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Cheap flights from Washington to Ontario from $89

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 3/14. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Find the cheapest flights from Washington to Ontario

Cheap round-trip flights

Enter your travel dates to find the best prices.
Alaska Airlines Logo
7:55 am - 3:35 pm
SEA
-
YYZ
4h 40mnonstop
Alaska Airlines Logo
4:45 pm - 7:18 pm
YYZ
-
SEA
5h 33mnonstop
$232Alaska Airlines
Tue, Feb 24 - Sat, Feb 28
Air Canada Logo
8:00 am - 3:43 pm
SEA
-
YYZ
4h 43mnonstop
Air Canada Logo
5:55 pm - 10:57 pm
YYZ
-
SEA
8h 02m
1 stop
$233Air Canada
Tue, Feb 24 - Tue, Feb 24
Alaska Airlines Logo
7:55 am - 3:35 pm
SEA
-
YYZ
4h 40mnonstop
Alaska Airlines Logo
4:45 pm - 7:18 pm
YYZ
-
SEA
5h 33mnonstop
$242Alaska Airlines
Tue, Feb 24 - Mon, Mar 2
WestJet Logo
3:10 pm - 5:58 am
SEA
-
YYZ
11h 48m
2 stops
WestJet Logo
7:45 am - 2:19 pm
YYZ
-
SEA
9h 34m
1 stop
$244WestJet
Wed, Mar 11 - Tue, Mar 17
WestJet Logo
3:20 pm - 5:58 am
SEA
-
YYZ
11h 38m
2 stops
WestJet Logo
7:45 am - 2:19 pm
YYZ
-
SEA
9h 34m
1 stop
$245WestJet
Sat, Apr 11 - Sun, Apr 19
Air Canada Logo
8:00 am - 3:43 pm
SEA
-
YYZ
4h 43mnonstop
Air Canada Logo
7:00 am - 7:16 pm
YYZ
-
SEA
15h 16m
1 stop
$246Air Canada
Sat, Mar 14 - Sun, Mar 22
United Airlines Logo
11:35 pm - 11:48 am
SEA
-
YYZ
9h 13m
1 stop
United Airlines Logo
3:45 pm - 11:00 pm
YYZ
-
SEA
10h 15m
1 stop
$253United Airlines
Tue, Feb 24 - Wed, Feb 25
Delta Logo
6:45 am - 10:51 pm
GEG
-
YYZ
13h 06m
2 stops
Delta Logo
6:10 am - 11:35 am
YYZ
-
GEG
8h 25m
1 stop
$355Delta
Wed, Feb 18 - Fri, Feb 20
Delta Logo
10:40 pm - 3:20 pm
GEG
-
YYZ
13h 40m
2 stops
Delta Logo
4:11 pm - 12:20 am
YYZ
-
GEG
11h 09m
2 stops
$360Delta
Sun, Apr 12 - Tue, Apr 14
United Airlines Logo
10:40 pm - 10:06 am
PDX
-
YTZ
8h 26m
1 stop
United Airlines Logo
12:15 pm - 6:47 pm
YTZ
-
PDX
9h 32m
1 stop
$411United Airlines
Wed, Jun 17 - Tue, Jun 23

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
Feb 18
GEG6:45 amSpokane
13h 06m
2 stops
YYZ10:51 pmToronto Pearson Intl
Feb 20
YYZ6:10 amToronto Pearson Intl
8h 25m
1 stop
GEG11:35 amSpokane
$355
Delta
Apr 12
GEG10:40 pmSpokane
13h 40m
2 stops
YYZ3:20 pmToronto Pearson Intl
Apr 14
YYZ4:11 pmToronto Pearson Intl
11h 09m
2 stops
GEG12:20 amSpokane
$360
Delta
Apr 24
PDX11:15 pmPortland
11h 10m
1 stop
YYZ1:25 pmToronto Pearson Intl
Apr 27
YYZ2:15 pmToronto Pearson Intl
12h 40m
2 stops
PDX11:55 pmPortland
$387

