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Cheap flights from Toronto Region of Waterloo Intl Airport to Washington from $178

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 6/25. 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
1 adult, Economy, 0 bags

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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
8:40 pm - 9:40 am
YKF
-
SEA
16h 00m
1 stop
WestJet Logo
7:00 am - 7:50 pm
SEA
-
YKF
9h 50m
1 stop
$249WestJet
Thu, Jun 4 - Tue, Jun 23
WestJet Logo
8:40 pm - 6:45 pm
YKF
-
SEA
25h 05m
1 stop
WestJet Logo
7:35 pm - 7:50 pm
SEA
-
YKF
21h 15m
1 stop
$265WestJet
Fri, May 29 - Mon, Jun 1
WestJet Logo
8:40 pm - 6:45 pm
YKF
-
SEA
25h 05m
1 stop
WestJet Logo
7:00 am - 7:50 pm
SEA
-
YKF
9h 50m
1 stop
$266WestJet
Fri, Jun 12 - Thu, Jun 18
WestJet Logo
8:40 pm - 9:40 am
YKF
-
SEA
16h 00m
1 stop
WestJet Logo
7:35 pm - 7:50 pm
SEA
-
YKF
21h 15m
1 stop
$267WestJet
Mon, May 4 - Thu, May 14
WestJet Logo
8:40 pm - 9:40 am
YKF
-
SEA
16h 00m
1 stop
WestJet Logo
7:35 pm - 7:50 pm
SEA
-
YKF
21h 15m
1 stop
$268WestJet
Mon, Jun 15 - Thu, Jun 18
WestJet Logo
8:40 pm - 6:45 pm
YKF
-
SEA
25h 05m
1 stop
WestJet Logo
7:35 pm - 7:50 pm
SEA
-
YKF
21h 15m
1 stop
$273WestJet
Mon, May 18 - Tue, May 26
WestJet Logo
8:40 pm - 9:40 am
YKF
-
SEA
16h 00m
1 stop
WestJet Logo
7:00 am - 7:50 pm
SEA
-
YKF
9h 50m
1 stop
$275WestJet
Thu, Jun 4 - Tue, Jun 23
WestJet Logo
8:40 pm - 6:45 pm
YKF
-
SEA
25h 05m
1 stop
WestJet Logo
7:35 pm - 7:50 pm
SEA
-
YKF
21h 15m
1 stop
$305WestJet
Mon, May 18 - Mon, Jun 1
WestJet Logo
8:40 pm - 1:50 pm
YKF
-
PDX
20h 10m
1 stop
WestJet Logo
2:30 pm - 7:50 pm
PDX
-
YKF
26h 20m
1 stop
$305WestJet
Mon, Aug 17 - Fri, Aug 21
WestJet Logo
8:40 pm - 6:45 pm
YKF
-
SEA
25h 05m
1 stop
WestJet Logo
7:35 pm - 7:50 pm
SEA
-
YKF
21h 15m
1 stop
$306WestJet
Mon, Jun 15 - Thu, Jun 18

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
Jun 4
YKF8:40 pmToronto Region of Waterloo Intl
16h 00m
1 stop
SEA9:40 amSeattle/Tacoma Intl
Jun 23
SEA7:00 amSeattle/Tacoma Intl
9h 50m
1 stop
YKF7:50 pmToronto Region of Waterloo Intl
$249
WestJet
May 29
YKF8:40 pmToronto Region of Waterloo Intl
25h 05m
1 stop
SEA6:45 pmSeattle/Tacoma Intl
Jun 1
SEA7:35 pmSeattle/Tacoma Intl
21h 15m
1 stop
YKF7:50 pmToronto Region of Waterloo Intl
$265
WestJet
Jun 12
YKF8:40 pmToronto Region of Waterloo Intl
25h 05m
1 stop
SEA6:45 pmSeattle/Tacoma Intl
Jun 18
SEA7:00 amSeattle/Tacoma Intl
9h 50m
1 stop
YKF7:50 pmToronto Region of Waterloo Intl
$266

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 April 11, 2026.
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

Cheapest round-trip
Quickest round-trip

TorontoSeattle

YKF - SEA

YKFSEA

Toronto Region of Waterloo Intl

Thu 6/4

8:40 pm-9:40 am

1 stop16h 00m

Seattle/Tacoma Intl

Tue 6/23

7:00 am-7:50 pm

1 stop9h 50m

$249

TorontoSeattle

YKF - SEA

YKFSEA

Toronto Region of Waterloo Intl

Fri 5/29

8:40 pm-6:45 pm

1 stop25h 05m

Seattle/Tacoma Intl

Mon 6/1

7:35 pm-7:50 pm

1 stop21h 15m

$265

TorontoSeattle

YKF - SEA

YKFSEA

Toronto Region of Waterloo Intl

Fri 6/12

8:40 pm-6:45 pm

1 stop25h 05m

Seattle/Tacoma Intl

Thu 6/18

7:00 am-7:50 pm

1 stop9h 50m

$266

TorontoSeattle

YKF - SEA

YKFSEA

Toronto Region of Waterloo Intl

Mon 5/4

8:40 pm-9:40 am

1 stop16h 00m

Seattle/Tacoma Intl

Thu 5/14

7:35 pm-7:50 pm

1 stop21h 15m

$267

TorontoSeattle

YKF - SEA

YKFSEA

Toronto Region of Waterloo Intl

Mon 6/15

8:40 pm-9:40 am

1 stop16h 00m

Seattle/Tacoma Intl

Thu 6/18

7:35 pm-7:50 pm

1 stop21h 15m

$268

TorontoSeattle

YKF - SEA

YKFSEA

Toronto Region of Waterloo Intl

Mon 5/18

8:40 pm-6:45 pm

1 stop25h 05m

Seattle/Tacoma Intl

Tue 5/26

7:35 pm-7:50 pm

1 stop21h 15m

$273

TorontoSeattle

YKF - SEA

YKFSEA

Toronto Region of Waterloo Intl

Thu 6/4

8:40 pm-9:40 am

1 stop16h 00m

Seattle/Tacoma Intl

Tue 6/23

7:00 am-7:50 pm

1 stop9h 50m

$275

TorontoSeattle

YKF - SEA

YKFSEA

Toronto Region of Waterloo Intl

Mon 5/18

8:40 pm-6:45 pm

1 stop25h 05m

Seattle/Tacoma Intl

Mon 6/1

7:35 pm-7:50 pm

1 stop21h 15m

$305

TorontoPortland

YKF - PDX

YKFPDX

Toronto Region of Waterloo Intl

Mon 8/17

8:40 pm-1:50 pm

1 stop20h 10m

Portland

Fri 8/21

2:30 pm-7:50 pm

1 stop26h 20m

$305

TorontoSeattle

YKF - SEA

YKFSEA

Toronto Region of Waterloo Intl

Mon 6/15

8:40 pm-6:45 pm

1 stop25h 05m

Seattle/Tacoma Intl

Thu 6/18

7:35 pm-7:50 pm

1 stop21h 15m

$306

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 airline that flies from Toronto Region of Waterloo Intl to Washington?

WestJet is the most popular carrier operating from Toronto Region of Waterloo Intl to Washington

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

Fastest flight time

10h 45m

Direct flights

None
The fastest flight from Toronto Region of Waterloo Intl Airport to State of Washington takes 10h 45m
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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Frequently asked questions about flying from Toronto Region of Waterloo Intl Airport to Washington

  • 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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