Latest deals
Insights
FAQs
Reviews
Price Alerts

Cheap flights from Washington to Ontario from C$ 122

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 17/3. 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.
Air Canada Logo
8:00 a.m. - 3:43 p.m.
SEA
-
YYZ
4h 43mdirect
Air Canada Logo
6:15 p.m. - 10:56 p.m.
YYZ
-
SEA
7h 41m
1 stop
C$ 291Air Canada
Sat, 14 Mar - Sat, 21 Mar
Alaska Airlines Logo
7:55 a.m. - 3:35 p.m.
SEA
-
YYZ
4h 40mdirect
Alaska Airlines Logo
4:45 p.m. - 7:15 p.m.
YYZ
-
SEA
5h 30mdirect
C$ 301Alaska Airlines
Sat, 14 Mar - Sat, 21 Mar
Air Canada Logo
3:40 p.m. - 5:38 a.m.
SEA
-
YYZ
10h 58m
2 stops
Air Canada Logo
7:50 p.m. - 10:16 p.m.
YYZ
-
SEA
5h 26mdirect
C$ 316Air Canada
Sat, 14 Mar - Sat, 21 Mar
Alaska Airlines Logo
7:55 a.m. - 3:35 p.m.
SEA
-
YYZ
4h 40mdirect
Alaska Airlines Logo
4:55 p.m. - 7:25 p.m.
YYZ
-
SEA
5h 30mdirect
C$ 319Alaska Airlines
Wed, 25 Mar - Wed, 1 Apr
WestJet Logo
3:10 p.m. - 5:58 a.m.
SEA
-
YYZ
11h 48m
2 stops
WestJet Logo
7:45 a.m. - 2:19 p.m.
YYZ
-
SEA
9h 34m
1 stop
C$ 343WestJet
Mon, 2 Mar - Wed, 4 Mar
WestJet Logo
7:35 p.m. - 7:00 a.m.
SEA
-
YUL
8h 25m
1 stop
WestJet Logo
8:00 p.m. - 9:40 a.m.
YUL
-
SEA
16h 40m
1 stop
C$ 385WestJet
Mon, 27 Apr - Sun, 3 May
Delta Logo
2:15 p.m. - 11:06 p.m.
GEG
-
YYZ
5h 51m
1 stop
Delta Logo
12:25 p.m. - 9:37 p.m.
YYZ
-
GEG
12h 12m
1 stop
C$ 470Delta
Tue, 24 Mar - Sun, 29 Mar
United Airlines Logo
5:00 a.m. - 11:20 p.m.
GEG
-
YYZ
15h 20m
2 stops
United Airlines Logo
10:51 a.m. - 10:04 p.m.
YYZ
-
GEG
14h 13m
1 stop
C$ 484United Airlines
Thu, 26 Feb - Sun, 1 Mar
Delta Logo
10:40 p.m. - 3:08 p.m.
GEG
-
YYZ
13h 28m
2 stops
Delta Logo
10:05 a.m. - 9:37 p.m.
YYZ
-
GEG
14h 32m
2 stops
C$ 491Delta
Tue, 24 Mar - Sun, 29 Mar
United Airlines Logo
5:00 a.m. - 10:41 p.m.
GEG
-
YYZ
14h 41m
1 stop
United Airlines Logo
8:15 a.m. - 10:04 p.m.
YYZ
-
GEG
16h 49m
1 stop
C$ 574United Airlines
Thu, 26 Feb - Sun, 1 Mar

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
24 Mar
GEG2:15 p.m.Spokane
5h 51m
1 stop
YYZ11:06 p.m.Toronto Pearson Intl
29 Mar
YYZ12:25 p.m.Toronto Pearson Intl
12h 12m
1 stop
GEG9:37 p.m.Spokane
C$ 470
Delta
24 Mar
GEG10:40 p.m.Spokane
13h 28m
2 stops
YYZ3:08 p.m.Toronto Pearson Intl
29 Mar
YYZ10:05 a.m.Toronto Pearson Intl
14h 32m
2 stops
GEG9:37 p.m.Spokane
C$ 491
Delta
23 Mar
GEG10:40 p.m.Spokane
13h 28m
2 stops
YYZ3:08 p.m.Toronto Pearson Intl
30 Mar
YYZ5:10 p.m.Toronto Pearson Intl
9h 40m
2 stops
GEG11:50 p.m.Spokane
C$ 492

