Latest deals
Insights
FAQs
Reviews
Price Alerts

Cheap flights from Washington to Ontario from C$ 126

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 25/1. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult

Discover deals from 900+ travel sites with momondo.

Save money when you book flights with momondo

Big names, great deals

Big names, great deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Early arrival? Instantly customize your results

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

Find the cheapest flights from Washington to Ontario

Cheap round-trip flights

Enter your travel dates to find the best prices.
Alaska Airlines Logo
7:55 a.m. - 3:35 p.m.SEA-YYZ
4h 40mdirect
Alaska Airlines Logo
4:45 p.m. - 7:05 p.m.YYZ-SEA
5h 20mdirect
C$ 354Alaska Airlines
Find Deal
Tue, 3 Feb - Tue, 3 Mar
Multiple Airlines Logo
7:55 a.m. - 3:35 p.m.SEA-YYZ
4h 40mdirect
Multiple Airlines Logo
7:45 a.m. - 2:20 p.m.YYZ-SEA
9h 35m1 stop
C$ 356Multiple Airlines
Find Deal
Wed, 3 Dec - Wed, 10 Dec
WestJet Logo
3:10 p.m. - 5:58 a.m.SEA-YYZ
11h 48m2 stops
WestJet Logo
8:45 p.m. - 10:22 a.m.YYZ-SEA
16h 37m1 stop
C$ 360WestJet
Find Deal
Thu, 4 Dec - Thu, 11 Dec
WestJet Logo
3:10 p.m. - 12:23 p.m.SEA-YYZ
18h 13m2 stops
WestJet Logo
7:45 a.m. - 2:20 p.m.YYZ-SEA
9h 35m1 stop
C$ 363WestJet
Find Deal
Tue, 25 Nov - Tue, 2 Dec
Air Canada Logo
3:15 p.m. - 5:38 a.m.PDX-YYZ
11h 23m2 stops
Air Canada Logo
8:00 a.m. - 6:30 p.m.YYZ-PDX
13h 30m2 stops
C$ 370Air Canada
Find Deal
Mon, 26 Jan - Tue, 3 Feb
Air Canada Logo
8:10 a.m. - 3:53 p.m.SEA-YYZ
4h 43mdirect
Air Canada Logo
7:50 p.m. - 10:16 p.m.YYZ-SEA
5h 26mdirect
C$ 375Air Canada
Find Deal
Fri, 28 Nov - Thu, 4 Dec
United Airlines Logo
11:20 p.m. - 11:38 a.m.SEA-YYZ
9h 18m1 stop
United Airlines Logo
3:00 p.m. - 10:32 p.m.YYZ-SEA
10h 32m1 stop
C$ 418United Airlines
Find Deal
Tue, 10 Mar - Wed, 11 Mar
United Airlines Logo
8:20 a.m. - 6:57 p.m.PDX-YYZ
7h 37m1 stop
United Airlines Logo
5:55 p.m. - 12:37 a.m.YYZ-PDX
9h 42m1 stop
C$ 480United Airlines
Find Deal
Tue, 25 Nov - Tue, 2 Dec
Delta Logo
6:00 a.m. - 4:02 p.m.PDX-YYZ
7h 02m1 stop
Delta Logo
6:30 a.m. - 12:54 p.m.YYZ-PDX
9h 24m1 stop
C$ 481Delta
Find Deal
Fri, 28 Nov - Sat, 6 Dec
Delta Logo
11:15 p.m. - 8:57 a.m.PDX-YYZ
6h 42m1 stop
Delta Logo
12:23 p.m. - 10:19 p.m.YYZ-PDX
12h 56m1 stop
C$ 495Delta
Find Deal
Sun, 23 Nov - Tue, 2 Dec

Delta flights from State of Washington to Region of Ontario

Our best Delta deals on State of Washington to Region of Ontario flight tickets
Delta
18 Nov
PDX11:15 p.m.Portland
9h 09m
1 stop
YYZ11:24 a.m.Toronto Pearson Intl
23 Nov
YYZ6:30 a.m.Toronto Pearson Intl
9h 18m
1 stop
PDX12:48 p.m.Portland
C$ 480
Find similar
Delta
28 Nov
PDX6:00 a.m.Portland
7h 02m
1 stop
YYZ4:02 p.m.Toronto Pearson Intl
6 Dec
YYZ6:30 a.m.Toronto Pearson Intl
9h 24m
1 stop
PDX12:54 p.m.Portland
C$ 481
Find similar
Delta
23 Nov
PDX11:15 p.m.Portland
6h 42m
1 stop
YYZ8:57 a.m.Toronto Pearson Intl
2 Dec
YYZ12:23 p.m.Toronto Pearson Intl
12h 56m
1 stop
PDX10:19 p.m.Portland
C$ 495
Find similar

