Cheap Flights from Seattle, WA to Toronto, ON from $129

One way Round trip

Adults

Children under 12

Infants under 2 without place

Economy

Business

First

done

Return flight: Toronto – Seattle

Page navigation

Price Calendar Cheap Flights Flights Schedule

On Cheapflightsplus.com you will find 3 direct and 997 connecting flights from Seattle to Toronto. You can compare airfare deals from 8 airlines and multiple travel sites from $129, book and save on cheap plane tickets and last minute offers. Also check out SEA-YTO flight schedule to find best flight time, convenient departure and arrival airports.

Find One-Way and Round-Trip Seattle to Toronto 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: $129 (one-way), $221 (round-trip).

Direct flights

Check to choose departure date Check to choose departure date

Check prices for return flight

Find flights

Best Flights from Seattle to Toronto Today

Take a look at the list of non stop flights and flights with layovers from Seattle to Toronto with the lowest price of $129. The fastest direct flight takes 4h 37m and the fastest connecting – 6h 11m.

Price	Departure	Arrival	Flight Duration	Airline	Flight
from $151 Find flight	07:23 Seattle Seattle-Tacoma Intl	15:00 Toronto Pearson International	4h 37m	Alaska Airlines	AS972
from $359 Find flight	11:35 Seattle Seattle-Tacoma Intl	19:15 Toronto Pearson International	4h 40m	Air Canada	AC540
from $361 Find flight	11:35 Seattle Seattle-Tacoma Intl	19:15 Toronto Pearson International	4h 40m	United Airlines	UA8031
from $129 Find flight	17:50 Seattle Seattle-Tacoma Intl	11:57+1 день Toronto Toronto Island	15h 7m layover 9h 16m - Chicago	Hawaiian Airlines	HA6819 PD2388
from $135 Find flight	17:55 Seattle Seattle-Tacoma Intl	11:57+1 день Toronto Toronto Island	15h 2m layover 9h 16m - Chicago	Alaska Airlines	AS538 PD2388
from $146 Find flight	14:55 Seattle Seattle-Tacoma Intl	05:50+1 день Toronto Pearson International	11h 55m layover 2h 0m - Vancouver 3h 27m - Calgary	Air Canada	AC8807 AC224 AC154
from $153 Find flight	23:20 Seattle Seattle-Tacoma Intl	13:04+1 день Toronto Pearson International	10h 44m layover 1h 1m - Washington D.C. 1h 57m - Ottawa	United Airlines	UA2019 UA4562 UA8459

Show all tickets

*Departure and arrival times - local. Prices indicated for one-way flights. Information updated on September 16, 2025

Flight Schedule Seattle (Washington) to Toronto (Ontario)

Full flight schedule will help you in detecting at what time planes fly from Seattle to Toronto. 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	Flight Details	Flight Duration	Price
05:00 — 22:36	05:00 — 11:19 UA1668 United Airlines Seattle — Houston 6h 56m stop 18:13 — 22:36 UA313 United Airlines Houston — Toronto	14h 36m including layover	Find flight from$142
07:20 — 19:46	07:20 — 15:30 AC512 Air Canada Seattle — Montreal 2h 56m stop 18:25 — 19:50 AC7975 Air Canada Montreal — Toronto	9h 26m including layover	Find flight from$149
07:23 — 15:00	07:23 — 15:00 AS972 Alaska Airlines Seattle — Toronto	4h 37m	Find flight from$151
11:35 — 19:15	11:35 — 19:15 AC540 Air Canada Seattle — Toronto	4h 40m	Find flight from$359
11:35 — 19:15	11:35 — 19:15 UA8031 United Airlines Seattle — Toronto	4h 40m	Find flight from$361
13:00 — 10:04 +1 day	13:00 — 20:57 UA2275 United Airlines Seattle — Washington D.C. 11h 25m stop 08:22 — 10:04 UA3612 United Airlines Washington D.C. — Toronto	18h 4m including layover	Find flight from$142
13:39 — 11:57 +1 day	13:39 — 19:48 AS410 Alaska Airlines Seattle — Chicago 13h 27m stop 09:15 — 11:57 PD2388 Porter Airlines Chicago — Toronto	19h 18m including layover	Find flight from$135
13:45 — 00:05 +1 day	13:45 — 14:50 AC8805 Air Canada Seattle — Vancouver 1h 37m stop 16:30 — 00:09 AC186 Air Canada Vancouver — Toronto	7h 20m including layover	Find flight from$149
13:45 — 01:05 +1 day	13:45 — 14:50 AC8805 Air Canada Seattle — Vancouver 2h 37m stop 17:30 — 01:09 AC124 Air Canada Vancouver — Toronto	8h 20m including layover	Find flight from$149
14:55 — 05:50 +1 day	14:55 — 16:00 AC8807 Air Canada Seattle — Vancouver 2h stop 18:00 — 20:28 AC224 Air Canada Vancouver — Calgary 3h 27m stop 23:55 — 05:50 AC154 Air Canada Calgary — Toronto	11h 55m including layover	Find flight from$146
14:55 — 05:50 +1 day	14:55 — 16:00 AC8807 Air Canada Seattle — Vancouver 3h 30m stop 19:30 — 21:55 AC226 Air Canada Vancouver — Calgary 2h stop 23:55 — 05:50 AC154 Air Canada Calgary — Toronto	11h 55m including layover	Find flight from$146
14:55 — 06:45 +1 day	14:55 — 16:00 AC8807 Air Canada Seattle — Vancouver 3h stop 19:00 — 21:35 AC246 Air Canada Vancouver — Edmonton 3h 20m stop 00:55 — 06:45 AC178 Air Canada Edmonton — Toronto	12h 50m including layover	Find flight from$146
17:50 — 11:57 +1 day	17:55 — 23:59 HA6819 Hawaiian Airlines Seattle — Chicago 9h 16m stop 09:40 — 12:22 PD2388 Porter Airlines Chicago — Toronto	15h 7m including layover	Find flight from$129
17:55 — 11:57 +1 day	17:55 — 23:59 AS538 Alaska Airlines Seattle — Chicago 9h 16m stop 09:40 — 12:22 PD2388 Porter Airlines Chicago — Toronto	15h 2m including layover	Find flight from$135
22:05 — 14:19 +1 day	22:05 — 06:02 UA2402 United Airlines Seattle — Washington D.C. 6h 38m stop 12:40 — 14:19 UA3490 United Airlines Washington D.C. — Toronto	13h 14m including layover	Find flight from$142