Air Canada flights from State of Washington to Region of Ontario

Our best Air Canada deals on State of Washington to Region of Ontario flight tickets
Air Canada
Feb 24
SEA8:00 amSeattle/Tacoma Intl
4h 43m
YYZ3:43 pmToronto Pearson Intl
Feb 24
YYZ5:55 pmToronto Pearson Intl
8h 02m
1 stop
SEA10:57 pmSeattle/Tacoma Intl
$233
Air Canada
Mar 14
SEA3:40 pmSeattle/Tacoma Intl
10h 58m
2 stops
YYZ5:38 amToronto Pearson Intl
Mar 22
YYZ7:00 amToronto Pearson Intl
11h 01m
1 stop
SEA3:01 pmSeattle/Tacoma Intl
$246
Air Canada
Mar 15
SEA3:40 pmSeattle/Tacoma Intl
10h 58m
2 stops
YYZ5:38 amToronto Pearson Intl
Mar 22
YYZ6:15 amToronto Pearson Intl
16h 01m
1 stop
SEA7:16 pmSeattle/Tacoma Intl
$255

momondo Fare Finder

 
Customize your flight search to find flights from State of Washington to Region of Ontario that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated February 3, 2026.
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

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Tue 2/24

7:55 am-3:35 pm

Nonstop4h 40m

Toronto Pearson Intl

Sat 2/28

4:45 pm-7:18 pm

Nonstop5h 33m

$232

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Tue 2/24

8:00 am-3:43 pm

Nonstop4h 43m

Toronto Pearson Intl

Tue 2/24

5:55 pm-10:57 pm

1 stop8h 02m

$233

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Tue 2/24

7:55 am-3:35 pm

Nonstop4h 40m

Toronto Pearson Intl

Mon 3/2

4:45 pm-7:18 pm

Nonstop5h 33m

$242

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Wed 3/11

3:10 pm-5:58 am

2 stops11h 48m

Toronto Pearson Intl

Tue 3/17

7:45 am-2:19 pm

1 stop9h 34m

$244

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Sat 4/11

3:20 pm-5:58 am

2 stops11h 38m

Toronto Pearson Intl

Sun 4/19

7:45 am-2:19 pm

1 stop9h 34m

$245

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Sat 3/14

8:00 am-3:43 pm

Nonstop4h 43m

Toronto Pearson Intl

Sun 3/22

7:00 am-7:16 pm

1 stop15h 16m

$246

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Tue 2/24

11:35 pm-11:48 am

1 stop9h 13m

Toronto Pearson Intl

Wed 2/25

3:45 pm-11:00 pm

1 stop10h 15m

$253

SpokaneToronto

GEG - YYZ

GEGYYZ

Spokane

Wed 2/18

6:45 am-10:51 pm

2 stops13h 06m

Toronto Pearson Intl

Fri 2/20

6:10 am-11:35 am

1 stop8h 25m

$355

SpokaneToronto

GEG - YYZ

GEGYYZ

Spokane

Sun 4/12

10:40 pm-3:20 pm

2 stops13h 40m

Toronto Pearson Intl

Tue 4/14

4:11 pm-12:20 am

2 stops11h 09m

$360

PortlandToronto

PDX - YTZ

PDXYTZ

Portland

Wed 6/17

10:40 pm-10:06 am

1 stop8h 26m

Toronto Island

Tue 6/23

12:15 pm-6:47 pm

1 stop9h 32m

$411

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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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?

The month of January is, on average, the cheapest month to fly to Region of Ontario from State of Washington, with most prices found around $269. If you aren’t able to travel during the month of January, then book flights to Region of Ontario from State of Washington during November instead. Flights to Region of Ontario in November, while not as cheap as those in January, still average around $274.

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 $514. 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 Saturday will generally be more expensive and average around $693. 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 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 $389 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 $204 on momondo.

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

There are 4 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

$121

Fastest flight time

4h 43m

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 $121. The best round-trip flight deal from State of Washington to Region of Ontario found on momondo in the last 72 hours is $338.
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 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 refresh daily.

  • 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?

    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?

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 CanadaPriceFrom $132Free CancellationRating
7.1
10,684 reviews
Search Air Canada flights
DeltaPriceFrom $142Free CancellationRating
7.9
8,139 reviews
Search Delta flights
United AirlinesPriceFrom $160Free CancellationRating
7.4
9,236 reviews
Search United Airlines flights
WestJetPriceFrom $226Free CancellationRating
7.2
3,255 reviews
Search WestJet flights
Alaska AirlinesPriceFrom $253Free CancellationRating
8.0
11,834 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.

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