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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 1/25. 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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Cheap round-trip flights

Enter your travel dates to find the best prices.
Alaska Airlines Logo
7:55 am - 3:35 pmSEA-YYZ
4h 40mnonstop
Alaska Airlines Logo
4:45 pm - 7:05 pmYYZ-SEA
5h 20mnonstop
$251Alaska Airlines
Find Deal
Tue, Feb 3 - Tue, Mar 3
Multiple Airlines Logo
7:55 am - 3:35 pmSEA-YYZ
4h 40mnonstop
Multiple Airlines Logo
7:45 am - 2:20 pmYYZ-SEA
9h 35m1 stop
$252Multiple Airlines
Find Deal
Wed, Dec 3 - Wed, Dec 10
WestJet Logo
3:10 pm - 5:58 amSEA-YYZ
11h 48m2 stops
WestJet Logo
8:45 pm - 10:22 amYYZ-SEA
16h 37m1 stop
$255WestJet
Find Deal
Thu, Dec 4 - Thu, Dec 11
WestJet Logo
3:10 pm - 12:23 pmSEA-YYZ
18h 13m2 stops
WestJet Logo
7:45 am - 2:20 pmYYZ-SEA
9h 35m1 stop
$257WestJet
Find Deal
Tue, Nov 25 - Tue, Dec 2
Air Canada Logo
8:10 am - 3:53 pmSEA-YYZ
4h 43mnonstop
Air Canada Logo
7:50 pm - 10:16 pmYYZ-SEA
5h 26mnonstop
$266Air Canada
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Fri, Nov 28 - Thu, Dec 4
Air Canada Logo
8:10 am - 3:53 pmSEA-YYZ
4h 43mnonstop
Air Canada Logo
7:50 pm - 10:16 pmYYZ-SEA
5h 26mnonstop
$269Air Canada
Find Deal
Fri, Nov 28 - Thu, Dec 4
United Airlines Logo
7:43 pm - 7:30 amPDX-YYZ
8h 47m1 stop
United Airlines Logo
12:45 pm - 9:45 pmYYZ-PDX
12h 00m1 stop
$340United Airlines
Find Deal
Fri, Dec 5 - Mon, Dec 8
Delta Logo
6:00 am - 4:02 pmPDX-YYZ
7h 02m1 stop
Delta Logo
6:30 am - 12:54 pmYYZ-PDX
9h 24m1 stop
$341Delta
Find Deal
Fri, Nov 28 - Sat, Dec 6
United Airlines Logo
11:59 pm - 9:58 amPDX-YYZ
6h 59m1 stop
United Airlines Logo
6:10 am - 6:41 pmYYZ-PDX
15h 31m2 stops
$346United Airlines
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Fri, Dec 5 - Tue, Dec 9
Delta Logo
9:45 pm - 12:16 pmPDX-YYZ
11h 31m1 stop
Delta Logo
1:30 pm - 10:25 pmYYZ-PDX
11h 55m1 stop
$362Delta
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Fri, Apr 24 - Mon, Apr 27

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
Nov 28
PDX6:00 amPortland
7h 02m
1 stop
YYZ4:02 pmToronto Pearson Intl
Dec 6
YYZ6:30 amToronto Pearson Intl
9h 24m
1 stop
PDX12:54 pmPortland
$341
Find similar
Delta
Apr 24
PDX9:45 pmPortland
11h 31m
1 stop
YYZ12:16 pmToronto Pearson Intl
Apr 27
YYZ1:30 pmToronto Pearson Intl
11h 55m
1 stop
PDX10:25 pmPortland
$362
Find similar
Delta
Nov 28
PDX6:00 amPortland
7h 02m
1 stop
YYZ4:02 pmToronto Pearson Intl
Dec 5
YYZ6:10 amToronto Pearson Intl
12h 23m
2 stops
PDX3:33 pmPortland
$364
Find similar

