What are the cheapest airlines to fly from State of Washington to Region of Ontario one-way?

The cheapest airlines for a one-way flight from State of Washington to Region of Ontario are WestJet (C$ 180), Air Canada (C$ 216), and Alaska Airlines (C$ 230).

How far in advance should I book a flight from State of Washington to Region of Ontario?

When searching for a good deal, it’s best to be prepared for potential fluctuations in price. We recommend booking at least 28 days in advance, which can save you up to 110% on flights from State of Washington to Region of Ontario compared to booking the week you need them. Waiting 28 days out may not be for everyone, so we have options available for flights within the next two weeks, with the lowest price starting at C$ 773. For sooner than that we have options available in the next 3 days from C$ 773.

What is the cheapest month to fly from State of Washington to Region of Ontario?

January is one of the best times of the year to fly to Region of Ontario from State of Washington. Prices for January average C$ 636 per person but you can even find prices for as low as C$ 183. The most expensive prices can be found in the month of April. Opting for a January flight can save you 24% on your journey compared to booking in April

Can I find deals for flights from Washington to Ontario that include hotel bookings?

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

How can I find direct flights from Washington to Ontario?

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

Can I find deals for business class flights from Washington to Ontario?

Yes. Cheapflights offers flight deals from Washington to Ontario 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$ 133+ Flights from Washington to Ontario

Cheap flight deals from Washington to Ontario

Round-trip from	C$ 354
One-way from	C$ 133
Popular in	April
Cheapest in	January
Average price	C$ 528
Good round-trip deal	C$ 438 or less
Good one-way deal	C$ 239 or less

WestJet
13/5-20/5
2 total stops
17h 39m total
Washington to Ontario

Search Deals

15/4
1 total stop
12h 23m total
Washington to Ontario

Search Deals

Highest demand for flights based on searches. 8% potential increase in price (C$ 88 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 2% potential price decrease (C$ 21 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in March 2025

Search Deals

Price to beat on a round-trip flight from Washington to Ontario.

Search Deals

Price to beat on a one-way flight from Washington to Ontario.

Search Deals

Find flight deals from Washington to Ontario

Cheapest flights from Washington to Ontario
Explore the most affordable flight options available from Washington to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 31 March 2025.

Tue 13/52:05 p.m.SEA - YKF

1 stop7h 41mWestJet

Tue 20/56:00 a.m.YKF - SEA

1 stop9h 58mWestJet

Deal found 30/3C$ 354

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

1 stop14h 25mMultiple Airlines

Tue 6/57:00 a.m.YYZ - SEA

1 stop20h 56mMultiple Airlines

Deal found 30/3C$ 355

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

2 stops33h 16mMultiple Airlines

Tue 6/56:00 a.m.YKF - SEA

1 stop9h 58mMultiple Airlines

Deal found 30/3C$ 362

Sun 15/67:05 a.m.SEA - YYZ

1 stop7h 17mWestJet

Wed 18/68:00 a.m.YYZ - SEA

1 stop7h 58mWestJet

Deal found 31/3C$ 381

Tue 29/42:32 p.m.PDX - YYZ

2 stops13h 20mMultiple Airlines

Tue 6/51:50 p.m.YYZ - PDX

1 stop25h 52mMultiple Airlines

Deal found 30/3C$ 389

Tue 29/42:05 p.m.SEA - YUL

1 stop7h 38mWestJet

Tue 6/57:00 a.m.YUL - SEA

1 stop8h 58mWestJet

Deal found 29/3C$ 411

Thu 8/51:50 p.m.SEA - YHM

1 stop7h 51mWestJet

Sat 10/56:00 a.m.YHM - SEA

1 stop17h 28mWestJet

Deal found 31/3C$ 419

Tue 13/53:20 p.m.SEA - YHM

2 stops30h 21mMultiple Airlines

Tue 20/56:00 a.m.YHM - SEA

1 stop9h 58mMultiple Airlines

Deal found 30/3C$ 424

Wed 14/57:05 a.m.SEA - YXU

1 stop9h 04mWestJet

Wed 21/56:00 a.m.YXU - SEA

1 stop9h 58mWestJet

Deal found 30/3C$ 425

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

2 stops14h 32mMultiple Airlines

Thu 29/57:00 a.m.YUL - SEA

1 stop8h 58mMultiple Airlines

Deal found 30/3C$ 435

Wed 20/81:45 p.m.PDX - YYZ

1 stop7h 39mWestJet

Thu 28/88:00 a.m.YYZ - PDX

1 stop7h 52mWestJet

Deal found 31/3C$ 439

Thu 5/61:45 p.m.PDX - YUL

1 stop7h 58mWestJet

Mon 9/67:00 a.m.YUL - PDX

1 stop8h 52mWestJet

Deal found 30/3C$ 448

Best flights from Washington to Ontario
Discover carefully curated flight deals from Washington to Ontario that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated 31 March 2025.

