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

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

What airlines fly to State of Washington?

Air Canada, Alaska Airlines and WestJet are the top three most popular airlines that fly to State of Washington from Region of Ontario according to our data. Air Canada is the first choice among our users, with 35% of people opting to fly with this airline when traveling to State of Washington. Keep in mind that there are 6 different airlines that fly to State of Washington on a routine basis, so you have a few additional options to choose from.

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

If you’re flying from a popular airport in Region of Ontario, such as Toronto or Hamilton, and flying into State of Washington, then you can expect flight times to average 8h 20m and 9h 16m, respectively.

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

Prices for flights from Ontario to Washington were last updated today.

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

As of January 2026, there are 6 operators available to choose from for flights from Ontario to Washington.

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

The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Ontario to Washington.

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

The required travel and health documents for your Washington trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Washington. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

$125 Cheap Flights from Ontario to Washington in 2026

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

25 flights are operational weekly from Region of Ontario to State of Washington as of January 2026. The most popular departure day for this route is Wed, with 24% of flights per week taking off on this day.

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

As of January 2026, there are 3 flights per day flying from Region of Ontario to State of Washington. The most common time of day flights depart is 4:00PM, with 58% of flights taking off in the afternoon.

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Round-trip

One-way

Last minute

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Cheap round-trip flights

Enter your travel dates to find the best prices.

