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Cheap flights from Washington to Ontario from C$ 124

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Washington to Ontario departing on 1/2. 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

Enter your travel dates to find the best prices.
WestJet Logo
3:10 p.m. - 6:13 a.m.
SEA
-
YYZ
12h 03m1 stop
WestJet Logo
1:30 p.m. - 8:28 p.m.
YYZ
-
SEA
9h 58m1 stop
C$ 339WestJet
Wed, 15 Apr - Fri, 8 May
Air Canada Logo
5:50 a.m. - 8:46 p.m.
SEA
-
YYZ
11h 56m2 stops
Air Canada Logo
7:50 p.m. - 10:16 p.m.
YYZ
-
SEA
5h 26mdirect
C$ 341Air Canada
Sun, 11 Jan - Sat, 17 Jan
Air Canada Logo
9:55 a.m. - 10:41 p.m.
SEA
-
YYZ
9h 46m2 stops
Air Canada Logo
10:35 p.m. - 9:15 a.m.
YYZ
-
SEA
13h 40m1 stop
C$ 342Air Canada
Mon, 19 Jan - Thu, 22 Jan
WestJet Logo
3:10 p.m. - 3:13 p.m.
SEA
-
YUL
21h 03m1 stop
WestJet Logo
6:45 a.m. - 1:08 p.m.
YUL
-
SEA
9h 23m1 stop
C$ 344WestJet
Thu, 16 Apr - Mon, 27 Apr
United Airlines Logo
8:10 a.m. - 6:57 p.m.
SEA
-
YYZ
7h 47m1 stop
United Airlines Logo
3:45 p.m. - 10:59 p.m.
YYZ
-
SEA
10h 14m1 stop
C$ 346United Airlines
Tue, 3 Feb - Tue, 10 Feb
Alaska Airlines Logo
7:55 a.m. - 3:35 p.m.
SEA
-
YYZ
4h 40mdirect
Alaska Airlines Logo
4:45 p.m. - 7:17 p.m.
YYZ
-
SEA
5h 32mdirect
C$ 352Alaska Airlines
Tue, 13 Jan - Wed, 21 Jan
Alaska Airlines Logo
5:45 a.m. - 3:35 p.m.
GEG
-
YYZ
6h 50m1 stop
Alaska Airlines Logo
4:45 p.m. - 12:23 a.m.
YYZ
-
GEG
10h 38m1 stop
C$ 468Alaska Airlines
Wed, 4 Feb - Wed, 11 Feb
United Airlines Logo
8:30 a.m. - 11:46 p.m.
GEG
-
YYZ
12h 16m2 stops
United Airlines Logo
3:30 p.m. - 9:50 p.m.
YYZ
-
GEG
9h 20m1 stop
C$ 477United Airlines
Wed, 4 Feb - Wed, 11 Feb
American Airlines Logo
10:15 p.m. - 1:45 p.m.
PDX
-
YUL
12h 30m1 stop
American Airlines Logo
7:00 a.m. - 8:24 p.m.
YUL
-
PDX
16h 24m1 stop
C$ 570American Airlines
Sun, 18 Jan - Sun, 25 Jan
American Airlines Logo
10:15 p.m. - 10:44 p.m.
PDX
-
YUL
21h 29m1 stop
American Airlines Logo
7:30 a.m. - 8:24 p.m.
YUL
-
PDX
15h 54m2 stops
C$ 584American Airlines
Sun, 18 Jan - Sun, 25 Jan

