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Cheap flights from Toronto Region of Waterloo Intl Airport to Washington from $158

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Toronto Region of Waterloo Intl Airport to Washington departing on 12/25. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from Toronto Region of Waterloo Intl Airport to Washington

Cheap round-trip flights

Enter your travel dates to find the best prices.
WestJet Logo
6:20 am - 2:19 pmYKF-SEA
10h 59m1 stop
WestJet Logo
3:10 pm - 5:29 amSEA-YKF
11h 19m1 stop
$260WestJet
Find Deal
Mon, Mar 23 - Wed, Mar 25
WestJet Logo
7:00 pm - 1:19 pmYKF-SEA
21h 19m1 stop
WestJet Logo
3:10 pm - 5:29 amSEA-YKF
11h 19m1 stop
$263WestJet
Find Deal
Sat, Mar 7 - Sun, Mar 29
WestJet Logo
6:20 am - 2:19 pmYKF-SEA
10h 59m1 stop
WestJet Logo
3:10 pm - 5:29 amSEA-YKF
11h 19m1 stop
$275WestJet
Find Deal
Tue, Mar 17 - Mon, Mar 23
WestJet Logo
6:20 am - 2:20 pmYKF-SEA
11h 00m1 stop
WestJet Logo
3:10 pm - 5:28 amSEA-YKF
11h 18m1 stop
$316WestJet
Find Deal
Thu, Dec 4 - Wed, Dec 10
WestJet Logo
6:20 am - 2:40 pmYKF-SEA
11h 20m1 stop
WestJet Logo
3:10 pm - 5:28 amSEA-YKF
11h 18m1 stop
$372WestJet
Find Deal
Sat, Dec 6 - Sun, Dec 7
Multiple Airlines Logo
5:35 pm - 9:31 amYKF-SEA
18h 56m3 stops
Multiple Airlines Logo
3:40 pm - 4:00 pmSEA-YKF
21h 20m2 stops
$381Multiple Airlines
Find Deal
Tue, Dec 9 - Fri, Dec 12
Multiple Airlines Logo
6:55 pm - 10:22 amYKF-SEA
18h 27m3 stops
Multiple Airlines Logo
3:10 pm - 5:28 amSEA-YKF
11h 18m1 stop
$384Multiple Airlines
Find Deal
Thu, Dec 4 - Wed, Dec 10
WestJet Logo
6:20 am - 2:20 pmYKF-SEA
11h 00m1 stop
WestJet Logo
3:10 pm - 5:28 amSEA-YKF
11h 18m1 stop
$396WestJet
Find Deal
Thu, Dec 18 - Wed, Dec 31
Multiple Airlines Logo
7:05 am - 10:22 amYKF-SEA
30h 17m2 stops
Multiple Airlines Logo
3:10 pm - 5:28 amSEA-YKF
11h 18m1 stop
$400Multiple Airlines
Find Deal
Thu, Dec 4 - Wed, Dec 10
Multiple Airlines Logo
7:05 am - 2:20 pmYKF-SEA
10h 15m1 stop
Multiple Airlines Logo
11:55 am - 5:28 amSEA-YKF
14h 33m2 stops
$412Multiple Airlines
Find Deal
Fri, Dec 5 - Sun, Dec 7

WestJet flights from Toronto Region of Waterloo Intl Airport to State of Washington

Our best WestJet deals on Toronto Region of Waterloo Intl Airport to State of Washington flight tickets
WestJet
Mar 23
YKF6:20 amToronto Region of Waterloo Intl
10h 59m
1 stop
SEA2:19 pmSeattle/Tacoma Intl
Mar 25
SEA3:10 pmSeattle/Tacoma Intl
11h 19m
1 stop
YKF5:29 amToronto Region of Waterloo Intl
$260
Find similar
WestJet
Mar 7
YKF7:00 pmToronto Region of Waterloo Intl
21h 19m
1 stop
SEA1:19 pmSeattle/Tacoma Intl
Mar 29
SEA3:10 pmSeattle/Tacoma Intl
11h 19m
1 stop
YKF5:29 amToronto Region of Waterloo Intl
$263
Find similar
WestJet
Mar 17
YKF6:20 amToronto Region of Waterloo Intl
10h 59m
1 stop
SEA2:19 pmSeattle/Tacoma Intl
Mar 23
SEA3:10 pmSeattle/Tacoma Intl
11h 19m
1 stop
YKF5:29 amToronto Region of Waterloo Intl
$275
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Toronto Region of Waterloo Intl Airport 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 832,500 searches. Data last updated November 10, 2025.
Use the filters below to find and compare flights from Toronto Region of Waterloo Intl Airport to Washington that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