Tue 13/52:05 p.m.SEA - YKF

1 stop7h 41mWestJet

Tue 20/56:00 a.m.YKF - SEA

1 stop9h 58mWestJet

Deal found 30/3C$ 354

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

1 stop14h 25mMultiple Airlines

Tue 6/57:00 a.m.YYZ - SEA

1 stop20h 56mMultiple Airlines

Deal found 30/3C$ 355

Sat 31/511:30 a.m.SEA - YXU

1 stop6h 58mAir Canada

Sat 7/66:15 a.m.YXU - SEA

1 stop7h 36mAir Canada

Deal found 30/3C$ 472

Wed 21/55:18 p.m.SEA - YXU

2 stops18h 45mUnited Airlines

Wed 28/56:15 a.m.YXU - SEA

1 stop7h 30mUnited Airlines

Deal found 31/3C$ 487

Tue 29/47:15 a.m.SEA - YYZ

Nonstop4h 45mAlaska Airlines

Tue 6/54:45 p.m.YYZ - SEA

Nonstop5h 14mAlaska Airlines

Deal found 31/3C$ 530

Sun 4/55:15 a.m.PDX - YYZ

1 stop8h 23mDelta

Tue 6/53:59 p.m.YYZ - PDX

1 stop9h 10mDelta

Deal found 30/3C$ 562

Mon 21/411:45 p.m.SEA - YYZ

1 stop9h 04mLufthansa

Mon 28/47:20 p.m.YYZ - SEA

Nonstop5h 21mLufthansa

Deal found 31/3C$ 583

Wed 30/412:59 a.m.SEA - YYZ

1 stop8h 41mAmerican Airlines

Tue 6/56:30 a.m.YYZ - SEA

1 stop13h 58mAmerican Airlines

Deal found 30/3C$ 588

Sat 10/57:15 a.m.SEA - YYZ

Nonstop4h 45mHawaiian Airlines

Thu 22/54:45 p.m.YYZ - SEA

Nonstop5h 19mHawaiian Airlines

Deal found 30/3C$ 595

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

2 stops33h 16mMultiple Airlines

Tue 6/56:00 a.m.YKF - SEA

1 stop9h 58mMultiple Airlines

Deal found 30/3C$ 362

Sun 15/67:05 a.m.SEA - YYZ

1 stop7h 17mWestJet

Wed 18/68:00 a.m.YYZ - SEA

1 stop7h 58mWestJet

Deal found 31/3C$ 381

Tue 29/42:32 p.m.PDX - YYZ

2 stops13h 20mMultiple Airlines

Tue 6/51:50 p.m.YYZ - PDX

1 stop25h 52mMultiple Airlines

Deal found 30/3C$ 389

Direct flights from Washington to Ontario
Explore direct flight options from Washington to Ontario based on user searches, and compare prices and availability for your desired travel dates. Data last updated 31 March 2025.

Wed 14/511:30 a.m.SEA - YYZ

Nonstop4h 57mAir Canada

Wed 21/58:25 a.m.YYZ - SEA

Nonstop5h 20mAir Canada

Deal found 30/3C$ 465

Tue 29/47:15 a.m.SEA - YYZ

Nonstop4h 45mAlaska Airlines

Tue 6/54:45 p.m.YYZ - SEA

Nonstop5h 14mAlaska Airlines

Deal found 31/3C$ 530

Sat 10/57:15 a.m.SEA - YYZ

Nonstop4h 45mHawaiian Airlines

Thu 22/54:45 p.m.YYZ - SEA

Nonstop5h 19mHawaiian Airlines

Deal found 30/3C$ 595

Thu 21/87:24 a.m.SEA - YYZ

Nonstop4h 36mMultiple Airlines

Sun 24/88:50 a.m.YYZ - SEA

Nonstop5h 20mMultiple Airlines

Deal found 31/3C$ 759

Wed 14/57:20 a.m.SEA - YUL

Nonstop5h 10mAir Canada

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

Nonstop5h 52mAir Canada

Deal found 30/3C$ 794

Sat 2/812:10 p.m.SEA - YYZ

Nonstop4h 42mUnited Airlines

Sat 18/108:55 a.m.YYZ - SEA

Nonstop5h 19mUnited Airlines

Deal found 30/3C$ 847

Thu 22/57:20 a.m.SEA - YUL

Nonstop5h 10mUnited Airlines

Thu 29/54:45 p.m.YUL - SEA

Nonstop5h 52mUnited Airlines

Deal found 30/3C$ 956

Last-minute flights from Washington to Ontario
Discover last-minute flight deals from Washington to Ontario. Data last updated 31 March 2025 and is based on user searches.

