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Cheap flights from Ontario to Washington from C$ 211

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 10/12. Fares are subject to change and may not be available on all flights or dates of travel.
YYZ — SEA
29 Nov — 6 Dec1
1 adult
1 adult, Economy, 0 bags

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 30 October 2025.

Round-trip from

C$ 295

One-way from

C$ 211

Popular in

December

Cheapest in

February

Average price

C$ 461

Good round-trip deal

C$ 375 or less

Good one-way deal

C$ 298 or less
WestJet
  • WestJet
  • 25/11-3/12
  • 3 total stops
  • 21h 18m total
  • Ontario to Washington
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Air Canada
  • Air Canada
  • 10/12
  • 1 total stop
  • 13h 36m total
  • Ontario to Washington
Search Deals
High demand for flights, 3% potential price rise
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Cheapest flight prices on average. 2% potential price decrease (C$ 15 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 2025
Search Deals
Price to beat on a round-trip flight from Ontario to Washington.
Search Deals
Price to beat on a one-way flight from Ontario to Washington.
Search Deals

Find flight deals from Ontario to Washington

Enter your travel dates to find the best prices.

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 30 October 2025.

Tue 25/117:45 a.m.YYZ - SEA
1 stop9h 35mWestJet
Sat 29/113:20 p.m.SEA - YYZ
2 stops11h 38mWestJet
Deal found 29/10C$ 297
Tue 25/117:45 a.m.YYZ - SEA
1 stop9h 35mWestJet
Fri 28/113:10 p.m.SEA - YYZ
2 stops11h 48mWestJet
Deal found 29/10C$ 306
Tue 2/127:45 a.m.YYZ - SEA
1 stop9h 35mWestJet
Sun 7/123:10 p.m.SEA - YYZ
2 stops11h 48mWestJet
Deal found 30/10C$ 309
Wed 26/114:45 p.m.YYZ - SEA
Nonstop5h 32mAlaska Airlines
Wed 3/127:55 a.m.SEA - YYZ
Nonstop4h 40mAlaska Airlines
Deal found 29/10C$ 311
Sun 23/117:45 a.m.YYZ - SEA
1 stop9h 35mWestJet
Sun 7/1211:55 a.m.SEA - YYZ
2 stops8h 44mWestJet
Deal found 28/10C$ 317
Tue 25/117:45 a.m.YYZ - SEA
1 stop9h 35mMultiple Airlines
Sat 29/117:57 a.m.SEA - YYZ
Nonstop4h 38mMultiple Airlines
Deal found 29/10C$ 321
Fri 21/118:45 p.m.YYZ - SEA
1 stop16h 37mWestJet
Sun 7/123:10 p.m.SEA - YYZ
2 stops11h 48mWestJet
Deal found 29/10C$ 323
Tue 25/117:45 a.m.YYZ - SEA
1 stop9h 35mWestJet
Sat 6/1211:55 a.m.SEA - YYZ
2 stops8h 44mWestJet
Deal found 28/10C$ 324
Sun 23/117:45 a.m.YYZ - SEA
1 stop9h 35mWestJet
Sat 6/123:20 p.m.SEA - YYZ
2 stops11h 38mWestJet
Deal found 28/10C$ 325
Sat 22/116:30 p.m.YYZ - SEA
1 stop22h 50mWestJet
Sat 29/113:20 p.m.SEA - YYZ
2 stops11h 38mWestJet
Deal found 29/10C$ 327
Tue 25/114:45 p.m.YYZ - SEA
Nonstop5h 32mMultiple Airlines
Fri 28/1111:55 a.m.SEA - YYZ
2 stops8h 44mMultiple Airlines
Deal found 29/10C$ 331
Tue 25/117:45 a.m.YYZ - SEA
1 stop9h 35mWestJet
Wed 3/123:15 p.m.SEA - YYZ
2 stops11h 43mWestJet
Deal found 28/10C$ 332

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 30 October 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

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Wed 26/11

4:45 p.m.-7:17 p.m.

Nonstop5h 32m

Seattle/Tacoma Intl

Sat 6/12

7:55 a.m.-3:35 p.m.

Nonstop4h 40m

C$ 335

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Sat 22/11

4:45 p.m.-7:17 p.m.

Nonstop5h 32m

Seattle/Tacoma Intl

Tue 25/11

7:57 a.m.-3:35 p.m.

Nonstop4h 38m

C$ 337

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Tue 14/4

5:50 p.m.-10:08 p.m.

1 stop7h 18m

Seattle/Tacoma Intl

Wed 15/4

8:00 p.m.-6:43 a.m.

1 stop7h 43m

C$ 339

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Tue 25/11

4:45 p.m.-7:17 p.m.

Nonstop5h 32m

Seattle/Tacoma Intl

Sun 7/12

7:55 a.m.-3:35 p.m.

Nonstop4h 40m

C$ 348

HamiltonSeattle

YHM - SEA

YHMSEA

Hamilton

Tue 3/2

5:50 a.m.-2:19 p.m.

1 stop11h 29m

Seattle/Tacoma Intl

Tue 10/2

3:10 p.m.-5:16 p.m.

1 stop23h 06m

C$ 349

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Fri 21/11

4:45 p.m.-7:17 p.m.

Nonstop5h 32m

Seattle/Tacoma Intl

Mon 24/11

7:57 a.m.-3:35 p.m.

