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Cheap flights from Ontario to Washington from C$ 199

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 13/5. Fares are subject to change and may not be available on all flights or dates of travel.
YYZ — SEA
2 Apr — 9 Apr1
1 adult

Cheap flight deals from Ontario to Washington

Keep the following information in mind while searching for Ontario to Washington flight deals. Data was last updated 28 March 2025.

Round-trip from

C$ 340

One-way from

C$ 199

Popular in

May

Cheapest in

February

Average price

C$ 510

Good round-trip deal

C$ 514 or less

Good one-way deal

C$ 318 or less
WestJet
  • WestJet
  • 4/5-7/5
  • 2 total stops
  • 17h 49m total
  • Ontario to Washington
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WestJet
  • WestJet
  • 13/5
  • 1 total stop
  • 9h 58m total
  • Ontario to Washington
Search Deals
Highest demand for flights based on searches. 13% potential increase in price (C$ 120 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (C$ 18 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 2025
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Price to beat on a round-trip flight from Ontario to Washington.
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Price to beat on a one-way flight from Ontario to Washington.
Search Deals

Find flight deals from Ontario to Washington

Cheapest flights from Ontario to Washington
Explore the most affordable flight options available from Ontario to Washington. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 28 March 2025.

Fri 2/56:00 a.m.YHM - SEA
1 stop9h 58mWestJet
Mon 5/52:05 p.m.SEA - YHM
1 stop7h 36mWestJet
Deal found 27/3C$ 337
Wed 30/46:00 a.m.YKF - SEA
1 stop9h 58mWestJet
Wed 7/51:50 p.m.SEA - YKF
1 stop7h 56mWestJet
Deal found 27/3C$ 346
Fri 30/58:00 a.m.YYZ - SEA
1 stop7h 58mWestJet
Sun 8/67:05 a.m.SEA - YYZ
1 stop7h 17mWestJet
Deal found 26/3C$ 346
Wed 28/57:50 a.m.YOW - SEA
1 stop8h 08mWestJet
Wed 11/67:05 a.m.SEA - YOW
1 stop8h 16mWestJet
Deal found 27/3C$ 347
Wed 30/42:00 p.m.YYZ - SEA
2 stops32h 51mMultiple Airlines
Wed 7/56:00 a.m.SEA - YYZ
1 stop10h 59mMultiple Airlines
Deal found 27/3C$ 354
Mon 21/78:00 a.m.YYZ - PDX
1 stop7h 52mWestJet
Mon 4/81:45 p.m.PDX - YYZ
2 stops13h 06mWestJet
Deal found 27/3C$ 400
Tue 29/46:00 a.m.YHM - SEA
1 stop9h 58mMultiple Airlines
Wed 30/412:30 p.m.SEA - YHM
2 stops33h 11mMultiple Airlines
Deal found 27/3C$ 402
Thu 1/58:00 a.m.YYZ - PDX
1 stop7h 52mMultiple Airlines
Tue 6/57:01 p.m.PDX - YYZ
1 stop21h 58mMultiple Airlines
Deal found 27/3C$ 404
Mon 12/512:25 p.m.YTZ - SEA
1 stop10h 12mAir Canada
Mon 19/57:15 p.m.SEA - YTZ
2 stops13h 32mAir Canada
Deal found 27/3C$ 410
Fri 4/77:00 a.m.YUL - PDX
1 stop8h 52mWestJet
Tue 22/71:45 p.m.PDX - YUL
1 stop7h 58mWestJet
Deal found 28/3C$ 413
Thu 5/66:00 a.m.YKF - SEA
1 stop9h 58mMultiple Airlines
Wed 11/66:00 a.m.SEA - YKF
2 stops15h 46mMultiple Airlines
Deal found 27/3C$ 417
Mon 12/512:00 p.m.YYZ - SEA
1 stop10h 37mAir Canada
Mon 19/57:15 p.m.SEA - YYZ
2 stops13h 24mAir Canada
Deal found 27/3C$ 419

Cheapflights Fare Finder

Customize your flight search to find flights from Ontario to Washington that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 629,999 searches. Data last updated 28 March 2025.
Use the filters below to find and compare flights from Ontario to Washington that are best for you.

Fly from

Ontario

Fly to

Washington

Route

Depart

Return

Price

HamiltonSeattle

YHM - SEA

YHMSEA

Hamilton

Fri 2/5

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

1 stop9h 58m

Seattle/Tacoma Intl

Mon 5/5

2:05 p.m.-12:41 a.m.

1 stop7h 36m

C$ 337

TorontoSeattle

YKF - SEA

YKFSEA

Toronto Region of Waterloo Intl

Wed 30/4

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

1 stop9h 58m

Seattle/Tacoma Intl

Wed 7/5

1:50 p.m.-12:46 a.m.

1 stop7h 56m

C$ 346

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Fri 30/5

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

1 stop7h 58m

Seattle/Tacoma Intl

Sun 8/6

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

1 stop7h 17m

C$ 346

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Wed 28/5

7:50 a.m.-12:58 p.m.

1 stop8h 08m

Seattle/Tacoma Intl

Wed 11/6

7:05 a.m.-6:21 p.m.

1 stop8h 16m

C$ 347

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Wed 30/4

2:00 p.m.-7:51 p.m.

2 stops32h 51m

Seattle/Tacoma Intl

Wed 7/5

6:00 a.m.-7:59 p.m.

1 stop10h 59m

C$ 354

TorontoPortland

YYZ - PDX

YYZPDX

Toronto Pearson Intl

Mon 21/7

8:00 a.m.-12:52 p.m.

1 stop7h 52m

Portland

Mon 4/8

1:45 p.m.-5:51 a.m.

