Cheap Flights from Toronto, ON to Seattle, WA from $177

Return flight: Seattle – Toronto

On Cheapflightsplus.com you will find 3 direct and 997 connecting flights from Toronto to Seattle. You can compare airfare deals from 8 airlines and multiple travel sites from $177, book and save on cheap plane tickets and last minute offers. Also check out YTO-SEA flight schedule to find best flight time, convenient departure and arrival airports.

Find One-Way and Round-Trip Toronto to Seattle Flight Deals

To find the cheapest one way airline ticket select the date with the lowest price on the calendar below and click «Find Flights». To search for round-trip flight deals click on the link «Check prices for return flights» and select the date of the return flight. Cheapest flights in November: $177 (one-way), $304 (round-trip).
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Full flight schedule will help you in detecting at what time planes fly from Toronto to Seattle. You can also specify the concrete flights and airlines on the route and how long the flight actually is. Use the calendar for today, tomorrow or other specific date as some flights are available only on certain days of the week.
Departure Arrival Flight Details Flight Duration Price
08:25 — 10:45
08:25 — 10:45 AC541 Air Canada
Toronto — Seattle
5h 20m
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from$427
08:50 — 11:09
08:50 — 11:09 UA8270 United Airlines
Toronto — Seattle
5h 19m
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from$277
16:45 — 19:04
16:45 — 19:04 AS973 Alaska Airlines
Toronto — Seattle
5h 19m
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from$204
06:30 — 18:28
06:30 — 08:08 UA8714 United Airlines
Toronto — Newark
7h 8m stop
15:29 — 18:41 UA2630 United Airlines
Newark — Seattle
14h 58m
including layover
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from$177
06:30 — 12:57
06:30 — 08:49 WS653 WestJet
Toronto — Calgary
3h 16m stop
12:05 — 12:58 WS1550 WestJet
Calgary — Seattle
9h 27m
including layover
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from$203
07:30 — 18:28
07:30 — 09:04 UA3435 United Airlines
Toronto — Newark
6h 11m stop
15:29 — 18:41 UA2630 United Airlines
Newark — Seattle
13h 58m
including layover
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from$177
07:55 — 17:49
07:55 — 08:45 PD2387 Porter Airlines
Toronto — Chicago
6h 24m stop
15:17 — 17:54 HA6297 Hawaiian Airlines
Chicago — Seattle
12h 54m
including layover
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from$211
08:10 — 20:41
08:10 — 09:41 UA8271 United Airlines
Toronto — Washington D.C.
8h 7m stop
17:48 — 20:41 UA326 United Airlines
Washington D.C. — Seattle
15h 31m
including layover
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from$177
08:40 — 17:49
08:45 — 10:30 UA8651 United Airlines
Toronto — Denver
5h 30m stop
16:15 — 18:14 UA745 United Airlines
Denver — Seattle
12h 9m
including layover
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from$177
09:44 — 22:30
09:44 — 11:28 UA1268 United Airlines
Toronto — Denver
9h 4m stop
20:32 — 22:30 UA2651 United Airlines
Denver — Seattle
15h 46m
including layover
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from$186
10:30 — 20:56
10:30 — 13:12 UA8702 United Airlines
Toronto — San Francisco
5h 37m stop
18:55 — 21:11 UA2019 United Airlines
San Francisco — Seattle
13h 26m
including layover
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from$177
10:40 — 14:49
+1 day
10:40 — 13:00 PD663 Porter Airlines
Toronto — Los Angeles
23h stop
12:00 — 14:49 HA6204 Hawaiian Airlines
Los Angeles — Seattle
31h 9m
including layover
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from$207
12:10 — 00:59
+1 day
12:10 — 13:41 UA8670 United Airlines
Toronto — Washington D.C.
8h 28m stop
22:09 — 00:59 UA2713 United Airlines
Washington D.C. — Seattle
15h 49m
including layover
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from$193
12:45 — 20:41
12:45 — 14:19 UA3595 United Airlines