Sat 5/410:50 a.m.PDX - YUL

1 stop7h 39mAir Canada

Wed 9/47:30 a.m.YUL - PDX

1 stop10h 15mAir Canada

Deal found 30/3C$ 663

Sat 5/48:45 a.m.PDX - YUL

2 stops9h 44mUnited Airlines

Wed 9/46:15 a.m.YUL - PDX

1 stop8h 37mUnited Airlines

Deal found 30/3C$ 673

Sat 5/41:20 p.m.PDX - YUL

3 stops32h 15mMultiple Airlines

Wed 9/46:45 a.m.YUL - PDX

3 stops38h 20mMultiple Airlines

Deal found 30/3C$ 827

Sun 6/49:45 p.m.SEA - YYZ

1 stop23h 55mWestJet

Sun 27/410:20 p.m.YYZ - SEA

2 stops25h 08mWestJet

Deal found 30/3C$ 781

Tue 8/44:16 p.m.SEA - YYZ

1 stop10h 39mMultiple Airlines

Tue 29/47:25 p.m.YYZ - SEA

1 stop19h 10mMultiple Airlines

Deal found 30/3C$ 404

Tue 8/46:13 p.m.PDX - YTZ

2 stops21h 40mMultiple Airlines

Thu 24/48:55 p.m.YTZ - PDX

2 stops19h 42mMultiple Airlines

Deal found 31/3C$ 610

Wed 9/46:20 a.m.SEA - YTZ

1 stop9h 40mMultiple Airlines

Mon 14/44:10 p.m.YTZ - SEA

2 stops20h 25mMultiple Airlines

Deal found 30/3C$ 651

Thu 10/410:25 a.m.PDX - YYZ

1 stop16h 30mMultiple Airlines

Tue 15/46:30 a.m.YYZ - PDX

2 stops14h 35mMultiple Airlines

Deal found 30/3C$ 408

Thu 10/47:51 p.m.SEA - YUL

2 stops15h 19mMultiple Airlines

Mon 14/44:45 p.m.YUL - SEA

1 stop24h 36mMultiple Airlines

Deal found 31/3C$ 661

Thu 10/48:56 p.m.SEA - YKF

2 stops25h 20mMultiple Airlines

Mon 14/46:30 a.m.YKF - SEA

1 stop10h 51mMultiple Airlines

Deal found 30/3C$ 693

Thu 10/47:23 a.m.PDX - YUL

2 stops13h 05mDelta

Sat 19/412:50 p.m.YUL - PDX

1 stop12h 45mDelta

Deal found 30/3C$ 701

Thu 10/412:59 a.m.PDX - YYZ

1 stop9h 36mDelta

Mon 14/411:34 a.m.YYZ - PDX

1 stop10h 08mDelta

Deal found 31/3C$ 729

One-way flights from Washington to Ontario
Search for one-way flight options from Washington to Ontario. Find affordable one-way fares based on user searches. Data last updated 31 March 2025.

Tue 15/42:32 p.m.PDX - YYZ

1 stop12h 23mMultiple Airlines

Deal found 31/3C$ 133

Tue 15/47:01 p.m.PDX - YTZ

2 stops20h 52mMultiple Airlines

Deal found 31/3C$ 149

Fri 4/75:52 p.m.GEG - YYZ

1 stop10h 08mMultiple Airlines

Deal found 30/3C$ 167

Mon 12/53:20 p.m.SEA - YHM

2 stops30h 21mMultiple Airlines

Deal found 30/3C$ 175

Tue 6/52:05 p.m.SEA - YHM

1 stop7h 36mWestJet

Deal found 30/3C$ 180

Tue 6/54:20 p.m.SEA - YYZ

3 stops29h 13mMultiple Airlines

Deal found 30/3C$ 190

Fri 4/77:35 p.m.SEA - YYZ

1 stop7h 37mWestJet

Deal found 30/3C$ 198

Tue 27/52:05 p.m.SEA - YKF

1 stop7h 41mWestJet

Deal found 31/3C$ 199

Tue 2/92:05 p.m.SEA - YUL

1 stop7h 36mWestJet

Deal found 30/3C$ 209

Mon 5/57:05 a.m.SEA - YTZ

2 stops32h 05mMultiple Airlines

Deal found 30/3C$ 215

Mon 5/57:20 a.m.SEA - YTZ

1 stop9h 30mAir Canada

Deal found 30/3C$ 216

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

2 stops33h 13mMultiple Airlines

Deal found 30/3C$ 220

Cheapflights Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

SeattleToronto

SEA - YKF

SEAYKF

Seattle/Tacoma Intl

Tue 13/5

2:05 p.m.-12:46 a.m.

