What is the cheapest airline that flies from Washington to Ontario?

Alaska Airlines, Delta, and United Airlines are the most popular carriers operating from Washington to Ontario

How long is the flight from State of Washington to Region of Ontario?

The flight from State of Washington to Region of Ontario depends on which airports you’re departing from and arriving to, and whether or not you have a layover. If you fly from Seattle (a popular airport in State of Washington) to Toronto Pearson Intl Airport (the most popular airport in Region of Ontario), then the flight time is 4h 40m on average. If you fly from Spokane (another popular airport in State of Washington) to Toronto Pearson Intl Airport, then the average flight time is 5h 58m.

Which airlines fly to Region of Ontario?

Alaska Airlines, Air Canada and WestJet are the top three most popular airlines that fly to Region of Ontario from State of Washington according to our data. Alaska Airlines is the first choice among our users, with 64% of people opting to fly with this airline when travelling to Region of Ontario. Keep in mind that there are 3 different airlines that fly to Region of Ontario on a routine basis, so you have a few additional options to choose from.

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?

There are 3 operators available for flights from Washington to Ontario as of March 2026.

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.

C$ 150 Cheap Flights from Washington to Ontario in 2026

Q: How many flights depart from State of Washington to Region of Ontario on average per day?

As of March 2026, there are 3 flights per day flying from State of Washington to Region of Ontario. The most common time of day flights depart is 7:00a.m., with 96% of flights taking off at noon.

Q: How many flights depart from State of Washington to Region of Ontario on average per week?

The number of flights available between State of Washington and Region of Ontario is 21 per week as of March 2026. The most frequent departure day is Wed, with 29% of weekly flights leaving on this day.

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Find the cheapest flights from Washington to Ontario

Round-trip

One-way

Last minute

Direct

Cheap round-trip flights

Enter your travel dates to find the best prices.

8:00 a.m. - 3:54 p.m.

SEA

YYZ

4h 54mdirect

12:30 a.m. - 10:05 a.m.

YYZ

SEA

12h 35m

2 stops

C$ 316Air Canada

Sat, 25 Apr - Fri, 1 May

8:00 a.m. - 3:54 p.m.

SEA

YYZ

4h 54mdirect

12:30 a.m. - 10:05 a.m.

YYZ

SEA

12h 35m

2 stops

C$ 325Air Canada

Sat, 25 Apr - Fri, 1 May

2:55 p.m. - 1:38 a.m.

SEA

YYZ

7h 43m

1 stop

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

YYZ

SEA

9h 35m

2 stops

C$ 331Air Canada

Tue, 5 May - Tue, 12 May

8:00 a.m. - 3:54 p.m.

SEA

YYZ

4h 54mdirect

4:55 p.m. - 7:23 p.m.

YYZ

SEA

5h 28mdirect

C$ 334Multiple Airlines

Sat, 25 Apr - Sat, 2 May

7:55 a.m. - 3:45 p.m.

SEA

YYZ

4h 50mdirect

4:55 p.m. - 7:23 p.m.

YYZ

SEA

5h 28mdirect

C$ 344Alaska Airlines

Sat, 25 Apr - Sat, 2 May

11:59 p.m. - 10:40 a.m.

PDX

YUL

7h 41m

1 stop

2:20 p.m. - 8:42 p.m.

YUL

PDX

9h 22m

1 stop

C$ 465United Airlines

Mon, 13 Apr - Tue, 14 Apr

11:05 a.m. - 9:32 p.m.

PDX

YYZ

7h 27m

1 stop

6:30 a.m. - 10:48 p.m.

YYZ

PDX

19h 18m

1 stop

C$ 473United Airlines

Tue, 7 Jul - Sat, 11 Jul

3:20 p.m. - 3:13 p.m.

SEA

YUL

20h 53m

1 stop

7:30 a.m. - 2:31 p.m.

YUL

SEA

10h 01m

1 stop

C$ 492WestJet

Sat, 18 Apr - Sat, 25 Apr

3:10 p.m. - 5:29 a.m.