7:45 am - 2:19 pm

YYZ

SEA

9h 34m1 stop

3:10 pm - 12:28 pm

SEA

YYZ

18h 18m1 stop

$185WestJet

Tue, Feb 3 - Tue, Feb 10

4:45 pm - 7:17 pm

YYZ

SEA

5h 32mnonstop

7:55 am - 3:35 pm

SEA

YYZ

4h 40mnonstop

$186Alaska Airlines

Tue, Feb 3 - Tue, Feb 10

7:45 am - 2:20 pm

YYZ

SEA

9h 35m1 stop

3:10 pm - 6:58 am

SEA

YYZ

12h 48m2 stops

$189WestJet

Wed, Jan 28 - Fri, Jan 30

7:45 am - 2:19 pm

YYZ

SEA

9h 34m1 stop

7:55 am - 3:35 pm

SEA

YYZ

4h 40mnonstop

$190Multiple Airlines

Tue, Feb 3 - Wed, Feb 11

9:00 am - 2:31 pm

YYZ

SEA

8h 31m1 stop

8:10 am - 3:53 pm

SEA

YYZ

4h 43mnonstop

$191Air Canada

Tue, Feb 3 - Tue, Feb 10

9:00 am - 2:31 pm

YYZ

SEA

8h 31m1 stop

9:55 am - 9:37 pm

SEA

YYZ

8h 42m1 stop

$196Air Canada

Tue, Feb 3 - Tue, Feb 10

3:00 pm - 9:49 pm

YUL

PDX

9h 49m1 stop

11:59 pm - 2:00 pm

PDX

YUL

11h 01m1 stop

$316United Airlines

Fri, Jan 23 - Fri, Jan 23

4:45 pm - 10:32 pm

YUL

PDX

8h 47m1 stop

11:59 pm - 9:17 pm

PDX

YUL

18h 18m1 stop

$318United Airlines

Fri, Jan 23 - Mon, Jan 26

2:40 pm - 8:32 pm

YUL

PDX

8h 52m1 stop

11:59 am - 11:50 pm

PDX

YUL

8h 51m1 stop

$320Delta

Mon, Feb 2 - Wed, Feb 4

6:00 am - 1:20 pm

YOW

PDX

10h 20m1 stop

2:00 pm - 12:40 am

PDX

YOW

7h 40m1 stop

$337Delta

Sat, May 9 - Sat, May 16

United Airlines flights from Region of Ontario to State of Washington

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

United Airlines

Feb 13

YYZ8:45 amToronto Pearson Intl

13h 18m

1 stop

SEA7:03 pmSeattle/Tacoma Intl

Feb 25

SEA11:59 pmSeattle/Tacoma Intl

13h 03m

1 stop

YYZ4:02 pmToronto Pearson Intl

$211

Find similar

United Airlines

Jan 20

YYZ10:45 amToronto Pearson Intl

13h 27m

2 stops

SEA9:12 pmSeattle/Tacoma Intl

Jan 24

SEA5:10 pmSeattle/Tacoma Intl

13h 48m

2 stops

YYZ9:58 amToronto Pearson Intl

$221

Find similar

United Airlines

Feb 8

YYZ2:57 pmToronto Pearson Intl

9h 52m

1 stop

PDX9:49 pmPortland

Feb 14

PDX11:59 pmPortland

6h 59m

1 stop

YYZ9:58 amToronto Pearson Intl

$279

Find similar

WestJet flights from Region of Ontario to State of Washington

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

WestJet

Feb 3

YYZ7:45 amToronto Pearson Intl

9h 34m

1 stop

SEA2:19 pmSeattle/Tacoma Intl

Feb 10

SEA3:10 pmSeattle/Tacoma Intl

18h 18m

1 stop

YYZ12:28 pmToronto Pearson Intl

$185

Find similar

WestJet

Jan 28

YYZ7:45 amToronto Pearson Intl

9h 35m

1 stop

SEA2:20 pmSeattle/Tacoma Intl

Jan 30

SEA3:10 pmSeattle/Tacoma Intl

12h 48m

2 stops

YYZ6:58 amToronto Pearson Intl

$189

Find similar

WestJet

Jan 21

YYZ12:30 pmToronto Pearson Intl

28h 50m

2 stops

SEA2:20 pmSeattle/Tacoma Intl

Jan 25

SEA3:10 pmSeattle/Tacoma Intl

11h 48m

2 stops

YYZ5:58 amToronto Pearson Intl

$190

Find similar

momondo Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Tue 2/3

7:45 am-2:19 pm

1 stop9h 34m

Seattle/Tacoma Intl

Tue 2/10

3:10 pm-12:28 pm

1 stop18h 18m

$185

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Tue 2/3

4:45 pm-7:17 pm

Nonstop5h 32m

Seattle/Tacoma Intl

Tue 2/10

7:55 am-3:35 pm

Nonstop4h 40m

$186

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Wed 1/28

7:45 am-2:20 pm

1 stop9h 35m

Seattle/Tacoma Intl

Fri 1/30

3:10 pm-6:58 am

2 stops12h 48m

$189

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Tue 2/3

7:45 am-2:19 pm

1 stop9h 34m

Seattle/Tacoma Intl

Wed 2/11

7:55 am-3:35 pm

Nonstop4h 40m

$190

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Tue 2/3

9:00 am-2:31 pm

1 stop8h 31m

Seattle/Tacoma Intl

Tue 2/10

8:10 am-3:53 pm

Nonstop4h 43m

$191

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Tue 2/3

9:00 am-2:31 pm

1 stop8h 31m

Seattle/Tacoma Intl

Tue 2/10

9:55 am-9:37 pm

1 stop8h 42m

$196

MontrealPortland

YUL - PDX

YULPDX

Montreal Pierre Elliott Trudeau Intl

Fri 1/23

3:00 pm-9:49 pm

1 stop9h 49m

Portland

Fri 1/23

11:59 pm-2:00 pm

1 stop11h 01m

$316

MontrealPortland

YUL - PDX

YULPDX

Montreal Pierre Elliott Trudeau Intl

Fri 1/23

4:45 pm-10:32 pm

1 stop8h 47m

Portland

Mon 1/26

11:59 pm-9:17 pm

1 stop18h 18m

$318

MontrealPortland

YUL - PDX

YULPDX

Montreal Pierre Elliott Trudeau Intl

Mon 2/2

2:40 pm-8:32 pm

1 stop8h 52m

Portland

Wed 2/4

11:59 am-11:50 pm

1 stop8h 51m

$320

OttawaPortland

YOW - PDX

YOWPDX

Ottawa

Sat 5/9

6:00 am-1:20 pm

1 stop10h 20m

Portland

Sat 5/16

2:00 pm-12:40 am

1 stop7h 40m

$337

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 Region of Ontario to State of Washington

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 State of Washington?

The month of February is, on average, the cheapest month to fly to State of Washington from Region of Ontario, with most prices found around $261. If you aren’t able to travel to State of Washington during the month of February, then flying in November is also cheap. Prices for this month can be found on momondo for an average of $307.

What is the cheapest day to depart on your flight to State of Washington?

The cheapest day to depart from Region of Ontario to State of Washington is on a Wednesday. Travelers who choose to depart for State of Washington on a Wednesday will often find tickets for as low as $421. When flying out on a Sunday, the most expensive travel day of the week, you can expect to see flight prices from Region of Ontario to State of Washington for around $760.

What is the cheapest time of day to depart on your flight to State of Washington?

The cheapest time of day to fly to State of Washington is in the evening when flights can be purchased for as low as $271. If you have a flexible travel schedule, then try to avoid flying in the morning when prices are $552 on average. Flights to State of Washington from Region of Ontario in the morning are generally more expensive because this time of day is more convenient for travelers’ schedules.

What is the cheapest Ontario to Washington flight route?

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

How far in advance should I book a flight to State of Washington?

You are more likely to see cheaper flights to State of Washington from Region of Ontario when booking weeks ahead of your departure date. In general, you can expect to find flights to State of Washington for around $352 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to State of Washington from Region of Ontario for as low as $295 on momondo.

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

There are 4 cabin classes available to choose from on Ontario to Washington 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 Region of Ontario to State of Washington flights?

