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Cheap flights from Ontario to Washington from C$ 138

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 2/7. Fares are subject to change and may not be available on all flights or dates of travel.
YYZ — SEA
5 May — 12 May1
1 adult

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 April 2025.

Round-trip from

C$ 263

One-way from

C$ 138

Popular in

July

Cheapest in

February

Average price

C$ 548

Good round-trip deal

C$ 426 or less

Good one-way deal

C$ 300 or less
WestJet
  • WestJet
  • 10/7-17/7
  • 2 total stops
  • 17h 48m total
  • Ontario to Washington
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WestJet
  • WestJet
  • 2/7
  • 1 total stop
  • 9h 52m total
  • Ontario to Washington
Search Deals
Highest demand for flights based on searches. 10% potential increase in price (C$ 82 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease (C$ 14 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 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.
Search Deals

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 30 April 2025.

Thu 10/76:00 a.m.YHM - PDX
1 stop9h 52mWestJet
Thu 17/71:45 p.m.PDX - YHM
1 stop7h 56mWestJet
Deal found 29/4C$ 263
Tue 27/56:00 a.m.YHM - SEA
1 stop9h 58mWestJet
Tue 3/62:05 p.m.SEA - YHM
1 stop7h 36mWestJet
Deal found 29/4C$ 305
Tue 13/56:00 a.m.YKF - SEA
1 stop9h 58mWestJet
Wed 21/58:25 a.m.SEA - YKF
1 stop13h 21mWestJet
Deal found 29/4C$ 324
Wed 9/78:00 a.m.YYZ - PDX
1 stop7h 52mWestJet
Tue 15/71:45 p.m.PDX - YYZ
1 stop7h 39mWestJet
Deal found 29/4C$ 370
Tue 3/68:00 a.m.YYZ - SEA
1 stop7h 58mWestJet
Mon 9/67:05 a.m.SEA - YYZ
1 stop8h 49mWestJet
Deal found 29/4C$ 379
Wed 4/612:10 p.m.YYZ - SEA
1 stop13h 33mDelta
Sun 8/65:55 a.m.SEA - YYZ
1 stop8h 20mDelta
Deal found 29/4C$ 385
Tue 27/59:45 a.m.YYZ - SEA
1 stop29h 01mMultiple Airlines
Tue 3/63:20 p.m.SEA - YYZ
1 stop12h 00mMultiple Airlines
Deal found 29/4C$ 392
Wed 21/54:45 p.m.YYZ - SEA
Nonstop5h 19mAlaska Airlines
Tue 3/67:23 a.m.SEA - YYZ
Nonstop4h 37mAlaska Airlines
Deal found 29/4C$ 393
Thu 5/66:15 a.m.YYZ - SEA
2 stops10h 58mAir Canada
Wed 11/62:55 p.m.SEA - YYZ
2 stops11h 55mAir Canada
Deal found 29/4C$ 396
Mon 12/59:00 p.m.YYZ - PDX
1 stop17h 44mAir Canada
Tue 13/52:14 p.m.PDX - YYZ
1 stop16h 44mAir Canada
Deal found 28/4C$ 404
Wed 28/56:00 a.m.YOW - SEA
1 stop9h 58mWestJet
Wed 11/67:05 a.m.SEA - YOW
1 stop8h 16mWestJet
Deal found 28/4C$ 408
Mon 12/512:00 p.m.YYZ - PDX
2 stops12h 06mUnited Airlines
Mon 12/511:59 p.m.PDX - YYZ
1 stop9h 16mUnited Airlines
Deal found 28/4C$ 410

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 April 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

HamiltonPortland

YHM - PDX

YHMPDX

Hamilton

Thu 10/7

6:00 a.m.-12:52 p.m.

1 stop9h 52m

Portland

Thu 17/7

1:45 p.m.-12:41 a.m.

1 stop7h 56m

C$ 263

HamiltonSeattle

YHM - SEA

YHMSEA

Hamilton

Tue 27/5

6:00 a.m.-12:58 p.m.

1 stop9h 58m

Seattle/Tacoma Intl

Tue 3/6

2:05 p.m.-12:41 a.m.

1 stop7h 36m

C$ 305

TorontoSeattle

YKF - SEA

YKFSEA

Toronto Region of Waterloo Intl

Tue 13/5

6:00 a.m.-12:58 p.m.

1 stop9h 58m

Seattle/Tacoma Intl

Wed 21/5

8:25 a.m.-12:46 a.m.

1 stop13h 21m

C$ 324

TorontoPortland

YYZ - PDX

YYZPDX

Toronto Pearson Intl

Wed 9/7

8:00 a.m.-12:52 p.m.

1 stop7h 52m

Portland

Tue 15/7

1:45 p.m.-12:24 a.m.

1 stop7h 39m

C$ 370

TorontoPortland

YYZ - PDX

YYZPDX

Toronto Pearson Intl

Wed 28/5

2:10 p.m.-10:54 p.m.

