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Cheap flights from Ontario to Washington from C$ 179

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 23/9. Fares are subject to change and may not be available on all flights or dates of travel.
YYZ — SEA
17 Jun — 24 Jun1
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 12 June 2025.

Round-trip from

C$ 294

One-way from

C$ 179

Popular in

July

Cheapest in

February

Average price

C$ 558

Good round-trip deal

C$ 553 or less

Good one-way deal

C$ 313 or less
WestJet
  • WestJet
  • 20/8-23/10
  • 2 total stops
  • 17h 48m total
  • Ontario to Washington
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WestJet
  • WestJet
  • 23/9
  • 1 total stop
  • 9h 59m total
  • Ontario to Washington
Search Deals
Highest demand for flights based on searches. 10% potential increase in price (C$ 76 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 June 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 12 June 2025.

Wed 20/86:00 a.m.YHM - SEA
1 stop9h 58mWestJet
Thu 23/101:50 p.m.SEA - YHM
1 stop7h 50mWestJet
Deal found 10/6C$ 294
Wed 23/76:10 a.m.YOW - PDX
2 stops9h 55mWestJet
Wed 30/71:45 p.m.PDX - YOW
2 stops12h 40mWestJet
Deal found 11/6C$ 302
Wed 27/88:00 a.m.YYZ - PDX
1 stop8h 05mWestJet
Mon 8/91:45 p.m.PDX - YYZ
1 stop7h 37mWestJet
Deal found 10/6C$ 310
Fri 25/76:00 p.m.YOW - PDX
1 stop8h 01mAir Canada
Fri 1/86:15 a.m.PDX - YOW
1 stop7h 01mAir Canada
Deal found 9/6C$ 340
Mon 7/710:50 p.m.YYZ - PDX
1 stop13h 40mAir Canada
Mon 14/77:40 p.m.PDX - YYZ
1 stop7h 55mAir Canada
Deal found 11/6C$ 343
Fri 15/89:00 a.m.YYZ - SEA
2 stops12h 38mWestJet
Sun 24/88:40 a.m.SEA - YYZ
1 stop7h 14mWestJet
Deal found 12/6C$ 347
Thu 28/87:45 p.m.YKF - SEA
2 stops19h 46mWestJet
Tue 2/97:05 a.m.SEA - YKF
1 stop8h 50mWestJet
Deal found 10/6C$ 350
Fri 12/96:15 a.m.YYZ - SEA
2 stops11h 01mAir Canada
Mon 22/97:15 p.m.SEA - YYZ
1 stop8h 45mAir Canada
Deal found 10/6C$ 355
Tue 26/87:20 p.m.YTZ - SEA
2 stops17h 01mAir Canada
Fri 5/97:15 a.m.SEA - YTZ
1 stop9h 34mAir Canada
Deal found 10/6C$ 364
Sat 16/84:45 p.m.YYZ - SEA
Nonstop5h 24mMultiple Airlines
Sat 30/87:05 a.m.SEA - YYZ
1 stop8h 49mMultiple Airlines
Deal found 11/6C$ 365
Thu 3/78:00 p.m.YYZ - PDX
1 stop15h 53mMultiple Airlines
Wed 9/77:40 p.m.PDX - YYZ
1 stop8h 50mMultiple Airlines
Deal found 11/6C$ 366
Sat 12/710:05 a.m.YYZ - SEA
1 stop17h 51mUnited Airlines
Tue 15/712:20 a.m.SEA - YYZ
1 stop12h 26mUnited Airlines
Deal found 9/6C$ 366

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 12 June 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

HamiltonSeattle

YHM - SEA

YHMSEA

Hamilton

Wed 20/8

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

1 stop9h 58m

Seattle/Tacoma Intl

Thu 23/10

1:50 p.m.-12:40 a.m.

1 stop7h 50m

C$ 294

OttawaPortland

YOW - PDX

YOWPDX

Ottawa

Wed 23/7

6:10 a.m.-1:05 p.m.

2 stops9h 55m

Portland

Wed 30/7

1:45 p.m.-5:25 a.m.

2 stops12h 40m

C$ 302

TorontoPortland

YYZ - PDX

YYZPDX

Toronto Pearson Intl

Wed 27/8

8:00 a.m.-1:05 p.m.

