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$126+ Cheap flights from Ontario to Washington

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 10/25. Fares are subject to change and may not be available on all flights or dates of travel.
YYZ — SEA
Oct 12 — Oct 191
Sun 10/12
Sun 10/19
1 adult, Economy
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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 September 12, 2025.

Round-trip from

$214
(oojo)

One-way from

$126
(Trip.com)

Popular in

December

Cheapest in

February

Average price

$381

Good round-trip deal

$317 or less

Good one-way deal

$272 or less
From Ontario to Washington
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One-way flight from Ontario to Washington
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High demand for flights, 5% potential price rise
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Cheapest flight prices on average. 1% potential price decrease ($5 potential savings vs. average RT price).
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Average for round-trip flights in September 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.
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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 September 12, 2025.

This oojo deal was found by Cheapflights users on 9/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/236:00 amYHM - SEA
1 stop9h 59mWestJet
Fri 10/241:50 pmSEA - YHM
1 stop7h 50mWestJet
Deal found 9/12$214
This Trip.com deal was found by Cheapflights users on 9/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/136:20 amYKF - SEA
1 stop11h 00mWestJet
Wed 11/193:10 pmSEA - YKF
1 stop11h 18mWestJet
Deal found 9/12$228
This Justfly.com deal was found by Cheapflights users on 9/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/1210:00 amYYZ - SEA
1 stop7h 31mAir Canada
Thu 11/208:00 pmSEA - YYZ
1 stop7h 29mAir Canada
Deal found 9/12$228
This Kiwi.com deal was found by Cheapflights users on 9/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/137:45 amYYZ - SEA
1 stop9h 35mWestJet
Fri 11/2111:55 amSEA - YYZ
2 stops8h 44mWestJet
Deal found 9/12$229
This Justfly.com deal was found by Cheapflights users on 9/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/137:50 pmYYZ - SEA
Nonstop5h 26mAir Canada
Thu 11/208:00 pmSEA - YYZ
1 stop7h 29mAir Canada
Deal found 9/12$230
This Kiwi.com deal was found by Cheapflights users on 9/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/127:45 amYYZ - SEA
1 stop9h 35mWestJet
Fri 11/2111:55 amSEA - YYZ
2 stops8h 44mWestJet
Deal found 9/12$231
This Kiwi.com deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/207:45 amYYZ - SEA
1 stop9h 35mWestJet
Tue 11/253:10 pmSEA - YYZ
1 stop12h 03mWestJet
Deal found 9/11$232
This Trip.com deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/126:45 amYYZ - SEA
1 stop8h 50mWestJet
Thu 10/168:40 amSEA - YYZ
1 stop7h 12mWestJet
Deal found 9/11$233
This oojo deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/66:00 amYKF - SEA
1 stop17h 29mWestJet
Wed 10/221:50 pmSEA - YKF
1 stop7h 55mWestJet
Deal found 9/10$234
This oojo deal was found by Cheapflights users on 9/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/258:00 amYYZ - SEA
1 stop7h 59mWestJet
Mon 10/2711:55 amSEA - YYZ
1 stop16h 03mWestJet
Deal found 9/12$234
This Trip.com deal was found by Cheapflights users on 9/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/137:45 amYYZ - SEA
1 stop9h 35mMultiple Airlines
Wed 11/197:55 amSEA - YYZ
Nonstop4h 40mMultiple Airlines
Deal found 9/12$235
This Air Canada deal was found by Cheapflights users on 9/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/117:50 pmYYZ - SEA
Nonstop5h 26mAir Canada
Wed 11/1910:05 amSEA - YYZ
1 stop7h 49mAir Canada
Deal found 9/12$236

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 2,558,603 searches. Data last updated September 12, 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