You could potentially save up to 14% on your flight if you consider stops on a Region of Ontario to State of Washington flight.

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

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

Best Price Found	$205
Fastest flight time	5h 20m
Direct flights	Every day
Airports in State of Washington	96 airports

The best one-way flight to State of Washington from Region of Ontario in the past 72 hours is $205. The best round-trip flight deal from Region of Ontario to State of Washington found on momondo in the last 72 hours is $257.

The fastest flight from Region of Ontario to State of Washington takes 5h 20m

Direct flights go from Region of Ontario to State of Washington every day.

There are 96 airports in State of Washington. From Region of Ontario there are direct flights to Seattle/Tacoma Intl (SEA).

Search flight deals

When did momondo last update prices for flights from Ontario to Washington?
Prices for flights from Ontario to Washington were last updated today.
How many operators does momondo search for flights from Ontario to Washington?
As of January 2026, there are 6 operators available to choose from for flights from Ontario to Washington.
How old do you have to be to fly from Ontario to Washington?
The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Ontario to Washington.
What documentation or ID do you need to fly to Washington?
The required travel and health documents for your Washington trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Washington. We recommend that you seek guidance from your airline or a reliable third party such as IATA.
What is the most popular plane model from Region of Ontario to State of Washington?
Based on momondo bookings for flights between Region of Ontario and State of Washington, the leading plane model is Airbus A220-300, making up 61.34% of the total bookings. Other popular models include Boeing 737 MAX 8 with 7.86%, Embraer 195 E2 with 7.47%, and Boeing 737-900 Passenger/BBJ3 (winglets) with 3.09%.

Best airlines flying from Region of Ontario to State of Washington

Compare and see reviews for airlines that fly from Region of Ontario to State of Washington with momondo

Airline	Rating	Free Cancellation	Price
WestJet	PriceFrom $193	Free Cancellation	Rating 7.2 3,235 reviews	Search WestJet flights
Alaska Airlines	PriceFrom $204	Free Cancellation	Rating 8.0 11,658 reviews	Search Alaska Airlines flights
Air Canada	PriceFrom $237	Free Cancellation	Rating 7.1 10,600 reviews	Search Air Canada flights
United Airlines	PriceFrom $240	Free Cancellation	Rating 7.4 9,138 reviews	Search United Airlines flights
American Airlines	PriceFrom $277	Free Cancellation	Rating 7.2 11,090 reviews	Search American Airlines flights
Delta	PriceFrom $289	Free Cancellation	Rating 7.9 8,021 reviews	Search Delta flights

Why use momondo?

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

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Ontario to Washington for you.

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

Yes. All flights to Washington from Ontario on momondo can be compared and filtered by various policies on offer, including flexible booking.

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

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Ontario to Washington.

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

Price alerts on flights to Washington from Ontario are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

An easier way to manage your State of Washington 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.

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Popular cities in Washington

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Cheap flights from Ontario to Washington from $125

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Ontario to Washington departing on 1/22. 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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Big names and deals

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Filter for what you want

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Find the cheapest flights from Ontario to Washington

Cheap round-trip flights

Cheap one-way flights

Cheap last minute flights

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United Airlines flights from Region of Ontario to State of Washington

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

WestJet flights from Region of Ontario to State of Washington

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

momondo Fare Finder

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

See travel insights to Washington from

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

What is the cheapest month to fly to State of Washington?

What is the cheapest day to depart on your flight to State of Washington?

What is the cheapest time of day to depart on your flight to State of Washington?

What is the cheapest Ontario to Washington flight route?

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

How far in advance should I book a flight to State of Washington?

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

There are 4 cabin classes available to choose from on Ontario to Washington 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 Region of Ontario to State of Washington flights?

You could potentially save up to 14% on your flight if you consider stops on a Region of Ontario to State of Washington flight.

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

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

What airlines fly to State of Washington?

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

As of January 2026, there are 3 flights per day flying from Region of Ontario to State of Washington. The most common time of day flights depart is 4:00PM, with 58% of flights taking off in the afternoon.

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

25 flights are operational weekly from Region of Ontario to State of Washington as of January 2026. The most popular departure day for this route is Wed, with 24% of flights per week taking off on this day.

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

If you’re flying from a popular airport in Region of Ontario, such as Toronto or Hamilton, and flying into State of Washington, then you can expect flight times to average 8h 20m and 9h 16m, respectively.

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

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

Best Price Found

Fastest flight time

Direct flights

Airports in State of Washington

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

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

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

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

What is the most popular plane model from Region of Ontario to State of Washington?

Best airlines flying from Region of Ontario to State of Washington

Compare and see reviews for airlines that fly from Region of Ontario to State of Washington with momondo

Why use momondo?

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

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

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

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

An easier way to manage your State of Washington 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 Washington

Popular cities in Washington

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