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Cheap flights from Ontario to Washington from C$ 182

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Ontario to Washington departing on 20/10. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Cheap round-trip flights

WestJet Logo
6:00 a.m. - 12:59 p.m.YHM-SEA
9h 59m1 stop
WestJet Logo
2:05 p.m. - 12:40 a.m.SEA-YHM
7h 35m1 stop
C$ 276WestJet
Find Deal
Tue, 16 Sep - Tue, 23 Sep
WestJet Logo
6:00 a.m. - 12:59 p.m.YHM-SEA
9h 59m1 stop
WestJet Logo
2:05 p.m. - 12:40 a.m.SEA-YHM
7h 35m1 stop
C$ 282WestJet
Find Deal
Tue, 16 Sep - Tue, 23 Sep
Air Canada Logo
12:25 p.m. - 7:31 p.m.YTZ-SEA
10h 06m1 stop
Air Canada Logo
7:15 a.m. - 7:49 p.m.SEA-YTZ
9h 34m1 stop
C$ 318Air Canada
Find Deal
Tue, 30 Sep - Tue, 7 Oct
Air Canada Logo
10:20 a.m. - 7:31 p.m.YTZ-SEA
12h 11m2 stops
Air Canada Logo
5:30 a.m. - 8:41 p.m.SEA-YTZ
12h 11m2 stops
C$ 323Air Canada
Find Deal
Tue, 30 Sep - Tue, 7 Oct
Alaska Airlines Logo
4:45 p.m. - 7:08 p.m.YYZ-SEA
5h 23mdirect
Alaska Airlines Logo
7:16 a.m. - 3:00 p.m.SEA-YYZ
4h 44mdirect
C$ 336Alaska Airlines
Find Deal
Tue, 16 Sep - Wed, 24 Sep
Alaska Airlines Logo
4:45 p.m. - 7:08 p.m.YYZ-SEA
5h 23mdirect
Alaska Airlines Logo
7:16 a.m. - 3:00 p.m.SEA-YYZ
4h 44mdirect
C$ 347Alaska Airlines
Find Deal
Thu, 18 Sep - Tue, 23 Sep
United Airlines Logo
2:45 p.m. - 10:30 p.m.YYZ-PDX
10h 45m1 stop
United Airlines Logo
11:59 p.m. - 1:42 p.m.PDX-YYZ
10h 43m1 stop
C$ 403United Airlines
Find Deal
Tue, 30 Sep - Sun, 5 Oct
United Airlines Logo
3:00 p.m. - 9:29 p.m.YYZ-PDX
9h 29m1 stop
United Airlines Logo
5:00 a.m. - 7:37 p.m.PDX-YYZ
11h 37m2 stops
C$ 406United Airlines
Find Deal
Sat, 13 Sep - Tue, 23 Sep
Delta Logo
6:04 a.m. - 12:00 p.m.YYZ-PDX
8h 56m1 stop
Delta Logo
12:45 a.m. - 11:38 a.m.PDX-YYZ
7h 53m1 stop
C$ 441Delta
Find Deal
Wed, 3 Sep - Wed, 1 Oct
Delta Logo
6:13 p.m. - 11:52 p.m.YYZ-PDX
8h 39m2 stops
Delta Logo
12:40 a.m. - 11:47 a.m.PDX-YYZ
8h 07m1 stop
C$ 449Delta
Find Deal
Wed, 1 Oct - Tue, 7 Oct

Alaska Airlines flights from Region of Ontario to State of Washington

Our best Alaska Airlines deals on Region of Ontario to State of Washington flight tickets
Alaska Airlines
16 Sep
YYZ4:45 p.m.Toronto Pearson Intl
5h 23m
SEA7:08 p.m.Seattle/Tacoma Intl
24 Sep
SEA7:16 a.m.Seattle/Tacoma Intl
4h 44m
YYZ3:00 p.m.Toronto Pearson Intl
C$ 336
Find similar
Alaska Airlines
18 Sep
YYZ4:45 p.m.Toronto Pearson Intl
5h 23m
SEA7:08 p.m.Seattle/Tacoma Intl
23 Sep
SEA7:16 a.m.Seattle/Tacoma Intl
4h 44m
YYZ3:00 p.m.Toronto Pearson Intl
C$ 347
Find similar
Alaska Airlines
24 Oct
YYZ4:45 p.m.Toronto Pearson Intl
5h 23m
SEA7:08 p.m.Seattle/Tacoma Intl
2 Nov
SEA7:55 a.m.Seattle/Tacoma Intl
4h 40m
YYZ3:35 p.m.Toronto Pearson Intl
C$ 358
Find similar

