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

WestJet, United Airlines, and Air Canada are the most popular carriers operating from Washington to Ontario

Which airlines fly to Region of Ontario?

Alaska Airlines, Air Canada and United Airlines 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 40% of people opting to fly with this airline when travelling to Region of Ontario. Keep in mind that there are 4 different airlines that fly to Region of Ontario on a routine basis, so you have a few additional options to choose from.

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 7h 43m.

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 4 operators available for flights from Washington to Ontario as of September 2025.

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$ 127 Cheap Flights from Washington to Ontario in 2025/26

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

As of September 2025, there are 8 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 58% 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 58 per week as of September 2025. The most frequent departure day is Wed, with 21% 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

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

7h 35m1 stop

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

9h 59m1 stop

C$ 316WestJet

Find Deal

mar., 14 oct. - mar., 21 oct.

11:50 p.m. - 10:26 a.m.SEA-YOW

7h 36m1 stop

2:15 p.m. - 8:56 p.m.YOW-SEA

9h 41m1 stop

C$ 327United Airlines

Find Deal

mar., 3 mars - mer., 4 mars

10:00 a.m. - 9:11 p.m.SEA-YYZ

8h 11m1 stop

7:30 p.m. - 9:45 p.m.YYZ-SEA

5h 15mdirect

C$ 345Air Canada

Find Deal

mer., 22 oct. - ven., 24 oct.

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

4h 40mdirect

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

5h 20mdirect

C$ 346Alaska Airlines

Find Deal

mar., 4 nov. - sam., 8 nov.

2:05 p.m. - 11:48 p.m.SEA-YHM

30h 43m2 stops

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

9h 59m1 stop

C$ 349Multiple Airlines

Find Deal

mar., 14 oct. - mar., 21 oct.

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

4h 40mdirect

12:30 p.m. - 2:20 p.m.YYZ-SEA

28h 50m2 stops

C$ 353Multiple Airlines

Find Deal

mar., 2 déc. - dim., 7 déc.

2:55 p.m. - 7:00 a.m.SEA-YYZ

13h 05m2 stops

10:25 a.m. - 6:36 p.m.YYZ-SEA

11h 11m2 stops

C$ 358Air Canada

Find Deal

mar., 7 oct. - mer., 8 oct.

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

4h 40mdirect

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

5h 20mdirect

C$ 361Alaska Airlines

Find Deal

lun., 3 nov. - mer., 5 nov.

11:58 p.m. - 12:35 p.m.PDX-YYZ

9h 37m1 stop

3:45 p.m. - 9:04 p.m.YYZ-PDX

8h 19m1 stop

C$ 443American Airlines

Find Deal

ven., 17 oct. - jeu., 23 oct.

6:07 a.m. - 4:33 p.m.PDX-YUL

7h 26m1 stop

7:25 a.m. - 8:37 p.m.YUL-PDX

16h 12m1 stop

C$ 447American Airlines

Find Deal

mer., 1 oct. - sam., 4 oct.

American Airlines flights from State of Washington to Region of Ontario

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

American Airlines

17 Oct

PDX11:58 p.m.Portland

9h 37m

1 stop

YYZ12:35 p.m.Toronto Pearson Intl

23 Oct

YYZ3:45 p.m.Toronto Pearson Intl

8h 19m

1 stop

PDX9:04 p.m.Portland

C$ 443

Find similar

American Airlines

1 Oct

PDX6:07 a.m.Portland

7h 26m

1 stop

YUL4:33 p.m.Montreal Pierre Elliott Trudeau Intl

4 Oct

YUL7:25 a.m.Montreal Pierre Elliott Trudeau Intl

16h 12m

1 stop

PDX8:37 p.m.Portland

C$ 447

Find similar

American Airlines

1 Oct

PDX9:56 p.m.Portland

21h 46m

1 stop

YUL10:42 p.m.Montreal Pierre Elliott Trudeau Intl

4 Oct

YUL7:25 a.m.Montreal Pierre Elliott Trudeau Intl

12h 39m

2 stops

PDX5:04 p.m.Portland

C$ 460

Find similar

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

3 Oct

PDX12:45 a.m.Portland

7h 53m

1 stop

YYZ11:38 a.m.Toronto Pearson Intl

18 Oct

YYZ6:00 a.m.Toronto Pearson Intl

9h 06m

1 stop

PDX12:06 p.m.Portland

C$ 470

Find similar

Delta

21 Oct

PDX12:40 a.m.Portland

8h 07m

1 stop

YYZ11:47 a.m.Toronto Pearson Intl

30 Oct

YYZ6:00 a.m.Toronto Pearson Intl

8h 56m

1 stop

PDX11:56 a.m.Portland

C$ 477

Find similar

Delta

29 Sep

SEA11:40 p.m.Seattle/Tacoma Intl

8h 58m

1 stop

YYZ11:38 a.m.Toronto Pearson Intl

6 Oct

YYZ5:50 p.m.Toronto Pearson Intl

9h 09m

1 stop

SEA11:59 p.m.Seattle/Tacoma Intl

C$ 481

Find similar

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

SeattleHamilton

SEA - YHM

SEAYHM

Seattle/Tacoma Intl

mar. 14/10

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

1 stop7h 35m

Hamilton

mar. 21/10

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

1 stop9h 59m

C$ 316

SeattleOttawa

SEA - YOW

SEAYOW

Seattle/Tacoma Intl

mar. 3/3

11:50 p.m.-10:26 a.m.