YKF - SEA

YKFSEA

Toronto Region of Waterloo Intl

Thu 11/13

6:20 am-2:20 pm

1 stop11h 00m

Seattle/Tacoma Intl

Wed 11/19

3:10 pm-5:28 am

1 stop11h 18m

$228

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Thu 11/13

7:45 am-2:20 pm

1 stop9h 35m

Seattle/Tacoma Intl

Mon 11/17

11:55 am-11:39 pm

2 stops8h 44m

$229

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Thu 11/13

7:45 am-2:20 pm

1 stop9h 35m

Seattle/Tacoma Intl

Fri 11/21

11:55 am-11:39 pm

2 stops8h 44m

$229

TorontoSeattle

YKF - SEA

YKFSEA

Toronto Region of Waterloo Intl

Mon 10/6

6:00 am-8:29 pm

1 stop17h 29m

Seattle/Tacoma Intl

Wed 10/22

1:50 pm-12:45 am

1 stop7h 55m

$234

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Tue 11/11

7:50 pm-10:16 pm

Nonstop5h 26m

Seattle/Tacoma Intl

Wed 11/19

10:05 am-8:54 pm

1 stop7h 49m

$236

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Sat 10/4

7:00 am-6:49 pm

1 stop14h 49m

Seattle/Tacoma Intl

Sun 10/12

2:55 pm-1:06 am

1 stop7h 11m

$238

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Sat 11/15

3:30 pm-10:45 pm

1 stop10h 15m

Seattle/Tacoma Intl

Sat 11/22

11:50 pm-11:48 am

1 stop8h 58m

$242

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Tue 11/11

2:57 pm-10:41 pm

1 stop10h 44m

Seattle/Tacoma Intl

Sat 11/22

11:50 pm-11:48 am

1 stop8h 58m

$242

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Wed 2/11

7:50 pm-10:16 pm

Nonstop5h 26m

Seattle/Tacoma Intl

Mon 2/16

8:15 am-3:58 pm

Nonstop4h 43m

$244

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Sat 11/15

4:45 pm-7:05 pm

Nonstop5h 20m

Seattle/Tacoma Intl

Mon 11/17

7:55 am-3:35 pm

Nonstop4h 40m

$245

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/12

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 $238). Flying from Region of Ontario to State of Washington in June is currently the most expensive (average of $388). 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 September 12, 2025.

When flying from Region of Ontario to State of Washington, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Weekly flight availability from Region of Ontario to State of Washington

Explore weekly flight availability from Ontario to Washington. 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 September 12, 2025.

The most flights from CAON to USWA are scheduled on a Friday (6 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (3 on average).

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 September 12, 2025.
Read through reviews of airlines operating flights from Ontario to Washington, such as Alaska Airlines, Delta, and United 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
10,000 reviews

Overall

8.0

Comfort

7.8

Food

7.1

Crew

8.5

Entertainment

7.0

Boarding

8.1

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
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Comfort

7.8

Food

7.1

Crew

8.5

Entertainment

7.0

Boarding

8.1

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
8.0
Very good
7,960 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Comfort

7.8

Food

7.1

Crew

8.5

Entertainment

7.0

Boarding

8.1

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
8,936 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Comfort

7.8

Food

7.1

Crew

8.5

Entertainment

7.0

Boarding

8.1

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
3,091 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Comfort

7.8

Food

7.1

Crew

8.5

Entertainment

7.0

Boarding

8.1

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
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Comfort

7.8

Food

7.1

Crew

8.5

Entertainment

7.0

Boarding

8.1

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?

    Departing from Region of Ontario to State of Washington will take you 5h 20m. The distance from Region of Ontario to State of Washington is about 2054 mi. This flight may include one or multiple stops.

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

    The cheapest airlines for a one-way flight from Region of Ontario to State of Washington are WestJet ($137), Air Canada ($158), and Alaska Airlines ($158).

  • 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 $238). Flying from Region of Ontario to State of Washington in June is currently the most expensive (average of $388). 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 2,558,603 searches. Data last updated September 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
WestJetCheapest$226Average$373FlexibilityNo cancel feeOn-time60%
United AirlinesCheapest$240Average$469FlexibilityNo cancel feeOn-time69%
Alaska AirlinesCheapest$243Average$381FlexibilityNo cancel feeOn-time75%
Air CanadaCheapest$247Average$460FlexibilityNo cancel feeOn-time67%
American AirlinesCheapest$277Average$277FlexibilityNo cancel feeOn-time71%
DeltaCheapest$289Average$362FlexibilityNo cancel feeOn-timeN/A

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