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Ontario

$117+ Cheap flights from Washington to Ontario

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 9/19. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — YYZ
Aug 4 — Aug 111
Mon 8/4
Mon 8/11
1 adult, Economy
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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 July 30, 2025.

Round-trip from

$243
(iWofly)

One-way from

$117
(Kiwi.com)

Popular in

June

Cheapest in

January

Average price

$490

Good round-trip deal

$464 or less

Good one-way deal

$207 or less
From Washington to Ontario
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One-way flight from Washington to Ontario
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Highest demand for flights based on searches. 13% potential increase in price ($63 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($9 potential savings vs. average RT price).
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Average for round-trip flights in July 2025
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Price to beat on a round-trip flight from Washington to Ontario.
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Price to beat on a one-way flight from Washington to Ontario.
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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 July 30, 2025.

This iWofly deal was found by Cheapflights users on 7/29. 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 iWofly is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/121:15 pmSEA - YYZ
1 stop8h 16mWestJet
Fri 9/1912:00 pmYYZ - SEA
2 stops11h 29mWestJet
Deal found 7/29$243
This Flightnetwork deal was found by Cheapflights users on 7/28. 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 Flightnetwork is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/115:30 amSEA - YTZ
2 stops10h 15mAir Canada
Thu 9/184:10 pmYTZ - SEA
2 stops9h 06mAir Canada
Deal found 7/28$249
This Air Canada deal was found by Cheapflights users on 7/29. 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 9/307:15 amSEA - YYZ
1 stop8h 43mAir Canada
Mon 10/68:00 amYYZ - SEA
1 stop9h 16mAir Canada
Deal found 7/29$261
This Alaska Airlines deal was found by Cheapflights users on 7/30. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/97:16 amSEA - YYZ
Nonstop4h 44mAlaska Airlines
Tue 9/164:45 pmYYZ - SEA
Nonstop5h 23mAlaska Airlines
Deal found 7/30$269
This Air Canada deal was found by Cheapflights users on 7/29. 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.
Fri 9/267:40 pmPDX - YYZ
1 stop9h 19mAir Canada
Mon 9/298:30 amYYZ - PDX
1 stop9h 16mAir Canada
Deal found 7/29$277
This Trip.com deal was found by Cheapflights users on 7/28. 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.
Wed 8/271:50 pmSEA - YKF
1 stop7h 56mWestJet
Thu 8/286:00 amYKF - SEA
1 stop9h 58mWestJet
Deal found 7/28$278
This Air Canada deal was found by Cheapflights users on 7/29. 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.
Fri 9/127:40 pmPDX - YTZ
2 stops13h 05mAir Canada
Fri 9/194:10 pmYTZ - PDX
2 stops9h 51mAir Canada
Deal found 7/29$281
This Trip.com deal was found by Cheapflights users on 7/28. 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.
Tue 8/261:45 pmPDX - YYZ
1 stop7h 39mWestJet
Tue 9/28:00 amYYZ - PDX
1 stop7h 48mWestJet
Deal found 7/28$289
This Gotogate deal was found by Cheapflights users on 7/29. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/262:05 pmSEA - YHM
1 stop7h 36mWestJet
Tue 9/26:00 amYHM - SEA
1 stop9h 59mWestJet
Deal found 7/29$294
This Kiwi.com deal was found by Cheapflights users on 7/28. 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 9/1012:07 pmPDX - YYZ
2 stops15h 05mMultiple Airlines
Fri 9/129:30 amYYZ - PDX
1 stop12h 34mMultiple Airlines
Deal found 7/28$297
This Mytrip deal was found by Cheapflights users on 7/28. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/135:30 amSEA - YKF
2 stops21h 00mMultiple Airlines
Sun 9/216:15 amYKF - SEA
1 stop9h 18mMultiple Airlines
Deal found 7/28$308
This Trip.com deal was found by Cheapflights users on 7/28. 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.
Tue 9/21:45 pmPDX - YOW
1 stop14h 00mWestJet
Sat 9/206:00 amYOW - PDX
1 stop10h 05mWestJet
Deal found 7/28$319

Cheapflights Fare Finder

 
Customize your flight search to find flights from Washington to Ontario 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 July 30, 2025.
Use the filters below to find and compare flights from Washington to Ontario that are best for you.