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
4 Dec
SEA3:10 p.m.Seattle/Tacoma Intl
11h 48m
2 stops
YYZ5:58 a.m.Toronto Pearson Intl
11 Dec
YYZ8:45 p.m.Toronto Pearson Intl
16h 37m
1 stop
SEA10:22 a.m.Seattle/Tacoma Intl
C$ 360
Find similar
WestJet
25 Nov
SEA3:10 p.m.Seattle/Tacoma Intl
18h 13m
2 stops
YYZ12:23 p.m.Toronto Pearson Intl
2 Dec
YYZ7:45 a.m.Toronto Pearson Intl
9h 35m
1 stop
SEA2:20 p.m.Seattle/Tacoma Intl
C$ 363
Find similar
WestJet
5 Dec
SEA11:55 a.m.Seattle/Tacoma Intl
16h 03m
1 stop
YYZ6:58 a.m.Toronto Pearson Intl
7 Dec
YYZ7:45 a.m.Toronto Pearson Intl
9h 35m
1 stop
SEA2:20 p.m.Seattle/Tacoma Intl
C$ 365
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 6 November 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

Tue 3/2

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

Nonstop4h 40m

Toronto Pearson Intl

Tue 3/3

4:45 p.m.-7:05 p.m.

Nonstop5h 20m

C$ 354

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Wed 3/12

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

Nonstop4h 40m

Toronto Pearson Intl

Wed 10/12

7:45 a.m.-2:20 p.m.

1 stop9h 35m

C$ 356

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Thu 4/12

3:10 p.m.-5:58 a.m.

2 stops11h 48m

Toronto Pearson Intl

Thu 11/12

8:45 p.m.-10:22 a.m.

1 stop16h 37m

C$ 360

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Tue 25/11

3:10 p.m.-12:23 p.m.

2 stops18h 13m

Toronto Pearson Intl

Tue 2/12

7:45 a.m.-2:20 p.m.

1 stop9h 35m

C$ 363

PortlandToronto

PDX - YYZ

PDXYYZ

Portland

Mon 26/1

3:15 p.m.-5:38 a.m.

2 stops11h 23m

Toronto Pearson Intl

Tue 3/2

8:00 a.m.-6:30 p.m.

2 stops13h 30m

C$ 370

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Fri 28/11

8:10 a.m.-3:53 p.m.

Nonstop4h 43m

Toronto Pearson Intl

Thu 4/12

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

Nonstop5h 26m

C$ 375

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Tue 10/3

11:20 p.m.-11:38 a.m.

1 stop9h 18m

Toronto Pearson Intl

Wed 11/3

3:00 p.m.-10:32 p.m.

1 stop10h 32m

C$ 418

PortlandToronto

PDX - YYZ

PDXYYZ

Portland

Tue 25/11

8:20 a.m.-6:57 p.m.

1 stop7h 37m

Toronto Pearson Intl

Tue 2/12

5:55 p.m.-12:37 a.m.

1 stop9h 42m

C$ 480

PortlandToronto

PDX - YYZ

PDXYYZ

Portland

Fri 28/11

6:00 a.m.-4:02 p.m.

1 stop7h 02m

Toronto Pearson Intl

Sat 6/12

6:30 a.m.-12:54 p.m.

1 stop9h 24m

C$ 481

PortlandToronto

PDX - YYZ

PDXYYZ

Portland

Sun 23/11

11:15 p.m.-8:57 a.m.

1 stop6h 42m

Toronto Pearson Intl

Tue 2/12

12:23 p.m.-10:19 p.m.

1 stop12h 56m

C$ 495

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

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, January 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$ 401. If you are unable to visit Region of Ontario during the month of January, then departing from State of Washington during the month February is also very affordable. Most momondo users find prices during this month for around C$ 403.

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$ 547. The most expensive day to fly to Region of Ontario is Tuesday, with ticket prices averaging around C$ 1,110.

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$ 503. If you have a flexible travel schedule, then try to avoid flying in the morning when prices are C$ 916 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$ 581 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$ 412 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 13% 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$ 187

Fastest flight time

4h 35m

Direct flights

Every day

Airports in Region of Ontario

1 airport
The best one-way flight to Region of Ontario from State of Washington in the past 72 hours is C$ 187. The best round-trip flight deal from State of Washington to Region of Ontario found on momondo in the last 72 hours is C$ 414.
The fastest flight from State of Washington to Region of Ontario takes 4h 35m
Direct flights go from State of Washington to Region of Ontario every day.
There is 1 airport near Region of Ontario: 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$ 291Free CancellationRating
7.2
3,154 reviews
Search WestJet flights
Air CanadaPriceFrom C$ 330Free CancellationRating
7.1
10,414 reviews
Search Air Canada flights
Alaska AirlinesPriceFrom C$ 376Free CancellationRating
8.0
11,243 reviews
Search Alaska Airlines flights
United AirlinesPriceFrom C$ 490Free CancellationRating
7.4
9,003 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.

An easier way to manage your Region of Ontario trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Sat 6/12
Sat 13/12
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to Ontario

Popular Cities in Ontario

Popular flights according to clicks in the last 7 days on momondo
Flights to Torontofrom C$ 90
Flights to Vancouverfrom C$ 72
Flights to Montrealfrom C$ 134
Flights to Calgaryfrom C$ 82
Flights to Ottawafrom C$ 205
Flights to Winnipegfrom C$ 130
Flights to Halifaxfrom C$ 114
Flights to Kelownafrom C$ 73
Flights to Saskatoonfrom C$ 152
Flights to Reginafrom C$ 171
Flights to St. John'sfrom C$ 274
Flights to Québec Cityfrom C$ 295