Toronto — Washington D.C.
3h 29m stop
17:48 — 20:41 UA326 United Airlines
Washington D.C. — Seattle
10h 56m
including layover
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from$177
14:30 — 20:41
14:30 — 16:10 UA3637 United Airlines
Toronto — Washington D.C.
1h 38m stop
17:48 — 20:41 UA326 United Airlines
Washington D.C. — Seattle
9h 11m
including layover
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from$177
14:30 — 00:59
+1 day
14:30 — 16:10 UA3637 United Airlines
Toronto — Washington D.C.
5h 59m stop
22:09 — 00:59 UA2713 United Airlines
Washington D.C. — Seattle
13h 29m
including layover
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from$186
15:35 — 12:39
+1 day
15:35 — 16:24 PD2393 Porter Airlines
Toronto — Chicago
17h 41m stop
10:05 — 12:39 HA6295 Hawaiian Airlines
Chicago — Seattle
24h 4m
including layover
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from$178
18:00 — 10:52
+1 day
18:00 — 19:48 UA3460 United Airlines
Toronto — Newark
11h 57m stop
07:45 — 10:52 UA1330 United Airlines
Newark — Seattle
19h 52m
including layover
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from$177
18:20 — 08:01
+1 day
18:20 — 20:05 UA8163 United Airlines
Toronto — Denver
10h stop
06:00 — 08:01 UA751 United Airlines
Denver — Seattle
16h 41m
including layover
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from$192
19:47 — 00:59
+1 day
19:47 — 21:27 UA3466 United Airlines
Toronto — Washington D.C.
42m stop
22:09 — 00:59 UA2713 United Airlines
Washington D.C. — Seattle
8h 12m
including layover
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from$177
20:05 — 15:53
+1 day
20:05 — 21:55 PD655 Porter Airlines
Toronto — Las Vegas
15h 15m stop
13:10 — 15:53 NK781 Spirit Airlines
Las Vegas — Seattle
22h 48m
including layover
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from$219
21:00 — 09:50
+1 day
21:00 — 22:05 UA4808 United Airlines
Toronto — Chicago
9h 5m stop
07:10 — 09:50 UA1643 United Airlines
Chicago — Seattle
15h 50m
including layover
Find flight
from$229
21:10 — 10:45
+1 day
21:10 — 22:47 UA8266 United Airlines
Toronto — Newark
8h 56m stop
07:45 — 10:52 UA1330 United Airlines
Newark — Seattle
16h 35m
including layover
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from$229
09:00 — 18:38
09:00 — 11:17 WS421 WestJet
Toronto — Edmonton
3h 28m stop
14:45 — 15:40 WS152 WestJet
Edmonton — Calgary
2h 5m stop
17:45 — 18:38 WS1552 WestJet
Calgary — Seattle
12h 38m
including layover
Find flight
from$213
11:00 — 11:24
+1 day
11:00 — 13:20 WS657 WestJet
Toronto — Calgary
1h 35m stop
14:55 — 17:17 WS1514 WestJet
Calgary — Los Angeles
15h 16m stop
08:33 — 11:24 F91177 Frontier Airlines
Los Angeles — Seattle
27h 24m
including layover
Find flight
from$226
15:00 — 11:24
+1 day
15:00 — 17:20 WS663 WestJet
Toronto — Calgary
2h 5m stop
19:25 — 21:47 WS1512 WestJet
Calgary — Los Angeles
10h 46m stop
08:33 — 11:24 F91177 Frontier Airlines
Los Angeles — Seattle
23h 24m
including layover
Find flight
from$188
16:00 — 00:56
+1 day
16:00 — 17:05 UA8453 United Airlines
Toronto — Ottawa
2h 24m stop
19:29 — 21:04 UA4455 United Airlines
Ottawa — Washington D.C.
1h 2m stop
22:06 — 00:56 UA716 United Airlines
Washington D.C. — Seattle
11h 56m
including layover
Find flight
from$194
19:20 — 09:21
+1 day
19:20 — 20:17 AC7712 Air Canada
Toronto — Ottawa
1h 38m stop
21:55 — 00:15 AC347 Air Canada
Ottawa — Vancouver
8h stop
08:15 — 09:21 AC8798 Air Canada
Vancouver — Seattle
17h 1m
including layover
Find flight
from$193
22:25 — 11:24
+2 days
22:25 — 00:39 WS731 WestJet
Toronto — Vancouver
8h 6m stop
08:45 — 11:45 WS1696 WestJet
Vancouver — Los Angeles
20h 48m stop
08:33 — 11:24 F91177 Frontier Airlines
Los Angeles — Seattle
39h 59m
including layover
Find flight
from$226
*Departure and arrival times - local. Updated on August 5, 2025

Flight Information

Below we will explain in detail what the flights cost on the destination from Toronto to Seattle depends on and how to choose the most interesting flight option for you.