WestJet flights from State of Washington to Region of Ontario

Our best WestJet deals on State of Washington to Region of Ontario flight tickets
WestJet
15 Apr
SEA3:10 p.m.Seattle/Tacoma Intl
12h 03m
1 stop
YYZ6:13 a.m.Toronto Pearson Intl
8 May
YYZ1:30 p.m.Toronto Pearson Intl
9h 58m
1 stop
SEA8:28 p.m.Seattle/Tacoma Intl
C$ 339
Find similar
WestJet
16 Apr
SEA3:10 p.m.Seattle/Tacoma Intl
21h 03m
1 stop
YUL3:13 p.m.Montreal Pierre Elliott Trudeau Intl
27 Apr
YUL6:45 a.m.Montreal Pierre Elliott Trudeau Intl
9h 23m
1 stop
SEA1:08 p.m.Seattle/Tacoma Intl
C$ 344
Find similar
WestJet
18 Apr
SEA11:55 a.m.Seattle/Tacoma Intl
8h 43m
2 stops
YYZ11:38 p.m.Toronto Pearson Intl
9 May
YYZ8:00 a.m.Toronto Pearson Intl
8h 08m
1 stop
SEA1:08 p.m.Seattle/Tacoma Intl
C$ 349
Find similar

Air Canada flights from State of Washington to Region of Ontario

Our best Air Canada deals on State of Washington to Region of Ontario flight tickets
Air Canada
11 Jan
SEA8:10 a.m.Seattle/Tacoma Intl
4h 43m
YYZ3:53 p.m.Toronto Pearson Intl
18 Jan
YYZ7:50 p.m.Toronto Pearson Intl
5h 26m
SEA10:16 p.m.Seattle/Tacoma Intl
C$ 341
Find similar
Air Canada
19 Jan
SEA9:55 a.m.Seattle/Tacoma Intl
9h 46m
2 stops
YYZ10:41 p.m.Toronto Pearson Intl
22 Jan
YYZ10:35 p.m.Toronto Pearson Intl
13h 40m
1 stop
SEA9:15 a.m.Seattle/Tacoma Intl
C$ 342
Find similar
Air Canada
16 Jan
SEA5:50 a.m.Seattle/Tacoma Intl
11h 40m
2 stops
YYZ8:30 p.m.Toronto Pearson Intl
20 Jan
YYZ7:50 p.m.Toronto Pearson Intl
5h 26m
SEA10:16 p.m.Seattle/Tacoma Intl
C$ 345
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from State of Washington to Region of 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, momondo users made 96,600 searches. Data last updated 22 December 2025.
Use the filters below to find and compare flights from Washington to Ontario that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Wed 15/4

3:10 p.m.-6:13 a.m.

1 stop12h 03m

Toronto Pearson Intl

Fri 8/5

1:30 p.m.-8:28 p.m.

1 stop9h 58m

C$ 339

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Sun 11/1

5:50 a.m.-8:46 p.m.

2 stops11h 56m

Toronto Pearson Intl

Sat 17/1

7:50 p.m.-10:16 p.m.

Nonstop5h 26m

C$ 341

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Mon 19/1

9:55 a.m.-10:41 p.m.

2 stops9h 46m

Toronto Pearson Intl

Thu 22/1

10:35 p.m.-9:15 a.m.

1 stop13h 40m

C$ 342

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Thu 16/4

3:10 p.m.-3:13 p.m.

1 stop21h 03m

Montreal Pierre Elliott Trudeau Intl

Mon 27/4

6:45 a.m.-1:08 p.m.

1 stop9h 23m

C$ 344

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Tue 3/2

8:10 a.m.-6:57 p.m.

1 stop7h 47m

Toronto Pearson Intl

Tue 10/2

3:45 p.m.-10:59 p.m.

1 stop10h 14m

C$ 346

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Tue 13/1

7:55 a.m.-3:35 p.m.

Nonstop4h 40m

Toronto Pearson Intl

Wed 21/1

4:45 p.m.-7:17 p.m.

Nonstop5h 32m

C$ 352

SpokaneToronto

GEG - YYZ

GEGYYZ

Spokane

Wed 4/2

5:45 a.m.-3:35 p.m.

1 stop6h 50m

Toronto Pearson Intl

Wed 11/2

4:45 p.m.-12:23 a.m.

1 stop10h 38m

C$ 468

SpokaneToronto

GEG - YYZ

GEGYYZ

Spokane

Wed 4/2

8:30 a.m.-11:46 p.m.

2 stops12h 16m

Toronto Pearson Intl

Wed 11/2

3:30 p.m.-9:50 p.m.

1 stop9h 20m

C$ 477

PortlandMontreal

PDX - YUL

PDXYUL

Portland

Sun 18/1

10:15 p.m.-1:45 p.m.

