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

WestJet, United Airlines, and Air Canada 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 7h 55m and 9h 24m, 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 November 2025, 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.

$140 Cheap Flights from Ontario to Washington in 2025/26

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

As of November 2025, there are 3 flights per day flying from Region of Ontario to State of Washington. The most common time of day flights depart is 7:00PM, with 50% of flights taking off in the afternoon.

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

21 flights are operational weekly from Region of Ontario to State of Washington as of November 2025. The most popular departure day for this route is Thu, with 33% of flights per week taking off on this day.

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Cheap round-trip flights

Enter your travel dates to find the best prices.

3:45 pm - 8:28 pmYOW-SEA

7h 43m1 stop

7:05 am - 6:25 pmSEA-YOW

8h 20m1 stop

$196WestJet

Find Deal

Fri, May 15 - Sat, May 23

3:45 pm - 8:28 pmYOW-SEA

7h 43m1 stop

7:05 am - 6:25 pmSEA-YOW

8h 20m1 stop

$197WestJet

Find Deal

Fri, May 15 - Sat, May 23

7:50 pm - 10:16 pmYYZ-SEA

5h 26mnonstop

3:40 pm - 5:59 amSEA-YYZ

11h 19m1 stop

$247Air Canada

Find Deal

Thu, Dec 11 - Sun, Dec 14

10:00 am - 6:26 pmYYZ-SEA

11h 26m2 stops

5:00 am - 7:17 pmSEA-YYZ

11h 17m2 stops

$248United Airlines

Find Deal

Thu, Jan 8 - Wed, Jan 14

9:00 am - 7:03 pmYYZ-SEA

13h 03m1 stop

11:45 pm - 11:48 amSEA-YYZ

9h 03m1 stop

$249United Airlines

Find Deal

Fri, Feb 13 - Sun, Feb 22

4:45 pm - 7:17 pmYYZ-SEA

5h 32mnonstop

7:55 am - 3:35 pmSEA-YYZ

4h 40mnonstop

$250Alaska Airlines

Find Deal

Thu, Jan 22 - Mon, Jan 26

8:00 am - 2:40 pmYYZ-PDX

9h 40m2 stops

7:00 pm - 11:22 amPDX-YYZ

13h 22m2 stops

$253Air Canada

Find Deal

Thu, Mar 19 - Sat, Mar 28

4:45 pm - 11:46 pmYYZ-PDX

10h 01m1 stop

6:00 am - 3:35 pmPDX-YYZ

6h 35m1 stop

$281Alaska Airlines

Find Deal

Mon, Feb 23 - Sat, Mar 7

12:23 pm - 10:19 pmYYZ-PDX

12h 56m1 stop

11:10 pm - 9:05 amPDX-YYZ

6h 55m1 stop

$288Delta

Find Deal

Thu, Dec 11 - Tue, Mar 24

6:00 am - 5:43 pmYUL-PDX

14h 43m2 stops

6:15 am - 11:32 pmPDX-YUL

14h 17m2 stops

$329Delta

Find Deal

Thu, Dec 11 - Wed, Dec 17

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

May 15

YOW3:45 pmOttawa

7h 43m

1 stop

SEA8:28 pmSeattle/Tacoma Intl

May 23

SEA7:05 amSeattle/Tacoma Intl

8h 20m

1 stop

YOW6:25 pmOttawa

$196

Find similar

WestJet

May 15

YOW3:45 pmOttawa

7h 43m

1 stop

SEA8:28 pmSeattle/Tacoma Intl

May 23

SEA7:05 amSeattle/Tacoma Intl

8h 20m

1 stop

YOW6:25 pmOttawa

$197

Find similar

WestJet

May 2

YUL6:45 amMontreal Pierre Elliott Trudeau Intl

9h 23m

1 stop

SEA1:08 pmSeattle/Tacoma Intl

May 9

SEA2:05 pmSeattle/Tacoma Intl

7h 37m

1 stop

YUL12:42 amMontreal Pierre Elliott Trudeau Intl

$202

Find similar

Air Canada flights from Region of Ontario to State of Washington

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

Air Canada

Dec 11

YYZ7:50 pmToronto Pearson Intl

5h 26m

SEA10:16 pmSeattle/Tacoma Intl

Dec 14

SEA3:40 pmSeattle/Tacoma Intl

11h 19m

1 stop

YYZ5:59 amToronto Pearson Intl

$247

Find similar

Air Canada

Mar 19

YYZ8:00 amToronto Pearson Intl

9h 40m

2 stops

PDX2:40 pmPortland

Mar 28

PDX7:00 pmPortland

13h 22m

2 stops

YYZ11:22 amToronto Pearson Intl

$253

Find similar

Air Canada

Jan 8

YYZ7:50 pmToronto Pearson Intl

5h 26m

SEA10:16 pmSeattle/Tacoma Intl

Jan 14

SEA8:10 amSeattle/Tacoma Intl

4h 43m

YYZ3:53 pmToronto Pearson Intl

$256

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

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Fri 5/15

3:45 pm-8:28 pm

1 stop7h 43m

Seattle/Tacoma Intl

Sat 5/23

7:05 am-6:25 pm

1 stop8h 20m

$196

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Fri 5/15

3:45 pm-8:28 pm

1 stop7h 43m

Seattle/Tacoma Intl

Sat 5/23

7:05 am-6:25 pm

1 stop8h 20m

$197

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Thu 12/11

7:50 pm-10:16 pm

Nonstop5h 26m

Seattle/Tacoma Intl

Sun 12/14

3:40 pm-5:59 am

1 stop11h 19m

$247

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Thu 1/8

10:00 am-6:26 pm

2 stops11h 26m

Seattle/Tacoma Intl

Wed 1/14

5:00 am-7:17 pm

2 stops11h 17m

$248

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Fri 2/13

9:00 am-7:03 pm

1 stop13h 03m

Seattle/Tacoma Intl

Sun 2/22

11:45 pm-11:48 am

1 stop9h 03m

