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$138+ 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 1/15. Fares are subject to change and may not be available on all flights or dates of travel.
YYZ — SEA
Jan 14 — Jan 211
Wed 1/14
Wed 1/21
1 adult, Economy
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Cheap 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 December 15, 2025.

This FlightHub deal was found by Cheapflights users on 12/14. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/261:30 pmYYZ - SEA
1 stop10h 16mMultiple Airlines
Wed 1/77:55 amSEA - YYZ
Nonstop4h 40mMultiple Airlines
Deal found 12/14$443
This Kiwi.com deal was found by Cheapflights users on 12/13. 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.
Sun 12/147:45 amYYZ - SEA
1 stop9h 35mWestJet
Sat 1/1711:55 amSEA - YYZ
2 stops8h 44mWestJet
Deal found 12/13$445
This United Airlines deal was found by Cheapflights users on 12/14. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/302:50 pmYYZ - SEA
1 stop11h 22mUnited Airlines
Tue 1/63:30 pmSEA - YYZ
2 stops15h 16mUnited Airlines
Deal found 12/14$458
This Kiwi.com deal was found by Cheapflights users on 12/13. 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.
Sun 12/148:20 pmYYZ - SEA
2 stops18h 33mMultiple Airlines
Sat 1/177:55 amSEA - YYZ
Nonstop4h 40mMultiple Airlines
Deal found 12/13$462
This oojo deal was found by Cheapflights users on 12/12. 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 12/136:30 pmYYZ - SEA
1 stop22h 50mWestJet
Fri 3/133:10 pmSEA - YYZ
2 stops11h 48mWestJet
Deal found 12/12$474
This FlightHub deal was found by Cheapflights users on 12/14. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/261:30 pmYYZ - SEA
1 stop10h 16mWestJet
Wed 1/73:10 pmSEA - YYZ
1 stop29h 01mWestJet
Deal found 12/14$498
This United Airlines deal was found by Cheapflights users on 12/15. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/2610:00 amYYZ - SEA
1 stop13h 57mUnited Airlines
Wed 1/711:45 pmSEA - YYZ
1 stop9h 03mUnited Airlines
Deal found 12/15$499
This FlightHub deal was found by Cheapflights users on 12/13. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/171:30 pmYYZ - SEA
1 stop10h 20mMultiple Airlines
Wed 1/147:55 amSEA - YYZ
Nonstop4h 40mMultiple Airlines
Deal found 12/13$503
This United Airlines deal was found by Cheapflights users on 12/14. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/255:25 pmYUL - PDX
1 stop8h 34mUnited Airlines
Thu 1/16:27 pmPDX - YUL
2 stops17h 49mUnited Airlines
Deal found 12/14$506
This United Airlines deal was found by Cheapflights users on 12/13. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/3010:00 amYYZ - PDX
2 stops15h 59mUnited Airlines
Fri 1/27:10 amPDX - YYZ
1 stop13h 49mUnited Airlines
Deal found 12/13$512
This United Airlines deal was found by Cheapflights users on 12/13. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/187:00 amYUL - PDX
2 stops18h 59mUnited Airlines
Thu 12/256:27 pmPDX - YUL
2 stops16h 33mUnited Airlines
Deal found 12/13$513
This United Airlines deal was found by Cheapflights users on 12/14. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/296:10 amYYZ - PDX
1 stop16h 33mUnited Airlines
Mon 1/511:59 pmPDX - YYZ
1 stop8h 21mUnited Airlines
Deal found 12/14$534

Find flight deals from Ontario to Washington

Keep the following information in mind while searching for Ontario to Washington flight deals. Data was last updated December 15, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$199
(SmartFares)

One-way from

$138
(Kiwi.com)

Popular in

December

Cheapest in

February

Average price

$449

Good round-trip deal

$392 or less

Good one-way deal

$163 or less
Provider with most accurate pricing for Toronto (YTO)-Seattle/Tacoma Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Toronto (YTO)-Seattle/Tacoma Intl flights.
Search Deals
From Ontario to Washington
Search Deals
One-way flight from Ontario to Washington
Search Deals
High demand for flights, 0% potential price rise
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($10 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 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

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 December 15, 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