Distance between Toronto and Seattle is 3326 miles. Time difference between the cities is 3h. Airplanes depart 06:10 to 23:20 from 3 Toronto airports and arrive 06:10 to 23:20 to 3 Seattle airports. Average flight time is 5h 19m.

  • The fastest flight 5h 19m
  • Average flight time 5h 19m
  • The earliest flight 06:10
  • The latest flight 23:20
  • Distance 2067 ml

The cheapest months to travel to Seattle are june (from 177 $), october (from 178 $), august (from 188 $).

The most expensive months are november (from 332 $), september (from 248 $), january (from 232 $).

What is the lowest airfare Toronto to Seattle?

The cheapest plane ticket found by our users is $177. This airfare is for economy class on one-way UA8714 flight by United Airlines for July 6, 2025 which leaves Pearson International in Toronto at 06:30 am and arrives at Seattle Seattle-Tacoma Intl at 18:28.

Economy class
$177
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Business class
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First class
?
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Popular Airlines on the Route

The flight Toronto — Seattle is served by 8 regular airlines and 4 low-cost airlines. Most of the flights on this route are operated by Air Canada - 75 departures per week at the price of from $ 193 . And the most expensive tickets are offered by WestJet airline - from $ 623.

Direct flights

There are 3 nonstop flights on the route. The fastest direct flight is AS973 by Alaska Airlines takes 5h 19m and the cheapest is UA8714 by United Airlines for $204.

  • from $427
    Find
  • AS - Alaska Airlines
    from $204
    Find
  • UA - United Airlines
    from $277
    Find
See more direct flights

Connecting Flights

There are 997 flights with layovers on the route. The fastest connecting flight is AC503 by Air Canada takes 7h 19m and the cheapest is UA8714 by United Airlines for $177.

  • from $193
    Find
  • F8 - Freedom Airlines
    from $231
    Find
  • AS - Alaska Airlines
    from $330
    Find
  • PD - Porter Airlines
    from $178
    Find
  • SY - Sun Country Airlines
    from $237
    Find
  • UA - United Airlines
    from $177
    Find
  • WS - WestJet
    from $188
    Find
  • TS - Air Transat
    from $223
    Find
See more connecting flights

Airports

You can fly from Toronto to Seattle from 3 airports (Buttonville Municipal, Toronto Island, Pearson International).

Toronto airports

  • Buttonville Municipal-YKZ
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  • Toronto Island-YTZ
    from $178
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  • Pearson International-YYZ
    from $177
    Find

Seattle airports

  • Boeing Field International Airport-BFI
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  • Seattle-Tacoma Intl-SEA
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  • Kenmore Air Harbor SPB-LKE
    Find

How to book a plane ticket yourself?

How to book an air ticket yourself?
  • Fill in the search parameters — cities of departure and destination, departure and return dates and click «Find flights»
  • Select the best flight that you like. Please, check the airports of departure and arrival. Select the best fare, but pay attention to the following flight details - airports of departure and arrival, flight duration and layovers. Please use filters and sort to find the best flight.
  • Click «Buy» when you are ready — our system will redirect you to the site that sells the selected flight ticket.
  • Fill in all passenger and payment information — passport and contact information, please double check all passengers’ names and make a payment for your itinerary.
  • That's it — you will receive an email with your e-ticket usually within 10 minutes after your flight is confirmed. Please, print the e-ticket and have it with you at the airport. You would need to have only a passport and/or a required form of ID to travel. Please, check your Visa requirements if you travel outside of the United States or Canada.

    To find a plane ticket, please select dates.

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