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

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

What 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 50% of people opting to fly with this airline when traveling to Region of Ontario. Keep in mind that there are 5 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?

Average flight duration from State of Washington to Region of Ontario depends on which airport you fly into and out of. Flying from Seattle to Toronto Pearson Intl Airport is 4h 43m on average, while flying from Pasco to Toronto Pearson Intl Airport is 6h 59m on average. Toronto Pearson Intl Airport is the most popular airport in Region of Ontario.

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

28 flights are operational weekly from State of Washington to Region of Ontario as of May 2026. The most popular departure day for this route is Mon, with 18% of flights per week taking off on this day.

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

As of May 2026, there are 4 flights per day flying from State of Washington to Region of Ontario. The most common time of day flights depart is 8:00AM, with 100% of flights taking off at noon.

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

Prices for flights from Washington to Ontario refresh daily.

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

As of May 2026, there are 6 operators available to choose from 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 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 Washington to Ontario.

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

The required travel and health documents for your Ontario 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 Ontario. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

$105 Cheap Flights from Washington to Ontario in 2026

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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.

10:30 am - 10:45 pm

SEA

YYZ

9h 15m

1 stop

12:00 pm - 6:45 pm

YYZ

SEA

9h 45m

2 stops

$273WestJet

Wed, Jun 24 - Mon, Jun 29

10:30 am - 11:59 pm

SEA

YYZ

10h 29m

2 stops

3:50 pm - 9:00 pm

YYZ

SEA

8h 10m

1 stop

$275WestJet

Tue, Jun 9 - Tue, Jun 16

10:30 am - 9:15 pm

SEA

YYZ

7h 45m

1 stop

6:10 am - 6:45 pm

YYZ

SEA

15h 35m

2 stops

$276WestJet

Sat, Aug 1 - Sun, Aug 9

7:35 pm - 5:45 am

SEA

YYZ

7h 10m

1 stop

3:50 pm - 9:00 pm

YYZ

SEA

8h 10m

1 stop

$277WestJet

Thu, Jun 4 - Tue, Jun 16

7:35 pm - 5:45 am

SEA

YYZ

7h 10m

1 stop

3:50 pm - 9:00 pm

YYZ

SEA

8h 10m

1 stop

$279WestJet

Fri, Jun 5 - Tue, Jun 16

5:45 am - 6:22 pm

SEA

YTZ

9h 37m

2 stops

8:55 pm - 10:05 am

YTZ

SEA

16h 10m

2 stops

$339Air Canada

Sat, Jun 6 - Fri, Jun 12

7:20 pm - 10:57 am

SEA

YTZ

12h 37m

2 stops

12:15 pm - 7:05 pm

YTZ

SEA

9h 50m

1 stop

$361Air Canada

Sat, Jun 6 - Fri, Jun 12

10:40 pm - 10:06 am

PDX

YTZ

8h 26m

1 stop

12:15 pm - 6:53 pm

YTZ

PDX

9h 38m

1 stop

$471United Airlines

Fri, Jul 24 - Sat, Aug 15

10:40 pm - 10:06 am

PDX

YTZ

8h 26m

1 stop

12:15 pm - 6:47 pm

YTZ

PDX

9h 32m

1 stop

$475United Airlines

Fri, Jun 12 - Sat, Jun 20

7:35 pm - 4:33 pm

SEA

YTZ

17h 58m

2 stops

11:55 am - 9:00 pm

YTZ

SEA

12h 05m

2 stops

$500Multiple Airlines

Fri, Jun 5 - Mon, Jun 15

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

Jun 24

SEA10:30 amSeattle/Tacoma Intl

9h 15m

1 stop

YYZ10:45 pmToronto Pearson Intl

Jun 29

YYZ12:00 pmToronto Pearson Intl

9h 45m

2 stops

SEA6:45 pmSeattle/Tacoma Intl

$273

WestJet

Jun 9

SEA10:30 amSeattle/Tacoma Intl

10h 29m

2 stops

YYZ11:59 pmToronto Pearson Intl

Jun 16

YYZ3:50 pmToronto Pearson Intl

8h 10m

1 stop

SEA9:00 pmSeattle/Tacoma Intl

$275

WestJet

Aug 1

SEA10:30 amSeattle/Tacoma Intl

7h 45m

1 stop

YYZ9:15 pmToronto Pearson Intl

Aug 9

YYZ6:10 amToronto Pearson Intl

15h 35m

2 stops

SEA6:45 pmSeattle/Tacoma Intl

$276

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

May 23

PDX6:15 amPortland

14h 09m

1 stop

YYZ11:24 pmToronto Pearson Intl

May 26

YYZ3:10 pmToronto Pearson Intl

11h 42m

1 stop

PDX11:52 pmPortland

$366

American Airlines

May 26

PDX10:59 pmPortland

10h 00m

2 stops

YYZ11:59 amToronto Pearson Intl

Jun 1

YYZ6:46 amToronto Pearson Intl

17h 53m

1 stop

PDX9:39 pmPortland

$376

American Airlines

May 23

PDX10:59 pmPortland

10h 12m

2 stops

YYZ12:11 pmToronto Pearson Intl

May 26

YYZ11:39 amToronto Pearson Intl

13h 12m

1 stop

PDX9:51 pmPortland

$430

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

Wed 6/24

10:30 am-10:45 pm

1 stop9h 15m

Toronto Pearson Intl

Mon 6/29

12:00 pm-6:45 pm

2 stops9h 45m

$273

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Tue 6/9

10:30 am-11:59 pm

2 stops10h 29m

Toronto Pearson Intl

Tue 6/16

3:50 pm-9:00 pm

1 stop8h 10m

$275

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Sat 8/1

10:30 am-9:15 pm

1 stop7h 45m

Toronto Pearson Intl

Sun 8/9

6:10 am-6:45 pm

2 stops15h 35m

$276

Quickest round-trip

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Thu 6/4

7:35 pm-5:45 am

1 stop7h 10m

Toronto Pearson Intl

Tue 6/16

3:50 pm-9:00 pm

1 stop8h 10m

$277

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Fri 6/5

7:35 pm-5:45 am

1 stop7h 10m

Toronto Pearson Intl

Tue 6/16

3:50 pm-9:00 pm

1 stop8h 10m

$279

SeattleToronto

SEA - YTZ

SEAYTZ

Seattle/Tacoma Intl

Sat 6/6

5:45 am-6:22 pm

2 stops9h 37m

Toronto Island

Fri 6/12

8:55 pm-10:05 am

2 stops16h 10m

$339

SeattleToronto

SEA - YTZ

SEAYTZ

Seattle/Tacoma Intl

Sat 6/6

7:20 pm-10:57 am

2 stops12h 37m

Toronto Island

Fri 6/12

12:15 pm-7:05 pm

1 stop9h 50m

$361

PortlandToronto

