Find Deals on Flights from Toronto to Seattle

Depart
Return
1 adult
Adults
18-64
Seniors
65+
Youths
12-17
Children
2-11
Seat Infants
under 2
Lap Infants
under 2
The price shown for each flight will be the average for all passengers including any infants.
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Dates flexible? Here are the best fares found in the past 48 hours...

Book cheap flights from Toronto to Seattle

(Round-trip)
Depart: Thu Apr 6 2017 Return: Sat Apr 8 2017 Trip spans 3 days
Delta
Delta
YYZ
10:00a
SEA
6:42p
8h 42m
1 stop
SEA
3:00p
YYZ
10:44p
7h 44m
1 stop
Depart: Sat Jun 17 2017 Return: Tue Jun 20 2017 Trip spans 4 days
Major Airline
Major Airline
YYZ
10:50a
SEA
9:10p
10h 20m
2 stops
SEA
5:15a
YYZ
1:45p
8h 30m
2 stops
Depart: Tue Apr 4 2017 Return: Sun Apr 9 2017 Trip spans 6 days
American Airlines
American Airlines
YYZ
7:51a
SEA
11:39p
15h 48m
1 stop
SEA
8:15p
YYZ
3:34p
19h 19m
1 stop
Depart: Thu Mar 30 2017 Return: Sun Apr 2 2017 Trip spans 4 days
WestJet
WestJet
YYZ
6:40a
SEA
3:15p
8h 35m
1 stop
SEA
3:45a
YYZ
12:27p
8h 42m
1 stop
Depart: Sat Apr 8 2017 Return: Sun Apr 9 2017 Trip spans 2 days
United
United
YYZ
4:20a
SEA
9:30a
5h 10m
nonstop
SEA
7:20p
YYZ
2:13a
6h 53m
1 stop
Depart: Thu Aug 10 2017 Return: Thu Aug 17 2017 Trip spans 8 days
Porter Airlines
Porter Airlines
YTZ
11:15a
SEA
10:08p
10h 53m
1 stop
SEA
7:59p
YTZ
6:07a
10h 08m
1 stop
Depart: Fri Jun 23 2017 Return: Sat Jul 1 2017 Trip spans 9 days
Delta
Delta
YYZ
10:00a
SEA
6:50p
8h 50m
1 stop
SEA
4:45p
YYZ
11:58p
7h 13m
1 stop
Depart: Tue Mar 21 2017 Return: Thu Mar 23 2017 Trip spans 3 days
Major Airline
Major Airline
YYZ
3:45a
SEA
1:06p
9h 21m
1 stop
SEA
2:00a
YYZ
8:52a
6h 52m
1 stop
Depart: Tue Apr 18 2017 Return: Fri Apr 21 2017 Trip spans 4 days
American Airlines
American Airlines
YYZ
7:51a
SEA
9:53p
14h 02m
1 stop
SEA
7:59p
YYZ
12:12p
16h 13m
1 stop
Depart: Sat Apr 1 2017 Return: Mon Apr 3 2017 Trip spans 3 days
WestJet
WestJet
YYZ
4:15a
SEA
1:30p
9h 15m
1 stop
SEA
3:45a
YYZ
10:40a
6h 55m
1 stop
Depart: Sun Apr 2 2017 Return: Mon Apr 3 2017 Trip spans 2 days
United
United
YYZ
4:20a
SEA
9:30a
5h 10m
nonstop
SEA
7:15p
YYZ
6:03a
10h 48m
1 stop
Depart: Tue Aug 29 2017 Return: Fri Sep 1 2017 Trip spans 4 days
Delta
Delta
YYZ
10:00a
SEA
6:50p
8h 50m
1 stop
SEA
2:30p
YYZ
11:40p
9h 10m
1 stop
Depart: Sat May 6 2017 Return: Fri May 12 2017 Trip spans 7 days
American Airlines
American Airlines
YYZ
7:45a
SEA
10:58p
15h 13m
1 stop
SEA
8:10a
YYZ
4:11a
20h 01m
1 stop
Depart: Fri May 19 2017 Return: Sat May 20 2017 Trip spans 2 days
Major Airline
Major Airline
YYZ
10:30a
SEA
8:11p
9h 41m
1 stop
SEA
4:35p
YYZ
12:01a
7h 26m
1 stop
Depart: Sun May 28 2017 Return: Sun Jun 4 2017 Trip spans 8 days
WestJet
WestJet
YYZ
5:00a
SEA
1:05p
8h 05m
1 stop
SEA
5:30a
YYZ
12:45p
7h 15m
1 stop
Depart: Thu Aug 31 2017 Return: Sat Sep 2 2017 Trip spans 3 days
Delta
Delta
YYZ
10:00a
SEA
6:50p
8h 50m
1 stop
SEA
1:00p
YYZ
11:40p
10h 40m
1 stop
Depart: Sun May 7 2017 Return: Fri May 12 2017 Trip spans 6 days
American Airlines
American Airlines
YYZ
2:30p
SEA
8:15a
17h 45m
1 stop
SEA
8:10a
YYZ
4:11a
20h 01m
1 stop
Depart: Thu Aug 3 2017 Return: Mon Aug 14 2017 Trip spans 12 days
Major Airline
Major Airline
YYZ
10:50a
SEA
9:12p
10h 22m
2 stops
SEA
9:05a
YYZ
7:14p
10h 09m
2 stops
Depart: Wed Jul 19 2017 Return: Tue Jul 25 2017 Trip spans 7 days
WestJet
WestJet
YYZ
4:50a
SEA
1:00p
8h 10m
1 stop
SEA
5:40a
YYZ
2:59p
9h 19m
1 stop
Depart: Thu Mar 16 2017 Return: Wed Mar 22 2017 Trip spans 7 days
Delta
Delta
YYZ
10:00a
SEA
6:50p
8h 50m
1 stop
SEA
7:10p
YYZ
1:54a
6h 44m
1 stop
* Prices are per person and are for e–tickets and include all taxes & fees in USD.

We attempt to get accurate prices, however, prices are not guaranteed.

Here's why:

We’re not the seller.
At KAYAK we don’t set the prices, so it’s not possible for us to guarantee what other companies are selling.

We compile tonnes of data for you
Our service lets you quickly and easily compare results from hundreds of travel sites at once. In this sense, KAYAK is a search engine and we can't guarantee prices we find.

Why aren’t prices accurate 100% of the time?
Prices on airline seats, hotel rooms and car rentals can change frequently. Several people may also be trying to buy the same travel option simultaneously. As a result, you may find, on occasion, that certain prices are no longer available.

If you have more questions or if you have a bad price to report to us,
please send us an email and someone from our team will get back to you promptly.

Airports
Origin

Toronto
only $381
only $724
Destination

Seattle
$381