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Cheap flights from Ontario to Washington from C$ 196

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 23/4. Fares are subject to change and may not be available on all flights or dates of travel.
YYZ — SEA
14 Apr — 21 Apr1
1 adult
1 adult, Economy, 0 bags

Cheap 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 15 March 2026.

Wed 29/48:00 a.m.
YYZ
-
SEA
1 stop14h 20m
Air Canada
Wed 6/52:55 p.m.
SEA
-
YYZ
1 stop7h 43m
Air Canada
Deal found 15/3C$ 329
Wed 22/48:15 a.m.
YYZ
-
SEA
2 stops9h 50m
Air Canada
Thu 23/43:45 p.m.
SEA
-
YYZ
2 stops10h 44m
Air Canada
Deal found 12/3C$ 340
Sat 9/58:00 a.m.
YYZ
-
SEA
2 stops13h 30m
Air Canada
Tue 19/57:20 p.m.
SEA
-
YYZ
2 stops9h 50m
Air Canada
Deal found 13/3C$ 343
Thu 23/47:30 p.m.
YYZ
-
SEA
Nonstop5h 23m
Air Canada
Thu 30/410:20 a.m.
SEA
-
YYZ
1 stop8h 48m
Air Canada
Deal found 12/3C$ 353
Wed 6/512:30 a.m.
YYZ
-
SEA
2 stops12h 20m
Air Canada
Wed 20/57:20 p.m.
SEA
-
YYZ
2 stops11h 50m
Air Canada
Deal found 13/3C$ 355
Mon 13/410:35 p.m.
YYZ
-
SEA
1 stop14h 03m
Air Canada
Tue 21/48:00 a.m.
SEA
-
YYZ
Nonstop4h 54m
Air Canada
Deal found 11/3C$ 357
Thu 23/47:30 p.m.
YYZ
-
SEA
Nonstop5h 23m
Air Canada
Wed 6/52:55 p.m.
SEA
-
YYZ
1 stop7h 43m
Air Canada
Deal found 14/3C$ 359
Sat 9/58:00 a.m.
YYZ
-
SEA
2 stops13h 30m
Air Canada
Wed 20/57:20 p.m.
SEA
-
YYZ
1 stop15h 33m
Air Canada
Deal found 13/3C$ 362
Wed 8/41:00 p.m.
YYZ
-
SEA
1 stop9h 00m
United Airlines
Wed 22/47:00 a.m.
SEA
-
YYZ
1 stop7h 56m
United Airlines
Deal found 10/3C$ 364
Sun 19/47:45 a.m.
YYZ
-
SEA
1 stop9h 34m
WestJet
Thu 23/43:10 p.m.
SEA
-
YYZ
2 stops11h 48m
WestJet
Deal found 12/3C$ 366
Mon 8/610:25 p.m.
YYZ
-
PDX
1 stop14h 05m
Air Canada
Sat 20/67:45 p.m.
PDX
-
YYZ
2 stops9h 23m
Air Canada
Deal found 10/3C$ 368
Sat 25/47:30 a.m.
YUL
-
SEA
1 stop10h 01m
WestJet
Sat 2/57:35 p.m.
SEA
-
YUL
1 stop8h 30m
WestJet
Deal found 11/3C$ 376

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 15 March 2026.

Round-trip from

C$ 329

One-way from

C$ 196

Popular in

June

Cheapest in

February

Average price

C$ 457

Good round-trip deal

C$ 405 or less

Good one-way deal

C$ 283 or less
Air Canada
  • Air Canada
  • 29/4-6/5
  • 2 total stops
  • 22h 03m total
  • Ontario to Washington
Search Deals
Air Canada
  • Air Canada
  • 23/4
  • Nonstop
  • 5h 23m total
  • Ontario to Washington
Search Deals
Highest demand for flights based on searches. 4% potential increase in price (C$ 33 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease (C$ 13 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 2026
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 629,999 searches. Data last updated 15 March 2026.
Use the filters below to find and compare flights from Ontario to Washington that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Sat 25/4

7:00 a.m.-6:35 p.m.

2 stops14h 35m

Seattle/Tacoma Intl

Tue 28/4

7:37 p.m.-7:00 a.m.

1 stop8h 23m

C$ 372

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Tue 5/5

8:50 a.m.-7:00 p.m.

1 stop13h 10m

Seattle/Tacoma Intl

Wed 13/5

10:53 p.m.-11:49 a.m.

1 stop9h 56m

C$ 373

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Sat 23/5

5:16 p.m.-11:19 p.m.

1 stop9h 03m

Seattle/Tacoma Intl

Sat 30/5

5:00 a.m.-9:32 p.m.

1 stop13h 32m

C$ 381

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Sun 26/4

2:15 p.m.-9:50 p.m.