2 stops13h 06m

C$ 400

HamiltonSeattle

YHM - SEA

YHMSEA

Hamilton

Tue 29/4

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

1 stop9h 58m

Seattle/Tacoma Intl

Wed 30/4

12:30 p.m.-12:41 a.m.

2 stops33h 11m

C$ 402

TorontoPortland

YYZ - PDX

YYZPDX

Toronto Pearson Intl

Thu 1/5

8:00 a.m.-12:52 p.m.

1 stop7h 52m

Portland

Tue 6/5

7:01 p.m.-7:59 p.m.

1 stop21h 58m

C$ 404

TorontoSeattle

YTZ - SEA

YTZSEA

Toronto Island

Mon 12/5

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

1 stop10h 12m

Seattle/Tacoma Intl

Mon 19/5

7:15 p.m.-11:47 a.m.

2 stops13h 32m

C$ 410

MontrealPortland

YUL - PDX

YULPDX

Montreal Pierre Elliott Trudeau Intl

Fri 4/7

7:00 a.m.-12:52 p.m.

1 stop8h 52m

Portland

Tue 22/7

1:45 p.m.-12:43 a.m.

1 stop7h 58m

C$ 413

Flights are sorted by cheapest round-trip flights first.

Deals found on 27/3

Showing 1-10 of 60 results
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Best time to book a flight from Ontario to Washington

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

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

Currently, January is the cheapest month in which you can book a flight from Region of Ontario to State of Washington (average of C$ 261). Flying from Region of Ontario to State of Washington in December is currently the most expensive (average of C$ 353). 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 ON to WA?

Find hourly flight availability from Ontario to Washington. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 28 March 2025.

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

Rainfall in Washington by month

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

In terms of precipitation, rainfall in State of Washington ranges from 18.0 - 168.0 mm per month. November is typically the wettest month, when rainfall can reach 168.0 mm. July is typically the driest time to visit State of Washington when rainfall is around 18.0 mm.

Temperature in Washington by month

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

If weather is an important factor for your trip to State of Washington, 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 19.0 C. Travellers hoping to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 5.0 C).

Reviews of airlines servicing Washington

Get insights into the airlines that provide service to Washington. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Washington. Reviews last updated 28 March 2025.
To help decide which airline to fly from Ontario to Washington, see what other customers have to say about Alaska Airlines, Delta and Hawaiian Airlines. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
9,798 reviews
Check prices

Entertainment

7.1

Overall

8.0

Food

7.1

Comfort

7.9

Boarding

8.2

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Alaska Airlines
8.0
Very good
9,798 reviews
Alaska Airlines
8.0
Very good
9,798 reviews
Check prices

Entertainment

7.1

Overall

8.0

Food

7.1

Comfort

7.9

Boarding

8.2

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Delta
8.0
Very good
7,896 reviews
Alaska Airlines
8.0
Very good
9,798 reviews
Check prices

Entertainment

7.1

Overall

8.0

Food

7.1

Comfort

7.9

Boarding

8.2

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Hawaiian Airlines
7.9
Good
2,335 reviews
Alaska Airlines
8.0
Very good
9,798 reviews
Check prices

Entertainment

7.1

Overall

8.0

Food

7.1

Comfort

7.9

Boarding

8.2

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
United Airlines
7.4
Good
8,603 reviews
Alaska Airlines
8.0
Very good
9,798 reviews
Check prices

Entertainment

7.1

Overall

8.0

Food

7.1

Comfort

7.9

Boarding

8.2

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
American Airlines
7.2
Good
10,000 reviews
Alaska Airlines
8.0
Very good
9,798 reviews
Check prices

Entertainment

7.1

Overall

8.0

Food

7.1

Comfort

7.9

Boarding

8.2

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

Related info for your journey

Find useful and relevant information for your journey from Ontario to Washington. 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 Region of Ontario to State of Washington one-way?

    C$ 199 is the cheapest one-way deal found within the past few days, from WestJet. You may also be able to find cheap deals on Air Canada and Alaska Airlines, with prices starting from C$ 239 and C$ 250, respectively.

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

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

  • How can I find direct flights from Ontario to Washington?

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

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

    Yes. Cheapflights offers flight deals from Ontario to Washington 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 Region of Ontario to State of Washington?

    Currently, January is the cheapest month in which you can book a flight from Region of Ontario to State of Washington (average of C$ 261). Flying from Region of Ontario to State of Washington in December is currently the most expensive (average of C$ 353). 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

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Alternative routes for Ontario to Washington

See prices for flight routes from nearby airports that may be better suited for you.
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Top 6 airlines flying from Ontario to Washington

Discover the top 6 airlines that operate flights from Ontario to Washington. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 629,999 searches. Data last updated 28 March 2025.
AirlineCheapestAverageFlexibilityOn-time
WestJetCheapestC$ 305AverageC$ 565FlexibilityNo cancel feeOn-time60%
Search WestJet flights
Alaska AirlinesCheapestC$ 343AverageC$ 749FlexibilityNo cancel feeOn-time75%
Search Alaska Airlines flights
Air CanadaCheapestC$ 350AverageC$ 774FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
United AirlinesCheapestC$ 378AverageC$ 879FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
DeltaCheapestC$ 413AverageC$ 605FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
American AirlinesCheapestC$ 443AverageC$ 570FlexibilityNo cancel feeOn-time71%
Search American Airlines flights

Fly with Cheapflights

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

Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from Ontario to Washington. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.

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

By finding flights from multiple airlines and providers at completely no cost, Cheapflights helps millions of users like you annually find the best flights to Washington from Ontario.

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

Need flexible booking options for your flight to Washington from Ontario? 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 Ontario to Washington become cheaper?

Of course! You can now track prices for flights from Ontario to Washington 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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