Air Canada flights from Region of Ontario to State of Washington

Our best Air Canada deals on Region of Ontario to State of Washington flight tickets
Air Canada
30 Sep
YTZ12:25 p.m.Toronto Island
10h 06m
1 stop
SEA7:31 p.m.Seattle/Tacoma Intl
7 Oct
SEA7:15 a.m.Seattle/Tacoma Intl
9h 34m
1 stop
YTZ7:49 p.m.Toronto Island
C$ 318
Find similar
Air Canada
30 Sep
YTZ10:20 a.m.Toronto Island
12h 11m
2 stops
SEA7:31 p.m.Seattle/Tacoma Intl
7 Oct
SEA5:30 a.m.Seattle/Tacoma Intl
12h 11m
2 stops
YTZ8:41 p.m.Toronto Island
C$ 323
Find similar
Air Canada
30 Sep
YTZ12:25 p.m.Toronto Island
10h 06m
1 stop
SEA7:31 p.m.Seattle/Tacoma Intl
7 Oct
SEA7:15 a.m.Seattle/Tacoma Intl
9h 34m
1 stop
YTZ7:49 p.m.Toronto Island
C$ 329
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Region of Ontario to State of 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, momondo users made 96,600 searches. Data last updated 18 August 2025.
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

HamiltonSeattle

YHM - SEA

YHMSEA

Hamilton

Tue 16/9

6:00 a.m.-12:59 p.m.

1 stop9h 59m

Seattle/Tacoma Intl

Tue 23/9

2:05 p.m.-12:40 a.m.

1 stop7h 35m

C$ 276

HamiltonSeattle

YHM - SEA

YHMSEA

Hamilton

Tue 16/9

6:00 a.m.-12:59 p.m.

1 stop9h 59m

Seattle/Tacoma Intl

Tue 23/9

2:05 p.m.-12:40 a.m.

1 stop7h 35m

C$ 282

TorontoSeattle

YTZ - SEA

YTZSEA

Toronto Island

Tue 30/9

12:25 p.m.-7:31 p.m.

1 stop10h 06m

Seattle/Tacoma Intl

Tue 7/10

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

1 stop9h 34m

C$ 318

TorontoSeattle

YTZ - SEA

YTZSEA

Toronto Island

Tue 30/9

10:20 a.m.-7:31 p.m.

2 stops12h 11m

Seattle/Tacoma Intl

Tue 7/10

5:30 a.m.-8:41 p.m.

2 stops12h 11m

C$ 323

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Tue 16/9

4:45 p.m.-7:08 p.m.

Nonstop5h 23m

Seattle/Tacoma Intl

Wed 24/9

7:16 a.m.-3:00 p.m.

Nonstop4h 44m

C$ 336

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Thu 18/9

4:45 p.m.-7:08 p.m.

Nonstop5h 23m

Seattle/Tacoma Intl

Tue 23/9

7:16 a.m.-3:00 p.m.

Nonstop4h 44m

C$ 347

TorontoPortland

YYZ - PDX

YYZPDX

Toronto Pearson Intl

Tue 30/9

2:45 p.m.-10:30 p.m.

1 stop10h 45m

Portland

Sun 5/10

11:59 p.m.-1:42 p.m.

1 stop10h 43m

C$ 403

TorontoPortland

YYZ - PDX

YYZPDX

Toronto Pearson Intl

Sat 13/9

3:00 p.m.-9:29 p.m.

1 stop9h 29m

Portland

Tue 23/9

5:00 a.m.-7:37 p.m.

2 stops11h 37m

C$ 406

TorontoPortland

YYZ - PDX

YYZPDX

Toronto Pearson Intl

Wed 3/9

6:04 a.m.-12:00 p.m.

1 stop8h 56m

Portland

Wed 1/10

12:45 a.m.-11:38 a.m.

1 stop7h 53m

C$ 441

TorontoPortland

YYZ - PDX

YYZPDX

Toronto Pearson Intl

Wed 1/10

6:13 p.m.-11:52 p.m.

2 stops8h 39m

Portland

Tue 7/10

12:40 a.m.-11:47 a.m.

1 stop8h 07m

C$ 449

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Washington from

How to get the cheapest flight ticket from Region of Ontario to State of Washington

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to State of Washington?