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
Dec 4
SEA3:10 pmSeattle/Tacoma Intl
11h 48m
2 stops
YYZ5:58 amToronto Pearson Intl
Dec 11
YYZ8:45 pmToronto Pearson Intl
16h 37m
1 stop
SEA10:22 amSeattle/Tacoma Intl
$255
Find similar
WestJet
Nov 25
SEA3:10 pmSeattle/Tacoma Intl
18h 13m
2 stops
YYZ12:23 pmToronto Pearson Intl
Dec 2
YYZ7:45 amToronto Pearson Intl
9h 35m
1 stop
SEA2:20 pmSeattle/Tacoma Intl
$257
Find similar
WestJet
Dec 3
SEA3:15 pmSeattle/Tacoma Intl
18h 08m
2 stops
YYZ12:23 pmToronto Pearson Intl
Dec 10
YYZ7:45 amToronto Pearson Intl
9h 35m
1 stop
SEA2:20 pmSeattle/Tacoma Intl
$261
Find similar

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 November 6, 2025.
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 2/3

7:55 am-3:35 pm

Nonstop4h 40m

Toronto Pearson Intl

Tue 3/3

4:45 pm-7:05 pm

Nonstop5h 20m

$251

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Wed 12/3

7:55 am-3:35 pm

Nonstop4h 40m

Toronto Pearson Intl

Wed 12/10

7:45 am-2:20 pm

1 stop9h 35m

$252

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Thu 12/4

3:10 pm-5:58 am

2 stops11h 48m

Toronto Pearson Intl

Thu 12/11

8:45 pm-10:22 am

1 stop16h 37m

$255

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Tue 11/25

3:10 pm-12:23 pm

2 stops18h 13m

Toronto Pearson Intl

Tue 12/2

7:45 am-2:20 pm

1 stop9h 35m

$257

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Fri 11/28

8:10 am-3:53 pm

Nonstop4h 43m

Toronto Pearson Intl

Thu 12/4

7:50 pm-10:16 pm

Nonstop5h 26m

$266

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Fri 11/28

8:10 am-3:53 pm

Nonstop4h 43m

Toronto Pearson Intl

Thu 12/4

7:50 pm-10:16 pm

Nonstop5h 26m

$269

PortlandToronto

PDX - YYZ

PDXYYZ

Portland

Fri 12/5

7:43 pm-7:30 am

1 stop8h 47m

Toronto Pearson Intl

Mon 12/8

12:45 pm-9:45 pm

1 stop12h 00m

$340

PortlandToronto

PDX - YYZ

PDXYYZ

Portland

Fri 11/28

6:00 am-4:02 pm

1 stop7h 02m

Toronto Pearson Intl

Sat 12/6

6:30 am-12:54 pm

1 stop9h 24m

$341

PortlandToronto

PDX - YYZ

PDXYYZ

Portland

Fri 12/5

11:59 pm-9:58 am

1 stop6h 59m

Toronto Pearson Intl

Tue 12/9

6:10 am-6:41 pm

2 stops15h 31m

$346

PortlandToronto

PDX - YYZ

PDXYYZ

Portland

Fri 4/24

9:45 pm-12:16 pm

1 stop11h 31m

Toronto Pearson Intl

Mon 4/27

1:30 pm-10:25 pm

1 stop11h 55m

$362

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 $284. If you aren’t able to travel during the month of January, then book flights to Region of Ontario from State of Washington during February instead. Flights to Region of Ontario in February, while not as cheap as those in January, still average around $286.

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 $549. 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 $715. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

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

According to our data, the cheapest time of day to fly to Region of Ontario is in the afternoon. momondo users have found flights departing from State of Washington to Region of Ontario in the afternoon for as low as $283. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Flights in the evening are often more expensive with an average ticket price of $1,258.

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 $412 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 $292 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

$262

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 $262. The best round-trip flight deal from State of Washington to Region of Ontario found on momondo in the last 72 hours is $331.
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 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 $165Free CancellationRating
7.1
10,416 reviews
Search Air Canada flights
DeltaPriceFrom $170Free CancellationRating
7.9
8,001 reviews
Search Delta flights
WestJetPriceFrom $222Free CancellationRating
7.2
3,155 reviews
Search WestJet flights
Alaska AirlinesPriceFrom $253Free CancellationRating
8.0
11,246 reviews
Search Alaska Airlines flights
United AirlinesPriceFrom $282Free CancellationRating
7.4
9,007 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?

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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