SEA

YKF

11h 19m

1 stop

6:20 a.m. - 2:19 p.m.

YKF

SEA

10h 59m

1 stop

C$ 496WestJet

Fri, 17 Apr - Tue, 21 Apr

10:03 a.m. - 10:25 a.m.

PDX

YTZ

21h 22m

1 stop

7:00 a.m. - 8:50 p.m.

YTZ

PDX

16h 50m

2 stops

C$ 703Multiple Airlines

Tue, 14 Apr - Sat, 18 Apr

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

10 Apr

SEA3:10 p.m.Seattle/Tacoma Intl

11h 48m

2 stops

YYZ5:58 a.m.Toronto Pearson Intl

14 Apr

YYZ7:45 a.m.Toronto Pearson Intl

9h 34m

1 stop

SEA2:19 p.m.Seattle/Tacoma Intl

C$ 439

WestJet

17 Apr

SEA3:10 p.m.Seattle/Tacoma Intl

11h 48m

2 stops

YYZ5:58 a.m.Toronto Pearson Intl

19 Apr

YYZ7:45 a.m.Toronto Pearson Intl

9h 34m

1 stop

SEA2:19 p.m.Seattle/Tacoma Intl

C$ 440

WestJet

17 Apr

SEA3:10 p.m.Seattle/Tacoma Intl

11h 48m

2 stops

YYZ5:58 a.m.Toronto Pearson Intl

20 Apr

YYZ7:45 a.m.Toronto Pearson Intl

9h 34m

1 stop

SEA2:19 p.m.Seattle/Tacoma Intl

C$ 448

United Airlines flights from State of Washington to Region of Ontario

Our best United Airlines deals on State of Washington to Region of Ontario flight tickets

United Airlines

28 Apr

SEA10:55 p.m.Seattle/Tacoma Intl

9h 48m

1 stop

YYZ11:43 a.m.Toronto Pearson Intl

29 Apr

YYZ2:30 p.m.Toronto Pearson Intl

9h 23m

1 stop

SEA8:53 p.m.Seattle/Tacoma Intl

C$ 433

United Airlines

13 Apr

PDX11:59 p.m.Portland

7h 41m

1 stop

YUL10:40 a.m.Montreal Pierre Elliott Trudeau Intl

14 Apr

YUL2:20 p.m.Montreal Pierre Elliott Trudeau Intl

9h 22m

1 stop

PDX8:42 p.m.Portland

C$ 465

United Airlines

6 Jul

PDX10:40 p.m.Portland

8h 14m

1 stop

YYZ9:54 a.m.Toronto Pearson Intl

13 Jul

YYZ5:15 p.m.Toronto Pearson Intl

9h 47m

1 stop

PDX12:02 a.m.Portland

C$ 474

momondo Fare Finder

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

Cheapest round-trip

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Sat 25/4

8:00 a.m.-3:54 p.m.

Nonstop4h 54m

Toronto Pearson Intl

Fri 1/5

12:30 a.m.-10:05 a.m.

2 stops12h 35m

C$ 316

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Sat 25/4

8:00 a.m.-3:54 p.m.

Nonstop4h 54m

Toronto Pearson Intl

Fri 1/5

12:30 a.m.-10:05 a.m.

2 stops12h 35m

C$ 325

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Tue 5/5

2:55 p.m.-1:38 a.m.

1 stop7h 43m

Toronto Pearson Intl

Tue 12/5

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

2 stops9h 35m

C$ 331

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Sat 25/4

8:00 a.m.-3:54 p.m.

Nonstop4h 54m

Toronto Pearson Intl

Sat 2/5

4:55 p.m.-7:23 p.m.

Nonstop5h 28m

C$ 334

Quickest round-trip

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Sat 25/4

7:55 a.m.-3:45 p.m.

Nonstop4h 50m

Toronto Pearson Intl

Sat 2/5

4:55 p.m.-7:23 p.m.

Nonstop5h 28m

C$ 344

PortlandMontreal

PDX - YUL

PDXYUL

Portland

Mon 13/4

11:59 p.m.-10:40 a.m.