Sat 1/24

4:45 pm-7:17 pm

Nonstop5h 32m

Seattle/Tacoma Intl

Sat 1/31

7:55 am-3:35 pm

Nonstop4h 40m

$211

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Thu 1/22

4:45 pm-7:17 pm

Nonstop5h 32m

Seattle/Tacoma Intl

Sun 1/25

7:55 am-3:35 pm

Nonstop4h 40m

$212

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Thu 1/15

4:45 pm-7:17 pm

Nonstop5h 32m

Seattle/Tacoma Intl

Sun 1/18

7:55 am-3:35 pm

Nonstop4h 40m

$227

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Fri 2/27

4:45 pm-7:18 pm

Nonstop5h 33m

Seattle/Tacoma Intl

Mon 3/2

7:55 am-3:35 pm

Nonstop4h 40m

$227

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Mon 2/9

4:45 pm-7:17 pm

Nonstop5h 32m

Seattle/Tacoma Intl

Thu 2/19

7:55 am-3:35 pm

Nonstop4h 40m

$227

TorontoSeattle

YKF - SEA

YKFSEA

Toronto Region of Waterloo Intl

Wed 5/13

6:00 am-8:28 pm

1 stop17h 28m

Seattle/Tacoma Intl

Sun 5/17

7:05 am-12:45 am

1 stop14h 40m

$231

TorontoSeattle

YKF - SEA

YKFSEA

Toronto Region of Waterloo Intl

Thu 3/26

6:20 am-2:19 pm

1 stop10h 59m

Seattle/Tacoma Intl

Sun 3/29

3:10 pm-5:29 am

1 stop11h 19m

$232

TorontoSeattle

YKF - SEA

YKFSEA

Toronto Region of Waterloo Intl

Mon 1/12

6:20 am-2:20 pm

1 stop11h 00m

Seattle/Tacoma Intl

Wed 1/14

3:10 pm-5:28 am

1 stop11h 18m

$232

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Wed 4/8

5:40 am-2:19 pm

2 stops11h 39m

Seattle/Tacoma Intl

Tue 4/14

3:10 pm-4:53 pm

1 stop22h 43m

$240

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Tue 1/6

9:00 pm-3:44 pm

2 stops21h 44m

Seattle/Tacoma Intl

Sat 1/10

3:30 pm-9:36 am

2 stops15h 06m

$243

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/14

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, December is the cheapest month in which you can book a flight from Region of Ontario to State of Washington (average of $133). Flying from Region of Ontario to State of Washington in June is currently the most expensive (average of $249). 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 December 15, 2025.

When flying from Region of Ontario to State of Washington, the time of day you fly usually plays a role in the price. Save by searching for a flight in the evening, which can drop the price by up to 15% versus a flight in the afternoon.

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 December 15, 2025.

The most flights from CAON to USWA are scheduled on a Monday (7 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (2 on average).

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 December 15, 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
11,453 reviews

Overall

8.0

Boarding

8.1

Food

7.1

Entertainment

7.0

Crew

8.5

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

Anonymous,Dec 2025

SJC - SEA

The flight was great. Don’t have to make it better. Everything was OK.
Alaska Airlines
8.0
Very good
11,453 reviews
Alaska Airlines
8.0
Very good
11,453 reviews

Overall

8.0

Boarding

8.1

Food

7.1

Entertainment

7.0

Crew

8.5

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

Anonymous,Dec 2025

SJC - SEA

The flight was great. Don’t have to make it better. Everything was OK.
Delta
7.9
Good
8,008 reviews
Alaska Airlines
8.0
Very good
11,453 reviews

Overall

8.0

Boarding

8.1

Food

7.1

Entertainment

7.0

Crew

8.5

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

Anonymous,Dec 2025

SJC - SEA

The flight was great. Don’t have to make it better. Everything was OK.
United Airlines
7.4
Good
9,092 reviews
Alaska Airlines
8.0
Very good
11,453 reviews

Overall

8.0

Boarding

8.1

Food

7.1

Entertainment

7.0

Crew

8.5

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

Anonymous,Dec 2025

SJC - SEA

The flight was great. Don’t have to make it better. Everything was OK.
WestJet
7.2
Good
3,202 reviews
Alaska Airlines
8.0
Very good
11,453 reviews

Overall

8.0

Boarding

8.1

Food

7.1

Entertainment

7.0

Crew

8.5

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

Anonymous,Dec 2025

SJC - SEA

The flight was great. Don’t have to make it better. Everything was OK.
Air Canada
7.1
Good
10,526 reviews
Alaska Airlines
8.0
Very good
11,453 reviews

Overall

8.0

Boarding

8.1

Food

7.1

Entertainment

7.0

Crew

8.5

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

Anonymous,Dec 2025

SJC - SEA

The flight was great. Don’t have to make it better. Everything was OK.

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 32m. 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 ($116), United Airlines ($136), and Air Canada ($144).

  • 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, December is the cheapest month in which you can book a flight from Region of Ontario to State of Washington (average of $133). Flying from Region of Ontario to State of Washington in June is currently the most expensive (average of $249). 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 December 15, 2025.
AirlineCheapestAverageFlexibilityOn-time
WestJetCheapest$193Average$379FlexibilityNo cancel feeOn-time60%
Alaska AirlinesCheapest$225Average$401FlexibilityNo cancel feeOn-time75%
Air CanadaCheapest$238Average$452FlexibilityNo cancel feeOn-time67%
United AirlinesCheapest$240Average$442FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$277Average$277FlexibilityNo cancel feeOn-time71%
DeltaCheapest$289Average$371FlexibilityNo cancel feeOn-timeN/A

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