Fly from

Washington

Fly to

Ontario

Route

Depart

Return

Price

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Fri 9/12

1:15 pm-12:31 am

1 stop8h 16m

Toronto Pearson Intl

Fri 9/19

12:00 pm-8:29 pm

2 stops11h 29m

$243

SeattleToronto

SEA - YTZ

SEAYTZ

Seattle/Tacoma Intl

Thu 9/11

5:30 am-6:45 pm

2 stops10h 15m

Toronto Island

Thu 9/18

4:10 pm-10:16 pm

2 stops9h 06m

$249

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Tue 9/30

7:15 am-6:58 pm

1 stop8h 43m

Toronto Pearson Intl

Mon 10/6

8:00 am-2:16 pm

1 stop9h 16m

$261

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Tue 9/9

7:16 am-3:00 pm

Nonstop4h 44m

Toronto Pearson Intl

Tue 9/16

4:45 pm-7:08 pm

Nonstop5h 23m

$269

PortlandToronto

PDX - YYZ

PDXYYZ

Portland

Fri 9/26

7:40 pm-7:59 am

1 stop9h 19m

Toronto Pearson Intl

Mon 9/29

8:30 am-2:46 pm

1 stop9h 16m

$277

SeattleToronto

SEA - YKF

SEAYKF

Seattle/Tacoma Intl

Wed 8/27

1:50 pm-12:46 am

1 stop7h 56m

Toronto Region of Waterloo Intl

Thu 8/28

6:00 am-12:58 pm

1 stop9h 58m

$278

PortlandToronto

PDX - YTZ

PDXYTZ

Portland

Fri 9/12

7:40 pm-11:45 am

2 stops13h 05m

Toronto Island

Fri 9/19

4:10 pm-11:01 pm

2 stops9h 51m

$281

PortlandToronto

PDX - YYZ

PDXYYZ

Portland

Tue 8/26

1:45 pm-12:24 am

1 stop7h 39m

Toronto Pearson Intl

Tue 9/2

8:00 am-12:48 pm

1 stop7h 48m

$289

SeattleHamilton

SEA - YHM

SEAYHM

Seattle/Tacoma Intl

Tue 8/26

2:05 pm-12:41 am

1 stop7h 36m

Hamilton

Tue 9/2

6:00 am-12:59 pm

1 stop9h 59m

$294

PortlandToronto

PDX - YYZ

PDXYYZ

Portland

Wed 9/10

12:07 pm-6:12 am

2 stops15h 05m

Toronto Pearson Intl

Fri 9/12

9:30 am-7:04 pm

1 stop12h 34m

$297

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/27

Showing 1-10 of 60 results
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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 $243). Flying from State of Washington to Region of Ontario in August is currently the most expensive (average of $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 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 July 30, 2025.

When flying from State of Washington to Region of Ontario, 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 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 July 30, 2025.

The most flights from USWA to CAON are scheduled on a Thursday (8 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (5 on average).

Reviews of airlines servicing Ontario

Get insights into the airlines that provide service to Ontario. 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 Ontario. Reviews last updated July 30, 2025.
Peruse reviews from past customers who have flown with Alaska Airlines, Delta, and United Airlines from Washington to Ontario 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
10,000 reviews

Entertainment

7.1

Food

7.1

Overall

8.0

Crew

8.5

Boarding

8.1

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.1

Food

7.1

Overall

8.0

Crew

8.5

Boarding

8.1

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
Delta
8.0
Very good
7,980 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.1

Food

7.1

Overall

8.0

Crew

8.5

Boarding

8.1

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
United Airlines
7.4
Good
8,896 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.1

Food

7.1

Overall

8.0

Crew

8.5

Boarding

8.1

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
American Airlines
7.2
Good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.1

Food

7.1

Overall

8.0

Crew

8.5

Boarding

8.1

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
WestJet
7.2
Good
2,975 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.1

Food

7.1

Overall

8.0

Crew

8.5

Boarding

8.1

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.

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?

    To fly one-way, consider booking your trip with WestJet, which is currently one of the cheapest options available, starting at $117. Air Canada flights start at $118 while deals on Alaska Airlines start at $133 one-way.

  • 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 $243). Flying from State of Washington to Region of Ontario in August is currently the most expensive (average of $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 Washington to Ontario

See prices for flight routes from nearby airports that may be better suited for you.
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Top 5 airlines flying from Washington to Ontario

Discover the top 5 airlines that operate flights from Washington to Ontario. 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 July 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapest$128Average$553FlexibilityNo cancel feeOn-time67%
United AirlinesCheapest$158Average$681FlexibilityNo cancel feeOn-time69%
DeltaCheapest$170Average$445FlexibilityNo cancel feeOn-timeN/A
WestJetCheapest$236Average$351FlexibilityNo cancel feeOn-time60%
Alaska AirlinesCheapest$273Average$490FlexibilityNo cancel feeOn-time75%

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