$249

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Thu 1/22

4:45 pm-7:17 pm

Nonstop5h 32m

Seattle/Tacoma Intl

Mon 1/26

7:55 am-3:35 pm

Nonstop4h 40m

$250

TorontoPortland

YYZ - PDX

YYZPDX

Toronto Pearson Intl

Thu 3/19

8:00 am-2:40 pm

2 stops9h 40m

Portland

Sat 3/28

7:00 pm-11:22 am

2 stops13h 22m

$253

TorontoPortland

YYZ - PDX

YYZPDX

Toronto Pearson Intl

Mon 2/23

4:45 pm-11:46 pm

1 stop10h 01m

Portland

Sat 3/7

6:00 am-3:35 pm

1 stop6h 35m

$281

TorontoPortland

YYZ - PDX

YYZPDX

Toronto Pearson Intl

Thu 12/11

12:23 pm-10:19 pm

1 stop12h 56m

Portland

Tue 3/24

11:10 pm-9:05 am

1 stop6h 55m

$288

MontrealPortland

YUL - PDX

YULPDX

Montreal Pierre Elliott Trudeau Intl

Thu 12/11

6:00 am-5:43 pm

2 stops14h 43m

Portland

Wed 12/17

6:15 am-11:32 pm

2 stops14h 17m

$329

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 $263. If you aren’t able to travel to State of Washington during the month of February, then flying in January is also cheap. Prices for this month can be found on momondo for an average of $266.

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 Friday. Travelers who choose to depart for State of Washington on a Friday will often find tickets for as low as $440. 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 $649.

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 $266. If you have a flexible travel schedule, then try to avoid flying in the morning when prices are $539 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 $358 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 $298 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 35% 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	$184
Fastest flight time	5h 20m
Direct flights	Every day
Airports in State of Washington	1 airport

The best one-way flight to State of Washington from Region of Ontario in the past 72 hours is $184. The best round-trip flight deal from Region of Ontario to State of Washington found on momondo in the last 72 hours is $325.

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 is 1 airport near State of Washington: 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 November 2025, 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 44.21% of the total bookings. Other popular models include Airbus A320-100/200 with 16.32%, Boeing 737 MAX 8 with 12.04%, and Embraer 195 E2 with 4.51%.

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 $192	Free Cancellation	Rating 7.2 3,168 reviews	Search WestJet flights
Alaska Airlines	PriceFrom $225	Free Cancellation	Rating 8.0 11,324 reviews	Search Alaska Airlines flights
Air Canada	PriceFrom $238	Free Cancellation	Rating 7.1 10,463 reviews	Search Air Canada flights
United Airlines	PriceFrom $243	Free Cancellation	Rating 7.4 9,029 reviews	Search United Airlines flights
American Airlines	PriceFrom $277	Free Cancellation	Rating 7.2 11,047 reviews	Search American Airlines flights
Delta	PriceFrom $289	Free Cancellation	Rating 7.9 8,002 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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Cheap flights from Ontario to Washington from $140

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 12/4. 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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Find the cheapest flights from Ontario to Washington

Cheap round-trip flights

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WestJet flights from Region of Ontario to State of Washington

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

Air Canada flights from Region of Ontario to State of Washington

Our best Air Canada 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.

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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

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 35% 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, United Airlines, and Air Canada 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 November 2025, there are 3 flights per day flying from Region of Ontario to State of Washington. The most common time of day flights depart is 7:00PM, with 50% of flights taking off in the afternoon.

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

21 flights are operational weekly from Region of Ontario to State of Washington as of November 2025. The most popular departure day for this route is Thu, with 33% 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 7h 55m and 9h 24m, 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