Departure	Arrival	Flight Details	Flight Time	Price
		stop stop	including layover	Find flight from$

*Departure and arrival times - local. Updated on September 16, 2025

Flight Information

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

Distance between Seattle and Toronto is 3326 miles. Time difference between the cities is 3h. Airplanes depart 00:17 to 23:59 from 3 Seattle airports and arrive 00:17 to 23:59 to 3 Toronto airports. Average flight time is 4h 40m.

The fastest flight 4h 37m
Average flight time 4h 40m
The earliest flight 00:17
The latest flight 23:59
Distance 2067 ml

The cheapest months to travel to Toronto are october (from 129 $), september (from 135 $), june (from 142 $).

The most expensive months are november (from 517 $), december (from 208 $), february (from 185 $).

What is the lowest airfare Seattle to Toronto?

The cheapest plane ticket found by our users is $129. This airfare is for economy class on one-way HA6819 flight by Hawaiian Airlines for October 7, 2025 which leaves Seattle-Tacoma Intl in Seattle at 17:50 am and arrives at Toronto Toronto Island at 11:57.

Economy class

$129

Find

Business class

Find

First class

Find

Popular Airlines on the Route

The flight Seattle — Toronto is served by 8 regular airlines and 4 low-cost airlines. Most of the flights on this route are operated by Alaska Airlines - 185 departures per week at the price of from $ 135 . And the most expensive tickets are offered by Hawaiian Airlines airline - from $ 1161.

Direct flights

There are 3 nonstop flights on the route. The fastest direct flight is AS972 by Alaska Airlines takes 4h 37m and the cheapest is HA6819 by Hawaiian Airlines for $151.

AS - Alaska Airlines

from $151

Find
AC - Air Canada

from $359

Find
UA - United Airlines

from $361

Find

See more direct flights

Connecting Flights

There are 997 flights with layovers on the route. The fastest connecting flight is SY284 by Sun Country Airlines takes 6h 11m and the cheapest is HA6819 by Hawaiian Airlines for $129.

AS - Alaska Airlines

from $135

Find
AC - Air Canada

from $146

Find
F9 - Frontier Airlines

from $155

Find
SY - Sun Country Airlines

from $169

Find
HA - Hawaiian Airlines

from $129

Find
UA - United Airlines

from $142

Find
WS - WestJet

from $189

Find
NK - Spirit Airlines

from $164

Find

See more connecting flights

Airports

You can fly from Seattle to Toronto from 3 airports (Boeing Field International Airport, Seattle-Tacoma Intl, Kenmore Air Harbor SPB).

Seattle airports

Boeing Field International Airport-BFI

Find
Seattle-Tacoma Intl-SEA

from $129
Find
Kenmore Air Harbor SPB-LKE

Find

Toronto airports

Buttonville Municipal-YKZ

Find
Toronto Island-YTZ

Find
Pearson International-YYZ

Find

Airplanes

There are flights to Toronto from Seattle by 8 airlines that use 1 aircraft brands. They range from huge modern airplanes to small-sized.

Canadair Regional Jet 900

from $149

Find

Top Domestic Destinations from Seattle

You may also consider searching for discounted plane tickets to some other popular places from Seattle within United States.

Seattle — Washington D.C.

from $78

Find
Seattle — Las Vegas

from $62

Find
Seattle — New York

from $180

Find
Seattle — Chicago

from $73

Find
Seattle — Phoenix

from $67

Find
Seattle — San Diego

from $74

Find
Seattle — Los Angeles

from $53

Find
Seattle — Denver

from $243

Find
Seattle — Dallas

from $72

Find
Seattle — Boston

from $63

Find

Top International Destinations from Seattle

Our state-of-the art metasearch will definitely provide you with the best airfare on international flights. We’re proud to partner with many reliable travel suppliers located outside the US what gives us an opportunity to offer the most competitive prices on far destinations.

Seattle — Tokyo

from $77

Find
Seattle — London

from $70

Find
Seattle — Vancouver

from $57

Find
Seattle — Cancun

from $63

Find
Seattle — Paris

from $66

Find
Seattle — Toronto

from $64

Find
Seattle — Calgary

from $76

Find
Seattle — Mumbai

from $80

Find
Seattle — Montreal

from $68

Find
Seattle — Amsterdam

from $64

Find

How to book a plane 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.