1 stop7h 36m

Ottawa

mer. 4/3

2:15 p.m.-8:56 p.m.

1 stop9h 41m

C$ 327

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

mer. 22/10

10:00 a.m.-9:11 p.m.

1 stop8h 11m

Toronto Pearson Intl

ven. 24/10

7:30 p.m.-9:45 p.m.

Nonstop5h 15m

C$ 345

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

mar. 4/11

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

Nonstop4h 40m

Toronto Pearson Intl

sam. 8/11

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

Nonstop5h 20m

C$ 346

SeattleHamilton

SEA - YHM

SEAYHM

Seattle/Tacoma Intl

mar. 14/10

2:05 p.m.-11:48 p.m.

2 stops30h 43m

Hamilton

mar. 21/10

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

1 stop9h 59m

C$ 349

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

mar. 2/12

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

Nonstop4h 40m

Toronto Pearson Intl

dim. 7/12

12:30 p.m.-2:20 p.m.

2 stops28h 50m

C$ 353

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

mar. 7/10

2:55 p.m.-7:00 a.m.

2 stops13h 05m

Toronto Pearson Intl

mer. 8/10

10:25 a.m.-6:36 p.m.

2 stops11h 11m

C$ 358

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

lun. 3/11

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

Nonstop4h 40m

Toronto Pearson Intl

mer. 5/11

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

Nonstop5h 20m

C$ 361

PortlandToronto

PDX - YYZ

PDXYYZ

Portland

ven. 17/10

11:58 p.m.-12:35 p.m.

1 stop9h 37m

Toronto Pearson Intl

jeu. 23/10

3:45 p.m.-9:04 p.m.

1 stop8h 19m

C$ 443

PortlandMontreal

PDX - YUL

PDXYUL

Portland

mer. 1/10

6:07 a.m.-4:33 p.m.

1 stop7h 26m

Montreal Pierre Elliott Trudeau Intl

sam. 4/10

7:25 a.m.-8:37 p.m.

1 stop16h 12m

C$ 447

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$ 389. 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$ 394.

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 Tuesday, with ticket prices averaging around C$ 1,164.

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 evening. Flights from State of Washington to Region of Ontario during this time can be as low as C$ 190. If you have a flexible travel schedule, then try to avoid flying in the morning when prices are C$ 963 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$ 583 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?

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$ 291
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$ 291. The best round-trip flight deal from State of Washington to Region of Ontario found on momondo in the last 72 hours is C$ 607.

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?
There are 4 operators available for flights from Washington to Ontario as of September 2025.
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 Boeing 737 MAX 8 (25.57% of total bookings). The next most popular plane models are Airbus A320-100/200 (20.28%), Airbus A220-300 (18.87%), and Boeing 737-900 Passenger/BBJ3 (winglets) (8.64%).

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
Air Canada	PriceFrom C$ 190	Free Cancellation	Rating 7.1 10,000 reviews	Search Air Canada flights
WestJet	PriceFrom C$ 323	Free Cancellation	Rating 7.2 3,095 reviews	Search WestJet flights
Alaska Airlines	PriceFrom C$ 391	Free Cancellation	Rating 8.0 10,000 reviews	Search Alaska Airlines flights
United Airlines	PriceFrom C$ 479	Free Cancellation	Rating 7.4 8,926 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

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Popular Cities in Ontario

Flights to Torontofrom C$ 101

Flights to Vancouverfrom C$ 55

Flights to Montrealfrom C$ 188

Flights to Calgaryfrom C$ 69

Flights to Ottawafrom C$ 160

Flights to Winnipegfrom C$ 109

Flights to Halifaxfrom C$ 120

Flights to Kelownafrom C$ 69

Flights to Saskatoonfrom C$ 121

Flights to Reginafrom C$ 102

Flights to St. John'sfrom C$ 149

Flights to Québec Cityfrom C$ 292

Cheap flights from Washington to Ontario from C$ 127

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 24/10. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

Big names, great deals

Big names, great deals

Filter for what you want

Filter for what you want

Trusted and free

Trusted and free

Price Alerts

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Find the cheapest flights from Washington to Ontario

Cheap round-trip flights

Cheap one-way flights

Cheap last-minute flights

Cheap direct flights

American Airlines flights from State of Washington to Region of Ontario

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

Delta flights from State of Washington to Region of Ontario

Our best Delta 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

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?

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

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

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?

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.

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

WestJet, United Airlines, and Air Canada are the most popular carriers operating 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?

As of September 2025, there are 8 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 58% of flights taking off at noon.

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 58 per week as of September 2025. The most frequent departure day is Wed, with 21% of weekly flights leaving on this day.

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

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

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?

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

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

Why use momondo?

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

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

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

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

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

Popular Cities in Ontario

Popular flights according to clicks in the last 7 days on momondo