1 stop10h 35m

Seattle/Tacoma Intl

Sun 3/5

11:59 p.m.-11:31 a.m.

1 stop8h 32m

C$ 384

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Mon 4/5

5:20 p.m.-11:59 p.m.

1 stop9h 39m

Seattle/Tacoma Intl

Thu 7/5

11:53 p.m.-11:49 a.m.

1 stop8h 56m

C$ 396

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Fri 17/4

2:15 p.m.-9:50 p.m.

1 stop10h 35m

Seattle/Tacoma Intl

Mon 20/4

11:10 a.m.-9:59 p.m.

1 stop7h 49m

C$ 402

TorontoPortland

YYZ - PDX

YYZPDX

Toronto Pearson Intl

Mon 20/4

2:15 p.m.-9:42 p.m.

1 stop10h 27m

Portland

Mon 27/4

11:15 p.m.-1:24 p.m.

1 stop11h 09m

C$ 406

TorontoPortland

YYZ - PDX

YYZPDX

Toronto Pearson Intl

Tue 14/4

8:50 a.m.-10:34 p.m.

1 stop16h 44m

Portland

Wed 15/4

11:15 p.m.-11:43 a.m.

1 stop9h 28m

C$ 410

TorontoPortland

YYZ - PDX

YYZPDX

Toronto Pearson Intl

Sat 2/5

1:00 p.m.-6:45 p.m.

1 stop8h 45m

Portland

Sat 9/5

11:55 p.m.-11:49 a.m.

1 stop8h 54m

C$ 416

TorontoPortland

YYZ - PDX

YYZPDX

Toronto Pearson Intl

Thu 30/4

5:20 p.m.-11:59 p.m.

1 stop9h 39m

Portland

Tue 5/5

11:55 p.m.-9:54 a.m.

1 stop6h 59m

C$ 416

Flights are sorted by cheapest round-trip flights first.

Deals found on 14/3

Showing 1-10 of 60 resultsSorted by cheapest first
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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$ 180). Flying from Region of Ontario to State of Washington in July is currently the most expensive (average of C$ 324). 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 15 March 2026.

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.

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 15 March 2026.

The most flights from CAON to USWA are scheduled on a Monday (4 on average). You will have fewer flight options on Tuesday, 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 15 March 2026.
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
7.9
Good
12,052 reviews
Check prices

Crew

8.5

Boarding

8.1

Comfort

7.8

Entertainment

7.0

Overall

7.9

Food

7.1

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
7.9
Good
12,052 reviews
Alaska Airlines
7.9
Good
12,052 reviews
Check prices

Crew

8.5

Boarding

8.1

Comfort

7.8

Entertainment

7.0

Overall

7.9

Food

7.1

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
8,292 reviews
Alaska Airlines
7.9
Good
12,052 reviews
Check prices

Crew

8.5

Boarding

8.1

Comfort

7.8

Entertainment

7.0

Overall

7.9

Food

7.1

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
9,428 reviews
Alaska Airlines
7.9
Good
12,052 reviews
Check prices

Crew

8.5

Boarding

8.1

Comfort

7.8

Entertainment

7.0

Overall

7.9

Food

7.1

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
3,295 reviews
Alaska Airlines
7.9
Good
12,052 reviews
Check prices

Crew

8.5

Boarding

8.1

Comfort

7.8

Entertainment

7.0

Overall

7.9

Food

7.1

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
10,801 reviews
Alaska Airlines
7.9
Good
12,052 reviews
Check prices

Crew

8.5

Boarding

8.1

Comfort

7.8

Entertainment

7.0

Overall

7.9

Food

7.1

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?

    For as low as C$ 384, United Airlines can have you in State of Washington from Region of Ontario in 10h 35m. 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$ 120 is the cheapest one-way deal found within the past few days, from WestJet. You may also be able to find cheap deals on Delta and Alaska Airlines, with prices starting from C$ 152 and C$ 168, 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$ 180). Flying from Region of Ontario to State of Washington in July is currently the most expensive (average of C$ 324). 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 15 March 2026.
AirlineCheapestAverageFlexibilityOn-time
WestJetCheapestC$ 127AverageC$ 404FlexibilityNo cancel feeOn-time60%
Search WestJet flights
DeltaCheapestC$ 252AverageC$ 532FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
United AirlinesCheapestC$ 263AverageC$ 535FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Alaska AirlinesCheapestC$ 272AverageC$ 448FlexibilityNo cancel feeOn-time75%
Search Alaska Airlines flights
Air CanadaCheapestC$ 310AverageC$ 543FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
Hawaiian AirlinesCheapestC$ 408AverageC$ 460FlexibilityNo 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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