Alaska Airlines flights from State of Washington to Region of Ontario

Our best Alaska Airlines deals on State of Washington to Region of Ontario flight tickets
Alaska Airlines
14 Mar
SEA7:55 a.m.Seattle/Tacoma Intl
4h 40m
YYZ3:35 p.m.Toronto Pearson Intl
21 Mar
YYZ4:45 p.m.Toronto Pearson Intl
5h 30m
SEA7:15 p.m.Seattle/Tacoma Intl
C$ 301
Alaska Airlines
25 Mar
SEA7:55 a.m.Seattle/Tacoma Intl
4h 40m
YYZ3:35 p.m.Toronto Pearson Intl
1 Apr
YYZ4:55 p.m.Toronto Pearson Intl
5h 30m
SEA7:25 p.m.Seattle/Tacoma Intl
C$ 318
Alaska Airlines
25 Mar
SEA7:55 a.m.Seattle/Tacoma Intl
4h 40m
YYZ3:35 p.m.Toronto Pearson Intl
26 Mar
YYZ4:45 p.m.Toronto Pearson Intl
5h 30m
SEA7:15 p.m.Seattle/Tacoma Intl
C$ 331

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 8 February 2026.
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

Sat 14/3

8:00 a.m.-3:43 p.m.

Nonstop4h 43m

Toronto Pearson Intl

Sat 21/3

6:15 p.m.-10:56 p.m.

1 stop7h 41m

C$ 291

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Sat 14/3

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

Nonstop4h 40m

Toronto Pearson Intl

Sat 21/3

4:45 p.m.-7:15 p.m.

Nonstop5h 30m

C$ 301

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Sat 14/3

3:40 p.m.-5:38 a.m.

2 stops10h 58m

Toronto Pearson Intl

Sat 21/3

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

Nonstop5h 26m

C$ 316

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Wed 25/3

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

Nonstop4h 40m

Toronto Pearson Intl

Wed 1/4

4:55 p.m.-7:25 p.m.

Nonstop5h 30m

C$ 318

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Mon 2/3

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

2 stops11h 48m

Toronto Pearson Intl

Wed 4/3

7:45 a.m.-2:19 p.m.

1 stop9h 34m

C$ 343

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Mon 27/4

7:35 p.m.-7:00 a.m.

1 stop8h 25m

Montreal Pierre Elliott Trudeau Intl

Sun 3/5

8:00 p.m.-9:40 a.m.

1 stop16h 40m

C$ 385

SpokaneToronto

GEG - YYZ

GEGYYZ

Spokane

Tue 24/3

2:15 p.m.-11:06 p.m.

1 stop5h 51m

Toronto Pearson Intl

Sun 29/3

12:25 p.m.-9:37 p.m.

1 stop12h 12m

C$ 470

SpokaneToronto

GEG - YYZ

GEGYYZ

Spokane

Thu 26/2

5:00 a.m.-11:20 p.m.

2 stops15h 20m

Toronto Pearson Intl

Sun 1/3

10:51 a.m.-10:04 p.m.

1 stop14h 13m

C$ 484

SpokaneToronto

GEG - YYZ

GEGYYZ

Spokane

Tue 24/3

10:40 p.m.-3:08 p.m.

2 stops13h 28m

Toronto Pearson Intl

Sun 29/3

10:05 a.m.-9:37 p.m.

2 stops14h 32m

C$ 491

SpokaneToronto

GEG - YYZ

GEGYYZ

Spokane

Thu 26/2

5:00 a.m.-10:41 p.m.

1 stop14h 41m

Toronto Pearson Intl

Sun 1/3

8:15 a.m.-10:04 p.m.

1 stop16h 49m

C$ 574

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$ 368. If you are unable to visit Region of Ontario during the month of January, then departing from State of Washington during the month November is also very affordable. Most momondo users find prices during this month for around C$ 375.

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$ 530. The most expensive day to fly to Region of Ontario is Monday, with ticket prices averaging around C$ 933.

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$ 531 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$ 279 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?

No. A direct flight is the cheapest option for a flight between State of Washington to Region of Ontario.

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$ 130

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$ 130. The best round-trip flight deal from State of Washington to Region of Ontario found on momondo in the last 72 hours is C$ 330.
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 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$ 282Free CancellationRating
7.2
3,255 reviews
Search WestJet flights
Alaska AirlinesPriceFrom C$ 302Free CancellationRating
8.0
11,850 reviews
Search Alaska Airlines flights
Air CanadaPriceFrom C$ 361Free CancellationRating
7.1
10,697 reviews
Search Air Canada 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
Tue 10/3
Tue 17/3
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$ 118
Flights to Vancouverfrom C$ 77
Flights to Montrealfrom C$ 145
Flights to Calgaryfrom C$ 90
Flights to Ottawafrom C$ 206
Flights to Winnipegfrom C$ 127
Flights to Halifaxfrom C$ 79
Flights to Kelownafrom C$ 98
Flights to Saskatoonfrom C$ 127
Flights to Reginafrom C$ 138
Flights to St. John'sfrom C$ 228
Flights to Québec Cityfrom C$ 349