1 stop7h 41m

Toronto Region of Waterloo Intl

Tue 20/5

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

1 stop9h 58m

C$ 354

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Tue 29/4

12:30 p.m.-5:55 a.m.

1 stop14h 25m

Toronto Pearson Intl

Tue 6/5

7:00 a.m.-12:56 a.m.

1 stop20h 56m

C$ 355

SeattleToronto

SEA - YKF

SEAYKF

Seattle/Tacoma Intl

Tue 29/4

12:30 p.m.-12:46 a.m.

2 stops33h 16m

Toronto Region of Waterloo Intl

Tue 6/5

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

1 stop9h 58m

C$ 362

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Sun 15/6

7:05 a.m.-5:22 p.m.

1 stop7h 17m

Toronto Pearson Intl

Wed 18/6

8:00 a.m.-12:58 p.m.

1 stop7h 58m

C$ 381

PortlandToronto

PDX - YYZ

PDXYYZ

Portland

Tue 29/4

2:32 p.m.-6:52 a.m.

2 stops13h 20m

Toronto Pearson Intl

Tue 6/5

1:50 p.m.-12:42 p.m.

1 stop25h 52m

C$ 389

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Tue 29/4

2:05 p.m.-12:43 a.m.

1 stop7h 38m

Montreal Pierre Elliott Trudeau Intl

Tue 6/5

7:00 a.m.-12:58 p.m.

1 stop8h 58m

C$ 411

SeattleHamilton

SEA - YHM

SEAYHM

Seattle/Tacoma Intl

Thu 8/5

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

1 stop7h 51m

Hamilton

Sat 10/5

6:00 a.m.-8:28 p.m.

1 stop17h 28m

C$ 419

SeattleHamilton

SEA - YHM

SEAYHM

Seattle/Tacoma Intl

Tue 13/5

3:20 p.m.-12:41 a.m.

2 stops30h 21m

Hamilton

Tue 20/5

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

1 stop9h 58m

C$ 424

SeattleLondon

SEA - YXU

SEAYXU

Seattle/Tacoma Intl

Wed 14/5

7:05 a.m.-7:09 p.m.

1 stop9h 04m

London

Wed 21/5

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

1 stop9h 58m

C$ 425

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Tue 27/5

7:05 a.m.-12:37 a.m.

2 stops14h 32m

Montreal Pierre Elliott Trudeau Intl

Thu 29/5

7:00 a.m.-12:58 p.m.

1 stop8h 58m

C$ 435

Flights are sorted by cheapest round-trip flights first.

Deals found on 31/3

Showing 1-10 of 60 results

...

Best time to book a flight from Washington to Ontario

Have a flexible travel schedule? Discover the best time to fly to Ontario from Washington 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 Washington to Ontario

What is the cheapest month to book a flight from State of Washington to Region of Ontario?

Currently, January is the cheapest month in which you can book a flight from State of Washington to Region of Ontario (average of C$ 167). Flying from State of Washington to Region of Ontario 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 WA to ON?

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from State of Washington to Region of Ontario as you normally would.

Weekly flight availability from State of Washington to Region of Ontario

The most flights from USWA to CAON are scheduled on a Monday (6 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (2 on average).

Rainfall in Ontario by month

In terms of precipitation, rainfall in Region of Ontario 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 Region of Ontario when rainfall is around 51.0 mm.

Temperature in Ontario by month

If weather is an important factor for your trip to Region of Ontario, 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 Ontario

See what other customers who have flown with Alaska Airlines, Delta and Hawaiian Airlines from Washington to Ontario have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.