Nonstop4h 38m

C$ 359

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Wed 26/11

5:55 p.m.-12:59 a.m.

1 stop10h 04m

Seattle/Tacoma Intl

Tue 2/12

8:00 p.m.-5:59 a.m.

1 stop6h 59m

C$ 362

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Wed 17/12

5:55 p.m.-12:50 a.m.

1 stop9h 55m

Seattle/Tacoma Intl

Tue 6/1

2:10 p.m.-11:59 p.m.

1 stop6h 49m

C$ 371

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Wed 17/12

5:55 p.m.-12:50 a.m.

1 stop9h 55m

Seattle/Tacoma Intl

Tue 6/1

8:10 a.m.-3:53 p.m.

Nonstop4h 43m

C$ 371

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Wed 26/11

5:55 p.m.-12:59 a.m.

1 stop10h 04m

Seattle/Tacoma Intl

Wed 3/12

3:25 p.m.-7:30 a.m.

1 stop13h 05m

C$ 371

Flights are sorted by cheapest round-trip flights first.

Deals found on 29/10

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, May is the cheapest month in which you can book a flight from Region of Ontario to State of Washington (average of C$ 128). Flying from Region of Ontario to State of Washington in June is currently the most expensive (average of C$ 348). 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 30 October 2025.

Unlike in the morning, when flights are generally more expensive, you can save up to 21% on flights from Region of Ontario to State of Washington by exploring options for tickets in the evening.

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

Use this chart to determine the cheapest time to fly round-trip from Ontario to Washington. Price data was last updated on 16 December 2024.

Travelers seeking maximum savings on their Region of Ontario to State of Washington flight should consider departing on Thursday evenings when fares are most often at their lowest. Saturday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

How much does it cost to fly round-trip from Region of Ontario to State of Washington?

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 30 October 2025.
Check out reviews from past customers who have flown with Alaska Airlines,Delta, andUnited Airlines from Ontario to Washington to help guide your decision. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
11,214 reviews
Check prices

Comfort

7.8

Entertainment

7.0

Food

7.1

Overall

8.0

Boarding

8.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Anonymous,Aug 2025

MFR - SEA

Great smooth flight. Was hour and half late though. Don't know why
Alaska Airlines
8.0
Very good
11,214 reviews
Alaska Airlines
8.0
Very good
11,214 reviews
Check prices

Comfort

7.8

Entertainment

7.0

Food

7.1

Overall

8.0

Boarding

8.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Anonymous,Aug 2025

MFR - SEA

Great smooth flight. Was hour and half late though. Don't know why
Delta
7.9
Good
7,993 reviews
Alaska Airlines
8.0
Very good
11,214 reviews
Check prices

Comfort

7.8

Entertainment

7.0

Food

7.1

Overall

8.0

Boarding

8.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Anonymous,Aug 2025

MFR - SEA

Great smooth flight. Was hour and half late though. Don't know why
United Airlines
7.4
Good
8,998 reviews
Alaska Airlines
8.0
Very good
11,214 reviews
Check prices

Comfort

7.8

Entertainment

7.0

Food

7.1

Overall

8.0

Boarding

8.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Anonymous,Aug 2025

MFR - SEA

Great smooth flight. Was hour and half late though. Don't know why
WestJet
7.2
Good
3,149 reviews
Alaska Airlines
8.0
Very good
11,214 reviews
Check prices

Comfort

7.8

Entertainment

7.0

Food

7.1

Overall

8.0

Boarding

8.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Anonymous,Aug 2025

MFR - SEA

Great smooth flight. Was hour and half late though. Don't know why
Air Canada
7.1
Good
10,376 reviews
Alaska Airlines
8.0
Very good
11,214 reviews
Check prices

Comfort

7.8

Entertainment

7.0

Food

7.1

Overall

8.0

Boarding

8.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Anonymous,Aug 2025

MFR - SEA

Great smooth flight. Was hour and half late though. Don't know why

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.

  • How long is the flight from Region of Ontario to State of Washington?

    For as low as C$ 335, Alaska Airlines can have you in State of Washington from Region of Ontario in 5h 32m. Region of Ontario and State of Washington are separated by a distance of 3306 km. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

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

    C$ 211 is the cheapest one-way deal found within the past few days, from Air Canada. You may also be able to find cheap deals on Alaska Airlines and WestJet, with prices starting from C$ 215 and C$ 221, 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, May is the cheapest month in which you can book a flight from Region of Ontario to State of Washington (average of C$ 128). Flying from Region of Ontario to State of Washington in June is currently the most expensive (average of C$ 348). 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

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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 30 October 2025.
AirlineCheapestAverageFlexibilityOn-time
WestJetCheapestC$ 185AverageC$ 431FlexibilityNo cancel feeOn-time60%
Search WestJet flights
United AirlinesCheapestC$ 281AverageC$ 547FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Alaska AirlinesCheapestC$ 304AverageC$ 514FlexibilityNo cancel feeOn-time75%
Search Alaska Airlines flights
Air CanadaCheapestC$ 344AverageC$ 593FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
DeltaCheapestC$ 378AverageC$ 533FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
Hawaiian AirlinesCheapestC$ 415AverageC$ 469FlexibilityNo cancel feeOn-time85%
Search Hawaiian Airlines flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travelers can enjoy low prices and a wide availability of flights to their desired destinations.

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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