1 stop12h 30m

Montreal Pierre Elliott Trudeau Intl

Sun 25/1

7:00 a.m.-8:24 p.m.

1 stop16h 24m

C$ 570

PortlandMontreal

PDX - YUL

PDXYUL

Portland

Sun 18/1

10:15 p.m.-10:44 p.m.

1 stop21h 29m

Montreal Pierre Elliott Trudeau Intl

Sun 25/1

7:30 a.m.-8:24 p.m.

2 stops15h 54m

C$ 584

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 Ontario from

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

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 Region of Ontario?

In general, November is the cheapest month to fly from State of Washington to Region of Ontario. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around C$ 378. If you are unable to visit Region of Ontario during the month of November, then departing from State of Washington during the month January is also very affordable. Most momondo users find prices during this month for around C$ 389.

What is the cheapest day to depart on your flight to Region of Ontario?

The cheapest day to depart from State of Washington to Region of Ontario is on a Wednesday. Travellers who choose to depart for Region of Ontario on a Wednesday will often find tickets for as low as C$ 535. The most expensive day to fly to Region of Ontario is Monday, with ticket prices averaging around C$ 972.

What is the cheapest time of day to depart on your flight to Region of Ontario?

Our most recent data shows that the best time of day to fly to Region of Ontario is in the afternoon. Flights from State of Washington to Region of Ontario during this time can be as low as C$ 492. If you have a flexible travel schedule, then try to avoid flying in the morning when prices are C$ 816 on average. Flights to Region of Ontario from State of Washington in the morning are generally more expensive because this time of day is more convenient for travellers’ schedules.

What is the cheapest Washington to Ontario flight route?

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

How far in advance should I book a flight to Region of Ontario?

You are more likely to see cheaper flights to Region of Ontario from State of Washington when booking weeks ahead of your departure date. In general, you can expect to find flights to Region of Ontario for around C$ 562 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Region of Ontario from State of Washington for as low as C$ 403 on momondo.

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

There are 3 cabin classes available to choose from on Washington to Ontario 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 State of Washington to Region of Ontario flights?

You could potentially save up to 7% on your flight if you consider stops on a State of Washington to Region of Ontario flight.

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

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

Best price found

C$ 241

Fastest flight time

4h 40m

Direct flights

Every day

Airports in Region of Ontario

123 airports
The best one-way flight to Region of Ontario from State of Washington in the past 72 hours is C$ 241. The best round-trip flight deal from State of Washington to Region of Ontario found on momondo in the last 72 hours is C$ 364.
The fastest flight from State of Washington to Region of Ontario takes 4h 40m
Direct flights go from State of Washington to Region of Ontario every day.
There are 123 airports in Region of Ontario. From State of Washington there are direct flights to Montreal Pierre Elliott Trudeau Intl (YUL), Toronto Pearson Intl (YYZ).
Search flight deals

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

    Prices for flights from Washington to Ontario are refreshed on a daily basis.

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

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

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Washington to Ontario.

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

    The necessary travel and health documents for your Ontario 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 State of Washington to Region of Ontario?

Best airlines flying from State of Washington to Region of Ontario

Compare and see reviews for airlines that fly from State of Washington to Region of Ontario with momondo
Airline
Rating
Free Cancellation
Price
WestJetPriceFrom C$ 285Free CancellationRating
7.2
3,209 reviews
Search WestJet flights
Air CanadaPriceFrom C$ 364Free CancellationRating
7.1
10,551 reviews
Search Air Canada flights
Alaska AirlinesPriceFrom C$ 375Free CancellationRating
8.0
11,496 reviews
Search Alaska Airlines flights
United AirlinesPriceFrom C$ 487Free CancellationRating
7.4
9,102 reviews
Search United Airlines flights

Why use momondo?

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

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Ontario from Washington.

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

Yes. momondo allows you to filter the results for Washington to Ontario flights to just show those with flexible booking policies.

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

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Ontario from Washington.

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

Of course. momondo tracks the price of Washington to Ontario flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

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Find better results for your trip to Ontario

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