Alaska Airlines

8.0

Very good

9,818 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

9,818 reviews

Alaska Airlines

8.0

Very good

9,818 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

7,899 reviews

Alaska Airlines

8.0

Very good

9,818 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 😥

Hawaiian Airlines

7.9

Good

2,344 reviews

Alaska Airlines

8.0

Very good

9,818 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 😥

SWISS

7.5

Good

1,570 reviews

Alaska Airlines

8.0

Very good

9,818 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

8,614 reviews

Alaska Airlines

8.0

Very good

9,818 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 are the cheapest airlines to fly from State of Washington to Region of Ontario one-way?
The cheapest airlines for a one-way flight from State of Washington to Region of Ontario are WestJet (C$ 180), Air Canada (C$ 216), and Alaska Airlines (C$ 230).
Can I find deals for flights from Washington to Ontario that include hotel bookings?
Yes. In addition to deals on Washington to Ontario flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Washington to Ontario?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Washington to Ontario.
Can I find deals for business class flights from Washington to Ontario?
Yes. Cheapflights offers flight deals from Washington to Ontario 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 State of Washington to Region of Ontario?
Currently, January is the cheapest month in which you can book a flight from State of Washington to Region of Ontario (average of C$ 167). Flying from State of Washington to Region of Ontario 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

Alternative routes for Washington to Ontario

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Complete your trip

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Washington to Ontario flights

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Top 4 airlines flying from Washington to Ontario

Airline	Cheapest	Average	Flexibility	On-time
Air Canada	CheapestC$ 233	AverageC$ 829	FlexibilityNo cancel fee	On-time67%	Search Air Canada flights
WestJet	CheapestC$ 307	AverageC$ 432	FlexibilityNo cancel fee	On-time60%	Search WestJet flights
Alaska Airlines	CheapestC$ 395	AverageC$ 697	FlexibilityNo cancel fee	On-time75%	Search Alaska Airlines flights
United Airlines	CheapestC$ 524	AverageC$ 759	FlexibilityNo cancel fee	On-time69%	Search United Airlines flights

Fly with Cheapflights

How does Cheapflights help users find flights from Washington to Ontario?

900+ travel sites are searched through when a user searches for a flight using Cheapflights. From the search interface, users can use filters to choose airlines, airports, flight times, cabin classes and more to their preference. Book your flight to Ontario from Washington today with Cheapflights!

Why should you use Cheapflights to find cheap flight tickets from Washington to Ontario?

Cheapflights simply makes it quick and affordable to book flights from Washington to Ontario by bringing together all flight options from hundreds of airlines and agencies online — and put it in one place for you to choose from. Plus, Cheapflights is 100% free to use for all.

Can Cheapflights find flights from Washington to Ontario with no change fees?

Certainly. Search results for flights to Ontario from Washington shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.

Can Cheapflights notify me if prices for flights from Washington to Ontario become cheaper?

Of course! You can now track prices for flights from Washington to Ontario and get an alert from Cheapflights when they change. Have a valid email address ready and click the bell icon next to the flight deals above to set up your price alerts.

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Cheap flights from Washington to Ontario from C$ 133

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 15/4. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from Washington to Ontario

Keep the following information in mind while searching for Washington to Ontario flight deals. Data was last updated 31 March 2025.

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Good round-trip deal

Good one-way deal

Find flight deals from Washington to Ontario

Cheapest flights from Washington to OntarioExplore the most affordable flight options available from Washington to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 31 March 2025.

Explore the most affordable flight options available from Washington to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 31 March 2025.

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

Best time to book a flight from Washington to Ontario

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

Cheapflights Insights

Everything you need to know about your flight from Washington to Ontario

What is the cheapest month to book a flight from State of Washington to Region of Ontario?

What is the cheapest time of day to fly from WA to ON?

Find hourly flight availability from Washington to Ontario. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 31 March 2025.

Weekly flight availability from State of Washington to Region of Ontario

Explore weekly flight availability from Washington to Ontario. 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 31 March 2025.

Rainfall in Ontario by month

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

Temperature in Ontario by month

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

Reviews of airlines servicing Ontario

See what other customers who have flown with Alaska Airlines, Delta and Hawaiian Airlines from Washington to Ontario have to say. You can also see how each airline compares 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 Washington to Ontario. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

What are the cheapest airlines to fly from State of Washington to Region of Ontario one-way?

Can I find deals for flights from Washington to Ontario that include hotel bookings?

How can I find direct flights from Washington to Ontario?

Can I find deals for business class flights from Washington to Ontario?

What is the cheapest month to book a flight from State of Washington to Region of Ontario?

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Alternative routes for Washington to Ontario

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Top 4 airlines flying from Washington to Ontario

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Cheapest flights from Washington to Ontario
Explore the most affordable flight options available from Washington to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 31 March 2025.