PDX - YTZ

PDXYTZ

Portland

Fri 7/24

10:40 pm-10:06 am

1 stop8h 26m

Toronto Island

Sat 8/15

12:15 pm-6:53 pm

1 stop9h 38m

$471

PortlandToronto

PDX - YTZ

PDXYTZ

Portland

Fri 6/12

10:40 pm-10:06 am

1 stop8h 26m

Toronto Island

Sat 6/20

12:15 pm-6:47 pm

1 stop9h 32m

$475

SeattleToronto

SEA - YTZ

SEAYTZ

Seattle/Tacoma Intl

Fri 6/5

7:35 pm-4:33 pm

2 stops17h 58m

Toronto Island

Mon 6/15

11:55 am-9:00 pm

2 stops12h 05m

$500

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?

The month of November is, on average, the cheapest month to fly to Region of Ontario from State of Washington, with most prices found around $88. If you aren’t able to travel during the month of November, then book flights to Region of Ontario from State of Washington during March instead. Flights to Region of Ontario in March, while not as cheap as those in November, still average around $93.

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

According to our data, Tuesday is the cheapest day to fly to Region of Ontario from State of Washington. The lowest ticket price found for a Tuesday departure recently was $500. Keep in mind that prices can always vary depending on your route and whether or not you are flying domestic or international. Flights from State of Washington to Region of Ontario on a Sunday will generally be more expensive and average around $710. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

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 from Washington to 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 $388 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 $311 on momondo.

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

You could potentially save up to 24% on your flight if you consider stops on a State of Washington to Region of Ontario flight.

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	$291
Fastest flight time	4h 43m
Direct flights	Every day
Airports in Region of Ontario	125 airports

The best one-way flight to Region of Ontario from State of Washington in the past 72 hours is $291. The best round-trip flight deal from State of Washington to Region of Ontario found on momondo in the last 72 hours is $481.

The fastest flight from State of Washington to Region of Ontario takes 4h 43m

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

There are 125 airports in Region of Ontario. From State of Washington there are direct flights to Toronto Pearson Intl (YYZ).

Search flight deals

Frequently asked questions about flying from Washington to Ontario

When did momondo last update prices for flights from Washington to Ontario?
Prices for flights from Washington to Ontario refresh daily.
How many operators does momondo search for flights from Washington to Ontario?
As of May 2026, there are 6 operators available to choose from 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 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 Washington to Ontario.
What documentation or ID do you need to fly to Ontario?
The required travel and health documents for your Ontario 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 Ontario. 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 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 A220-300 (54.37% of total bookings). The next most popular plane models are Boeing 737 MAX 8 (7.04%), Airbus A330-900neo (5.97%), and Boeing 737-900 Passenger/BBJ3 (winglets) (4.48%).

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 $132	Free Cancellation	Rating 7.1 11,019 reviews	Search Air Canada flights
Delta	PriceFrom $142	Free Cancellation	Rating 7.9 8,447 reviews	Search Delta flights
United Airlines	PriceFrom $167	Free Cancellation	Rating 7.4 9,701 reviews	Search United Airlines flights
WestJet	PriceFrom $222	Free Cancellation	Rating 7.2 3,332 reviews	Search WestJet flights
Alaska Airlines	PriceFrom $251	Free Cancellation	Rating 7.9 12,354 reviews	Search Alaska 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?

Flights from Washington to Ontario with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

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

Once all potential Washington to Ontario flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

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

If you are not ready to book a flight from Washington to Ontario now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Ontario and let you know when they change.

An easier way to manage your Region of Ontario trip

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Popular cities in Ontario

Flights to Torontofrom $111

Flights to Vancouverfrom $160

Flights to Montrealfrom $138

Flights to Calgaryfrom $219

Flights to Ottawafrom $267

Flights to Halifaxfrom $253

Flights to Winnipegfrom $294

Flights to Québec Cityfrom $413

Flights to Saskatoonfrom $269

Flights to Kelownafrom $265

Flights to St. John'sfrom $358

Flights to Reginafrom $377

Cheap flights from Washington to Ontario from $105

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 8/6. 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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WestJet flights from State of Washington to Region of Ontario

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

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

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 from Washington to Ontario?

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?

What 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

Frequently asked questions about flying from Washington to 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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