TorontoSeattle

YKF - SEA

YKFSEA

Toronto Region of Waterloo Intl

Mon 3/23

6:20 am-2:19 pm

1 stop10h 59m

Seattle/Tacoma Intl

Wed 3/25

3:10 pm-5:29 am

1 stop11h 19m

$260

TorontoSeattle

YKF - SEA

YKFSEA

Toronto Region of Waterloo Intl

Sat 3/7

7:00 pm-1:19 pm

1 stop21h 19m

Seattle/Tacoma Intl

Sun 3/29

3:10 pm-5:29 am

1 stop11h 19m

$263

TorontoSeattle

YKF - SEA

YKFSEA

Toronto Region of Waterloo Intl

Tue 3/17

6:20 am-2:19 pm

1 stop10h 59m

Seattle/Tacoma Intl

Mon 3/23

3:10 pm-5:29 am

1 stop11h 19m

$275

TorontoSeattle

YKF - SEA

YKFSEA

Toronto Region of Waterloo Intl

Thu 12/4

6:20 am-2:20 pm

1 stop11h 00m

Seattle/Tacoma Intl

Wed 12/10

3:10 pm-5:28 am

1 stop11h 18m

$316

TorontoSeattle

YKF - SEA

YKFSEA

Toronto Region of Waterloo Intl

Sat 12/6

6:20 am-2:40 pm

1 stop11h 20m

Seattle/Tacoma Intl

Sun 12/7

3:10 pm-5:28 am

1 stop11h 18m

$372

TorontoSeattle

YKF - SEA

YKFSEA

Toronto Region of Waterloo Intl

Tue 12/9

5:35 pm-9:31 am

3 stops18h 56m

Seattle/Tacoma Intl

Fri 12/12

3:40 pm-4:00 pm

2 stops21h 20m

$381

TorontoSeattle

YKF - SEA

YKFSEA

Toronto Region of Waterloo Intl

Thu 12/4

6:55 pm-10:22 am

3 stops18h 27m

Seattle/Tacoma Intl

Wed 12/10

3:10 pm-5:28 am

1 stop11h 18m

$384

TorontoSeattle

YKF - SEA

YKFSEA

Toronto Region of Waterloo Intl

Thu 12/18

6:20 am-2:20 pm

1 stop11h 00m

Seattle/Tacoma Intl

Wed 12/31

3:10 pm-5:28 am

1 stop11h 18m

$396

TorontoSeattle

YKF - SEA

YKFSEA

Toronto Region of Waterloo Intl

Thu 12/4

7:05 am-10:22 am

2 stops30h 17m

Seattle/Tacoma Intl

Wed 12/10

3:10 pm-5:28 am

1 stop11h 18m

$400

TorontoSeattle

YKF - SEA

YKFSEA

Toronto Region of Waterloo Intl

Fri 12/5

7:05 am-2:20 pm

1 stop10h 15m

Seattle/Tacoma Intl

Sun 12/7

11:55 am-5:28 am

2 stops14h 33m

$412

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 Toronto Region of Waterloo Intl Airport 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 day to depart on your flight to State of Washington?

The cheapest day to depart from Toronto Region of Waterloo Intl Airport to State of Washington is on a Tuesday. Travelers who choose to depart for State of Washington on a Tuesday will often find tickets for as low as $282. When flying out on a Friday, the most expensive travel day of the week, you can expect to see flight prices from Toronto Region of Waterloo Intl Airport to State of Washington for around $672.

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 morning when flights can be purchased for as low as $282. If you have a flexible travel schedule, then try to avoid flying at noon when prices are $672 on average. Flights to State of Washington from Toronto Region of Waterloo Intl Airport at noon are generally more expensive because this time of day is more convenient for travelers’ schedules.

Cheap Toronto Region of Waterloo Intl Airport to State of Washington flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Toronto Region of Waterloo Intl Airport to State of Washington

Direct flights

None
There are no direct flights from Toronto Region of Waterloo Intl Airport to State of Washington. There are no popular flight routes from Toronto Region of Waterloo Intl Airport to State of Washington.
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  • When did momondo last update prices for flights from Toronto Region of Waterloo Intl Airport to Washington?

    Prices for flights from Toronto Region of Waterloo Intl Airport to Washington are updated daily.

  • How old do you have to be to fly from Toronto Region of Waterloo Intl Airport 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 Toronto Region of Waterloo Intl Airport 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.

Why use momondo?

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

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 Washington from Toronto.

Can I find flights from Toronto to Washington with flexible booking policies on momondo?

All flight searches from Toronto to Washington on momondo can be filtered to show those which offer flexible booking policies.

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

Once all potential Toronto to Washington 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 Toronto to Washington right now. Can momondo alert me if prices change?

If you are simply researching potential flights to Washington, momondo offers a useful price alert feature which will track prices for flights to Washington from Toronto and alert you when they change.

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