1 stop8h 05m

Portland

Mon 8/9

1:45 p.m.-12:22 a.m.

1 stop7h 37m

C$ 310

OttawaPortland

YOW - PDX

YOWPDX

Ottawa

Fri 25/7

6:00 p.m.-11:01 p.m.

1 stop8h 01m

Portland

Fri 1/8

6:15 a.m.-4:16 p.m.

1 stop7h 01m

C$ 340

TorontoPortland

YYZ - PDX

YYZPDX

Toronto Pearson Intl

Mon 7/7

10:50 p.m.-9:30 a.m.

1 stop13h 40m

Portland

Mon 14/7

7:40 p.m.-6:35 a.m.

1 stop7h 55m

C$ 343

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Fri 15/8

9:00 a.m.-6:38 p.m.

2 stops12h 38m

Seattle/Tacoma Intl

Sun 24/8

8:40 a.m.-6:54 p.m.

1 stop7h 14m

C$ 347

TorontoSeattle

YKF - SEA

YKFSEA

Toronto Region of Waterloo Intl

Thu 28/8

7:45 p.m.-12:31 p.m.

2 stops19h 46m

Seattle/Tacoma Intl

Fri 5/9

1:50 p.m.-12:45 a.m.

1 stop7h 55m

C$ 350

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Fri 12/9

6:15 a.m.-2:16 p.m.

2 stops11h 01m

Seattle/Tacoma Intl

Mon 22/9

7:15 p.m.-7:00 a.m.

1 stop8h 45m

C$ 355

TorontoSeattle

YTZ - SEA

YTZSEA

Toronto Island

Tue 26/8

7:20 p.m.-9:21 a.m.

2 stops17h 01m

Seattle/Tacoma Intl

Fri 5/9

7:15 a.m.-7:49 p.m.

1 stop9h 34m

C$ 364

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Sat 16/8

4:45 p.m.-7:09 p.m.

Nonstop5h 24m

Seattle/Tacoma Intl

Sat 30/8

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

1 stop8h 49m

C$ 365

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/6

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 12 June 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 12 June 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 (3 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 12 June 2025.
To help decide which airline to fly from Ontario to Washington, see what other customers have to say about Alaska Airlines, Delta and Hawaiian 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
Check prices

Food

7.1

Boarding

8.1

Comfort

7.8

Overall

8.0

Entertainment

7.1

Crew

8.5

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

Food

7.1

Boarding

8.1

Comfort

7.8

Overall

8.0

Entertainment

7.1

Crew

8.5

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
7,950 reviews
Alaska Airlines
8.0
Very good
10,000 reviews
Check prices

Food

7.1

Boarding

8.1

Comfort

7.8

Overall

8.0

Entertainment

7.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Hawaiian Airlines
7.9
Good
2,494 reviews
Alaska Airlines
8.0
Very good
10,000 reviews
Check prices

Food

7.1

Boarding

8.1

Comfort

7.8

Overall

8.0

Entertainment

7.1

Crew

8.5

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
8,790 reviews
Alaska Airlines
8.0
Very good
10,000 reviews
Check prices

Food

7.1

Boarding

8.1

Comfort

7.8

Overall

8.0

Entertainment

7.1

Crew

8.5

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
10,000 reviews
Check prices

Food

7.1

Boarding

8.1

Comfort

7.8

Overall

8.0

Entertainment

7.1

Crew

8.5

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$ 179 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 American Airlines, with prices starting from C$ 211 and C$ 212, 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 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 12 June 2025.
AirlineCheapestAverageFlexibilityOn-time
WestJetCheapestC$ 188AverageC$ 445FlexibilityNo cancel feeOn-time60%
Search WestJet flights
United AirlinesCheapestC$ 275AverageC$ 701FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Alaska AirlinesCheapestC$ 328AverageC$ 689FlexibilityNo cancel feeOn-time75%
Search Alaska Airlines flights
Air CanadaCheapestC$ 357AverageC$ 597FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
DeltaCheapestC$ 369AverageC$ 543FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
Hawaiian AirlinesCheapestC$ 407AverageC$ 459FlexibilityNo cancel feeOn-time85%
Search Hawaiian Airlines flights

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How does Cheapflights help users find flights from Ontario to Washington?

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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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