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Cheap flights from Ontario to Washington from C$ 185

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 22/10. 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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Cheap round-trip flights

Enter your travel dates to find the best prices.
WestJet Logo
7:45 a.m. - 2:20 p.m.YYZ-SEA
9h 35m1 stop
WestJet Logo
11:55 a.m. - 11:39 p.m.SEA-YYZ
8h 44m2 stops
C$ 293WestJet
Find Deal
lun., 24 nov. - sáb., 6 dic.
WestJet Logo
7:45 a.m. - 2:20 p.m.YYZ-SEA
9h 35m1 stop
WestJet Logo
11:55 a.m. - 6:58 a.m.SEA-YYZ
16h 03m1 stop
C$ 294WestJet
Find Deal
mar., 11 nov. - vie., 28 nov.
WestJet Logo
8:00 a.m. - 2:38 p.m.YYZ-SEA
9h 38m2 stops
WestJet Logo
11:55 a.m. - 6:58 a.m.SEA-YYZ
16h 03m1 stop
C$ 298WestJet
Find Deal
sáb., 22 nov. - vie., 5 dic.
Air Canada Logo
5:45 a.m. - 3:01 p.m.YOW-SEA
12h 16m2 stops
Air Canada Logo
8:00 p.m. - 6:43 a.m.SEA-YOW
7h 43m1 stop
C$ 318Air Canada
Find Deal
mar., 3 mar. - lun., 9 mar.
United Airlines Logo
2:15 p.m. - 8:56 p.m.YOW-SEA
9h 41m1 stop
United Airlines Logo
7:00 a.m. - 9:14 p.m.SEA-YOW
11h 14m1 stop
C$ 326United Airlines
Find Deal
sáb., 28 feb. - mar., 3 mar.
Air Canada Logo
5:45 a.m. - 3:01 p.m.YOW-SEA
12h 16m2 stops
Air Canada Logo
8:00 p.m. - 9:23 a.m.SEA-YOW
10h 23m2 stops
C$ 327Air Canada
Find Deal
mar., 3 mar. - mar., 3 mar.
United Airlines Logo
6:30 a.m. - 12:42 p.m.YYZ-PDX
9h 12m1 stop
United Airlines Logo
7:30 a.m. - 5:55 p.m.PDX-YYZ
7h 25m1 stop
C$ 391United Airlines
Find Deal
mar., 21 oct. - sáb., 25 oct.
Delta Logo
12:55 p.m. - 9:48 p.m.YUL-PDX
11h 53m1 stop
Delta Logo
12:06 p.m. - 11:21 p.m.PDX-YUL
8h 15m1 stop
C$ 419Delta
Find Deal
jue., 23 oct. - mar., 28 oct.
Delta Logo
12:55 p.m. - 9:48 p.m.YUL-PDX
11h 53m1 stop
Delta Logo
12:06 p.m. - 11:21 p.m.PDX-YUL
8h 15m1 stop
C$ 425Delta
Find Deal
jue., 23 oct. - vie., 31 oct.
Alaska Airlines Logo
4:45 p.m. - 10:27 p.m.YYZ-PDX
8h 42m1 stop
Alaska Airlines Logo
6:14 a.m. - 3:35 p.m.PDX-YYZ
6h 21m1 stop
C$ 511Alaska Airlines
Find Deal
mié., 17 dic. - lun., 5 ene.

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
24 Nov
YYZ7:45 a.m.Toronto Pearson Intl
9h 35m
1 stop
SEA2:20 p.m.Seattle/Tacoma Intl
6 Dec
SEA11:55 a.m.Seattle/Tacoma Intl
8h 44m
2 stops
YYZ11:39 p.m.Toronto Pearson Intl
C$ 293
Find similar
WestJet
11 Nov
YYZ7:45 a.m.Toronto Pearson Intl
9h 35m
1 stop
SEA2:20 p.m.Seattle/Tacoma Intl
28 Nov
SEA11:55 a.m.Seattle/Tacoma Intl
16h 03m
1 stop
YYZ6:58 a.m.Toronto Pearson Intl
C$ 294
Find similar
WestJet
22 Nov
YYZ8:00 a.m.Toronto Pearson Intl
9h 38m
2 stops
SEA2:38 p.m.Seattle/Tacoma Intl
5 Dec
SEA11:55 a.m.Seattle/Tacoma Intl
16h 03m
1 stop
YYZ6:58 a.m.Toronto Pearson Intl
C$ 298
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
3 Mar
YOW5:45 a.m.Ottawa
12h 16m
2 stops
SEA3:01 p.m.Seattle/Tacoma Intl
9 Mar
SEA8:00 p.m.Seattle/Tacoma Intl
7h 43m
1 stop
YOW6:43 a.m.Ottawa
C$ 318
Find similar
Air Canada
3 Mar
YOW5:45 a.m.Ottawa
12h 16m
2 stops
SEA3:01 p.m.Seattle/Tacoma Intl
3 Mar
SEA8:00 p.m.Seattle/Tacoma Intl
10h 23m
2 stops
YOW9:23 a.m.Ottawa
C$ 327
Find similar
Air Canada
25 Feb
YOW5:00 a.m.Ottawa
12h 31m
2 stops
SEA2:31 p.m.Seattle/Tacoma Intl
4 Mar
SEA10:05 a.m.Seattle/Tacoma Intl
12h 33m
2 stops
YOW1:38 a.m.Ottawa
C$ 336
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Region of Ontario to State of Washington 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 96,600 searches. Data last updated 2 octubre 2025.
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

lun. 24/11

7:45 a.m.-2:20 p.m.