In general, February is the cheapest month to fly from Region of Ontario to State of Washington. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around C$ 363. If you’re not able to fly to State of Washington in February, then January is your next best option. Flight prices from Region of Ontario to State of Washington during January average around C$ 368.

What is the cheapest day to depart on your flight to State of Washington?

On average, the least expensive day to fly to State of Washington from Region of Ontario is on a Thursday. momondo users have found tickets for Thursday departures for as low as C$ 561. However, this price may fluctuate depending on the airline, the season, and holidays. Be sure to avoid booking your departure on a Sunday as prices are generally higher than usual. According to our data, the average ticket price to State of Washington on Sunday is C$ 736.

What is the cheapest time of day to depart on your flight to State of Washington?

According to our data, the cheapest time of day to fly to State of Washington is in the evening. momondo users have found flights departing from Region of Ontario to State of Washington in the evening for as low as C$ 477. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. If you have a flexible travel schedule, then try to avoid flying in the morning when prices are C$ 827 on average. Flights to State of Washington from Region of Ontario in the morning are generally more expensive because this time of day is more convenient for travellers’ schedules.

What is the cheapest Ontario to Washington flight route?

Fly from Toronto Pearson Intl to Seattle/Tacoma Intl for the best Ontario - Washington flight prices

How far in advance should I book a flight to State of Washington?

You are more likely to see cheaper flights to State of Washington from Region of Ontario when booking weeks ahead of your departure date. In general, you can expect to find flights to State of Washington for around C$ 498 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to State of Washington from Region of Ontario for as low as C$ 419 on momondo.

What cabin class options are available on Ontario to Washington flights?

There are 4 cabin classes available to choose from on Ontario to Washington flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on Region of Ontario to State of Washington flights?

You could potentially save up to 21% on your flight if you consider stops on a Region of Ontario to State of Washington flight.

Cheap Region of Ontario to State of Washington flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Region of Ontario to State of Washington

Best price found

C$ 182

Fastest flight time

5h 15m

Direct flights

Every day

Airports in State of Washington

2 airports
The best one-way flight to State of Washington from Region of Ontario in the past 72 hours is C$ 182. The best round-trip flight deal from Region of Ontario to State of Washington found on momondo in the last 72 hours is C$ 276.
The fastest flight from Region of Ontario to State of Washington takes 5h 15m
Direct flights go from Region of Ontario to State of Washington every day.
There are 2 airports near State of Washington: Portland (PDX), Seattle/Tacoma Intl (SEA)
Search flight deals

  • When did momondo last update prices for flights from Ontario to Washington?

    Prices for flights from Ontario to Washington are updated daily.

  • How many operators does momondo search for flights from Ontario to Washington?

  • How old do you have to be to fly from Ontario to Washington?

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Ontario to Washington.

  • What documentation or ID do you need to fly to Washington?

    The necessary travel and health documents for your Washington trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

  • What is the most popular plane model from Region of Ontario to State of Washington?

Best airlines flying from Region of Ontario to State of Washington

Compare and see reviews for airlines that fly from Region of Ontario to State of Washington with momondo
Airline
Rating
Free Cancellation
Price
WestJetPriceFrom C$ 183Free CancellationRating
7.2
3,018 reviews
Search WestJet flights
United AirlinesPriceFrom C$ 278Free CancellationRating
7.4
8,925 reviews
Search United Airlines flights
Alaska AirlinesPriceFrom C$ 328Free CancellationRating
8.0
10,000 reviews
Search Alaska Airlines flights
Air CanadaPriceFrom C$ 339Free CancellationRating
7.1
9,992 reviews
Search Air Canada flights
DeltaPriceFrom C$ 373Free CancellationRating
8.0
7,981 reviews
Search Delta flights
Hawaiian AirlinesPriceFrom C$ 411Free CancellationRating
7.8
2,664 reviews
Search Hawaiian Airlines flights

Why use momondo?

Why should I use momondo to find a flight deal from Ontario to Washington?

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Ontario to Washington. momondo saves you time and could save you money on your trip.

Can I find flights from Ontario to Washington with flexible booking policies on momondo?

Yes. All flights to Washington from Ontario on momondo can be compared and filtered by various policies on offer, including flexible booking.

How can momondo help me find flights from Ontario to Washington?

momondo provides multiple filters to help you find the best flight to Washington from Ontario. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

I’m not ready to book a flight from Ontario to Washington right now. Can momondo alert me if prices change?

Price alerts on flights to Washington from Ontario are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

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