight options available from Seattle to Toronto. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 17 April 2025.

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Use the filters below to find and compare flights from Seattle to Toronto that are best for you.

Best time to book a flight from Seattle to Toronto

Have a flexible travel schedule? Discover the best time to fly to Toronto from Seattle with our price prediction graph.

Cheapflights Insights

Everything you need to know about your flight from Seattle to Toronto

How far ahead should I book a flight from Seattle to Toronto?

Use this chart to determine the optimal time to book a round-trip flight from Seattle to Toronto. Price data was last updated on 11 April 2025.

What is the cheapest month to book a flight from Seattle to Toronto?

What is the cheapest time of day to fly from SEA to YTO?

Find hourly flight availability from Seattle to Toronto. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 17 April 2025.

Weekly flight availability from Seattle to Toronto

Explore weekly flight availability from Seattle to Toronto. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated 17 April 2025.

Rainfall in Toronto by month

Plan your trip to Toronto by taking into account the average rainfall totals by month.

Temperature in Toronto by month

Plan your trip to Toronto by taking into account the average temperature totals by month.

Reviews of airlines servicing Toronto

See what other customers who have flown with Alaska Airlines, Delta and United Airlines from Seattle to Toronto have to say. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

Find useful and relevant information for your journey from Seattle to Toronto. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

What airport do you fly from for flights from Seattle to Toronto?

What are the cheapest airlines flying from Seattle to Toronto round-trip?

What are the cheapest airlines to fly from Seattle to Toronto one-way?

What are the most popular routes from Seattle to Toronto?

What are the most reliable airlines from Seattle to Toronto?

What are the cheapest flights from Seattle to Toronto?

Can I find deals for flights from Seattle to Toronto that include hotel bookings?

How can I find direct flights from Seattle to Toronto?

Can I find deals for business class flights from Seattle to Toronto?

What is the cheapest month to book a flight from Seattle to Toronto?

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Alternative routes for Seattle to Toronto

See prices for flight routes from nearby airports that may be better suited for you.

Top 3 airlines flying from Seattle to Toronto

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Cheapest flights from Seattle to Toronto
Explore the most affordable flight options available from Seattle to Toronto. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 17 April 2025.