1 stop11h 44m

Portland

Wed 4/6

10:55 a.m.-11:58 p.m.

2 stops10h 03m

C$ 375

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Tue 3/6

8:00 a.m.-12:58 p.m.

1 stop7h 58m

Seattle/Tacoma Intl

Mon 9/6

7:05 a.m.-6:54 p.m.

1 stop8h 49m

C$ 379

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Wed 4/6

12:10 p.m.-10:43 p.m.

1 stop13h 33m

Seattle/Tacoma Intl

Sun 8/6

5:55 a.m.-5:15 p.m.

1 stop8h 20m

C$ 385

TorontoPortland

YYZ - PDX

YYZPDX

Toronto Pearson Intl

Mon 19/5

6:30 a.m.-10:24 a.m.

1 stop6h 54m

Portland

Mon 2/6

11:49 p.m.-12:30 p.m.

1 stop9h 41m

C$ 388

TorontoPortland

YYZ - PDX

YYZPDX

Toronto Pearson Intl

Sat 26/7

6:15 a.m.-2:45 p.m.

2 stops11h 30m

Portland

Mon 4/8

11:59 p.m.-9:58 a.m.

1 stop6h 59m

C$ 390

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Tue 27/5

9:45 a.m.-11:46 a.m.

1 stop29h 01m

Seattle/Tacoma Intl

Tue 3/6

3:20 p.m.-6:20 a.m.

1 stop12h 00m

C$ 392

Flights are sorted by cheapest round-trip flights first.

Deals found on 29/4

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 C$ 261). Flying from Region of Ontario to State of Washington in December is currently the most expensive (average of C$ 353). 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 April 2025.

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 30 April 2025.

The most flights from CAON to USWA are scheduled on a Monday (5 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (1 on average).

Rainfall in Washington by month

Plan your trip to Washington by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in State of Washington ranges from 18.0 - 168.0 mm per month. November is typically the wettest month, when rainfall can reach 168.0 mm. July is typically the driest time to visit State of Washington when rainfall is around 18.0 mm.

Temperature in Washington by month

Plan your trip to Washington by taking into account the average temperature totals by month.

If weather is an important factor for your trip to State of Washington, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 19.0 C. Travellers hoping to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 5.0 C).

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 April 2025.
To help decide which airline to fly from Ontario to Washington, see what other customers have to say about Alaska Airlines, Delta and Aeromexico. 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
9,968 reviews
Check prices

Entertainment

7.1

Boarding

8.2

Overall

8.0

Crew

8.5

Food

7.1

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Alaska Airlines
8.0
Very good
9,968 reviews
Alaska Airlines
8.0
Very good
9,968 reviews
Check prices

Entertainment

7.1

Boarding

8.2

Overall

8.0

Crew

8.5

Food

7.1

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Delta
8.0
Very good
7,936 reviews
Alaska Airlines
8.0
Very good
9,968 reviews
Check prices

Entertainment

7.1

Boarding

8.2

Overall

8.0

Crew

8.5

Food

7.1

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Aeromexico
7.5
Good
1,698 reviews
Alaska Airlines
8.0
Very good
9,968 reviews
Check prices

Entertainment

7.1

Boarding

8.2

Overall

8.0

Crew

8.5

Food

7.1

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
United Airlines
7.4
Good
8,696 reviews
Alaska Airlines
8.0
Very good
9,968 reviews
Check prices

Entertainment

7.1

Boarding

8.2

Overall

8.0

Crew

8.5

Food

7.1

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
American Airlines
7.2
Good
10,000 reviews
Alaska Airlines
8.0
Very good
9,968 reviews
Check prices

Entertainment

7.1

Boarding

8.2

Overall

8.0

Crew

8.5

Food

7.1

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

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.

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

    C$ 138 is the cheapest one-way deal found within the past few days, from WestJet. You may also be able to find cheap deals on Air Canada and Delta, with prices starting from C$ 238 and C$ 244, 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$ 261). Flying from Region of Ontario to State of Washington in December is currently the most expensive (average of C$ 353). 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 7 airlines flying from Ontario to Washington

Discover the top 7 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 April 2025.
AirlineCheapestAverageFlexibilityOn-time
WestJetCheapestC$ 183AverageC$ 462FlexibilityNo cancel feeOn-time60%
Search WestJet flights
United AirlinesCheapestC$ 278AverageC$ 728FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Alaska AirlinesCheapestC$ 331AverageC$ 696FlexibilityNo cancel feeOn-time75%
Search Alaska Airlines flights
Air CanadaCheapestC$ 339AverageC$ 670FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
DeltaCheapestC$ 375AverageC$ 570FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
Hawaiian AirlinesCheapestC$ 412AverageC$ 412FlexibilityNo cancel feeOn-time85%
Search Hawaiian Airlines flights
American AirlinesCheapestC$ 429AverageC$ 552FlexibilityNo cancel feeOn-time71%
Search American Airlines flights

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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.

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