1 stop9h 35m

Seattle/Tacoma Intl

sáb. 6/12

11:55 a.m.-11:39 p.m.

2 stops8h 44m

C$ 293

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

mar. 11/11

7:45 a.m.-2:20 p.m.

1 stop9h 35m

Seattle/Tacoma Intl

vie. 28/11

11:55 a.m.-6:58 a.m.

1 stop16h 03m

C$ 294

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

sáb. 22/11

8:00 a.m.-2:38 p.m.

2 stops9h 38m

Seattle/Tacoma Intl

vie. 5/12

11:55 a.m.-6:58 a.m.

1 stop16h 03m

C$ 298

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

mar. 3/3

5:45 a.m.-3:01 p.m.

2 stops12h 16m

Seattle/Tacoma Intl

lun. 9/3

8:00 p.m.-6:43 a.m.

1 stop7h 43m

C$ 318

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

sáb. 28/2

2:15 p.m.-8:56 p.m.

1 stop9h 41m

Seattle/Tacoma Intl

mar. 3/3

7:00 a.m.-9:14 p.m.

1 stop11h 14m

C$ 326

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

mar. 3/3

5:45 a.m.-3:01 p.m.

2 stops12h 16m

Seattle/Tacoma Intl

mar. 3/3

8:00 p.m.-9:23 a.m.

2 stops10h 23m

C$ 327

TorontoPortland

YYZ - PDX

YYZPDX

Toronto Pearson Intl

mar. 21/10

6:30 a.m.-12:42 p.m.

1 stop9h 12m

Portland

sáb. 25/10

7:30 a.m.-5:55 p.m.

1 stop7h 25m

C$ 391

MontrealPortland

YUL - PDX

YULPDX

Montreal Pierre Elliott Trudeau Intl

jue. 23/10

12:55 p.m.-9:48 p.m.

1 stop11h 53m

Portland

mar. 28/10

12:06 p.m.-11:21 p.m.

1 stop8h 15m

C$ 419

MontrealPortland

YUL - PDX

YULPDX

Montreal Pierre Elliott Trudeau Intl

jue. 23/10

12:55 p.m.-9:48 p.m.

1 stop11h 53m

Portland

vie. 31/10

12:06 p.m.-11:21 p.m.

1 stop8h 15m

C$ 425

TorontoPortland

YYZ - PDX

YYZPDX

Toronto Pearson Intl

mié. 17/12

4:45 p.m.-10:27 p.m.

1 stop8h 42m

Portland

lun. 5/1

6:14 a.m.-3:35 p.m.

1 stop6h 21m

C$ 511

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 Washington from

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?

In general, February is the cheapest month to fly from Region of Ontario to State of Washington. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around C$ 366. If you’re not able to fly to State of Washington in February, then January is your next best option. Flight prices from Region of Ontario to State of Washington during January average around C$ 369.

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

On average, the least expensive day to fly to State of Washington from Region of Ontario is on a Thursday. momondo users have found tickets for Thursday departures for as low as C$ 566. However, this price may fluctuate depending on the airline, the season, and holidays. Be sure to avoid booking your departure on a Monday as prices are generally higher than usual. According to our data, the average ticket price to State of Washington on Monday is C$ 770.

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

According to our data, the cheapest time of day to fly to State of Washington is in the evening. momondo users have found flights departing from Region of Ontario to State of Washington in the evening for as low as C$ 441. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. If you have a flexible travel schedule, then try to avoid flying in the morning when prices are C$ 854 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 travellers’ 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 C$ 496 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 C$ 426 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 29% 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

C$ 369

Fastest flight time

5h 15m

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 C$ 369. The best round-trip flight deal from Region of Ontario to State of Washington found on momondo in the last 72 hours is C$ 362.
The fastest flight from Region of Ontario to State of Washington takes 5h 15m
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 are updated daily.

  • 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?

    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 necessary travel and health documents for your Washington trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

  • 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
Airline
Rating
Free Cancellation
Price
WestJetPriceFrom C$ 184Free CancellationRating
7.2
3,111 reviews
Search WestJet flights
United AirlinesPriceFrom C$ 280Free CancellationRating
7.4
8,933 reviews
Search United Airlines flights
Alaska AirlinesPriceFrom C$ 301Free CancellationRating
8.0
10,000 reviews
Search Alaska Airlines flights
Air CanadaPriceFrom C$ 342Free CancellationRating
7.1
10,000 reviews
Search Air Canada flights
DeltaPriceFrom C$ 377Free CancellationRating
7.9
7,962 reviews
Search Delta flights
Hawaiian AirlinesPriceFrom C$ 414Free CancellationRating
7.8
2,762 reviews
Search Hawaiian Airlines flights

Why use momondo?

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

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Ontario to Washington. momondo saves you time and could save you money on your trip.

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 provides multiple filters to help you find the best flight to Washington from Ontario. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

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.

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