1 stop7h 41m

Montreal Pierre Elliott Trudeau Intl

Tue 14/4

2:20 p.m.-8:42 p.m.

1 stop9h 22m

C$ 465

PortlandToronto

PDX - YYZ

PDXYYZ

Portland

Tue 7/7

11:05 a.m.-9:32 p.m.

1 stop7h 27m

Toronto Pearson Intl

Sat 11/7

6:30 a.m.-10:48 p.m.

1 stop19h 18m

C$ 473

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Sat 18/4

3:20 p.m.-3:13 p.m.

1 stop20h 53m

Montreal Pierre Elliott Trudeau Intl

Sat 25/4

7:30 a.m.-2:31 p.m.

1 stop10h 01m

C$ 492

SeattleToronto

SEA - YKF

SEAYKF

Seattle/Tacoma Intl

Fri 17/4

3:10 p.m.-5:29 a.m.

1 stop11h 19m

Toronto Region of Waterloo Intl

Tue 21/4

6:20 a.m.-2:19 p.m.

1 stop10h 59m

C$ 496

PortlandToronto

PDX - YTZ

PDXYTZ

Portland

Tue 14/4

10:03 a.m.-10:25 a.m.

1 stop21h 22m

Toronto Island

Sat 18/4

7:00 a.m.-8:50 p.m.

2 stops16h 50m

C$ 703

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

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

Prices

Airlines

Other information

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$ 344. 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$ 377.

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$ 536. The most expensive day to fly to Region of Ontario is Monday, with ticket prices averaging around C$ 969.

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$ 523 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$ 333 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$ 218
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$ 218. The best round-trip flight deal from State of Washington to Region of Ontario found on momondo in the last 72 hours is C$ 536.

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?
There are 3 operators available for flights from Washington to Ontario as of March 2026.
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?
Based on momondo bookings for this flight route, the most popular plane model on flight routes from State of Washington to Region of Ontario is Airbus A330-900neo (18.35% of total bookings). The next most popular plane models are Airbus A320-100/200 (17.99%), Airbus A330-200 (13.67%), and Boeing 777-300ER (6.47%).

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
WestJet	PriceFrom C$ 284	Free Cancellation	Rating 7.2 3,301 reviews	Search WestJet flights
Alaska Airlines	PriceFrom C$ 304	Free Cancellation	Rating 7.9 12,108 reviews	Search Alaska Airlines flights
Air Canada	PriceFrom C$ 363	Free Cancellation	Rating 7.1 10,838 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.

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Popular Cities in Ontario

Flights to Torontofrom C$ 142

Flights to Vancouverfrom C$ 85

Flights to Montrealfrom C$ 191

Flights to Calgaryfrom C$ 129

Flights to Ottawafrom C$ 272

Flights to Winnipegfrom C$ 179

Flights to Halifaxfrom C$ 153

Flights to Kelownafrom C$ 142

Flights to Saskatoonfrom C$ 226

Flights to Reginafrom C$ 260

Flights to St. John'sfrom C$ 274

Flights to Vancouverfrom C$ 80

Cheap flights from Washington to Ontario from C$ 150

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 25/4. 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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Filter for what you want

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WestJet flights from State of Washington to Region of Ontario

Our best WestJet deals on State of Washington to Region of Ontario flight tickets

United Airlines flights from State of Washington to Region of Ontario

Our best United Airlines deals on State of Washington to Region of Ontario flight tickets

momondo Fare Finder

Use the filters below to find and compare flights from Washington to Ontario that are best for you.

See travel insights to Ontario from

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

What is the cheapest month to fly to Region of Ontario?

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

What is the cheapest Washington to Ontario flight route?

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

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

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

What is the cheapest airline that flies from Washington to Ontario?

Which airlines fly to Region of Ontario?

How many flights depart from State of Washington to Region of Ontario on average per day?

How many flights depart from State of Washington to Region of Ontario on average per week?

How long is the flight from 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

Fastest flight time

Direct flights

Airports in 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

Why use momondo?

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.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to Ontario

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