This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 28/12. Fares are subject to change and may not be available on all flights or dates of travel.
YTO — SEA
23 Nov — 30 Nov1
Round-trip
1 adult
Economy
Round-trip
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from Toronto to Seattle/Tacoma Intl are usually found in February or March, booked 68 days in advance, depart on a Friday or Tuesday and return on a Thursday
Cheap flight deals from Toronto to Seattle
Enter your travel dates to find the best prices.
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Cheapest flights from Toronto to Seattle
Explore the most affordable flight options available from Toronto to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 24 October 2026.
Wed 18/117:30 a.m. -
1 stop9h 10m
Wed 9/122:30 p.m. -
2 stops12h 15m
Deal found 20/10C$ 454
Fri 20/117:00 a.m. -
2 stops9h 40m
Sun 22/112:30 p.m. -
2 stops12h 15m
Deal found 21/10C$ 456
Fri 20/116:10 a.m. -
1 stop10h 30m
Mon 23/112:30 p.m. -
2 stops12h 15m
Deal found 21/10C$ 458
Mon 23/117:30 a.m. -
1 stop9h 10m
Wed 2/122:30 p.m. -
2 stops12h 15m
Deal found 21/10C$ 459
Thu 17/127:30 a.m. -
1 stop9h 10m
Wed 13/12:30 p.m. -
2 stops12h 15m
Deal found 21/10C$ 465
Tue 15/127:30 a.m. -
1 stop9h 10m
Thu 31/122:30 p.m. -
2 stops12h 15m
Deal found 20/10C$ 466
Sat 21/116:10 a.m. -
1 stop10h 30m
Sun 22/112:30 p.m. -
2 stops12h 15m
Deal found 21/10C$ 468
Fri 18/126:10 a.m. -
1 stop10h 30m
Wed 13/12:30 p.m. -
2 stops12h 15m
Deal found 21/10C$ 469
Sat 21/117:30 a.m. -
1 stop9h 10m
Sat 28/112:20 p.m. -
2 stops12h 25m
Deal found 22/10C$ 472
Tue 17/117:30 a.m. -
1 stop9h 10m
Tue 24/112:30 p.m. -
2 stops12h 15m
Deal found 20/10C$ 475
Wed 16/127:30 a.m. -
1 stop9h 10m
Thu 31/122:30 p.m. -
2 stops12h 15m
Deal found 20/10C$ 476
Thu 26/113:25 p.m. -
1 stop25h 15m
Mon 30/112:30 p.m. -
1 stop20h 55m
Deal found 19/10C$ 613
Best flights from Toronto to Seattle
Discover carefully curated flight deals from Toronto to Seattle that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated 24 October 2026.
Mon 7/125:25 p.m. -
1 stop9h 30m
Wed 9/1211:15 p.m. -
1 stop6h 40m
Deal found 23/10C$ 575
Wed 18/115:15 p.m. -
Nonstop5h 30m
Mon 7/128:33 a.m. -
Nonstop4h 32m
Deal found 19/10C$ 707
Thu 17/123:25 p.m. -
1 stop25h 15m
Wed 13/12:30 p.m. -
1 stop20h 55m
Deal found 23/10C$ 708
Fri 13/116:40 p.m. -
1 stop22h 59m
Mon 16/117:35 p.m. -
1 stop17h 39m
Deal found 23/10C$ 742
Sat 21/116:20 a.m. -
2 stops19h 18m
Sat 28/115:48 p.m. -
1 stop27h 28m
Deal found 22/10C$ 923
Sun 28/26:30 a.m. -
1 stop7h 25m
Fri 5/31:45 p.m. -
1 stop6h 15m
Deal found 20/10C$ 616
Fri 20/115:15 p.m. -
Nonstop5h 32m
Wed 9/128:33 a.m. -
Nonstop4h 32m
Deal found 19/10C$ 707
Thu 3/123:25 p.m. -
1 stop25h 15m
Sat 5/122:20 p.m. -
1 stop21h 05m
Deal found 23/10C$ 713
Sat 5/1212:20 p.m. -
1 stop11h 30m
Sat 12/127:30 a.m. -
2 stops11h 26m
Deal found 21/10C$ 662
Sun 20/125:15 p.m. -
Nonstop5h 58m
Tue 29/128:33 a.m. -
Nonstop4h 32m
Deal found 21/10C$ 711
Sat 21/115:15 p.m. -
Nonstop5h 32m
Sun 22/118:31 a.m. -
Nonstop4h 34m
Deal found 21/10C$ 711
Fri 13/116:15 a.m. -
1 stop11h 15m
Thu 3/1211:15 p.m. -
1 stop6h 40m
Deal found 23/10C$ 734
Thu 19/113:25 p.m. -
1 stop25h 15m
Wed 25/112:30 p.m. -
1 stop20h 55m
Deal found 19/10C$ 823
Fri 25/125:15 p.m. -
Nonstop5h 58m
Fri 1/18:33 a.m. -
Nonstop4h 32m
Deal found 20/10C$ 725
Thu 19/113:25 p.m. -
1 stop25h 15m
Mon 23/1111:29 a.m. -
1 stop9h 39m
Deal found 23/10C$ 970
Wed 11/116:00 a.m. -
1 stop8h 09m
Wed 2/126:00 a.m. -
1 stop8h 20m
Deal found 23/10C$ 797
Fri 20/117:05 a.m. -
1 stop8h 51m
Mon 23/112:30 p.m. -
1 stop20h 55m
Deal found 23/10C$ 983
Fri 4/126:20 a.m. -
2 stops12h 09m
Sun 13/128:59 p.m. -
2 stops8h 56m
Deal found 22/10C$ 799
Wed 2/127:05 a.m. -
1 stop8h 56m
Wed 9/1211:29 a.m. -
1 stop9h 36m
Deal found 23/10C$ 997
Mon 7/127:05 a.m. -
1 stop8h 56m
Mon 14/1211:29 a.m. -
1 stop9h 36m
Deal found 22/10C$ 1,011
Sun 22/117:05 a.m. -
1 stop8h 51m
Sun 29/1111:29 a.m. -
1 stop9h 39m
Deal found 23/10C$ 1,035
Tue 24/117:05 a.m. -
1 stop8h 51m
Tue 8/125:54 p.m. -
1 stop20h 33m
Deal found 19/10C$ 1,075
Thu 5/117:00 p.m. -
2 stops17h 32m
Sun 8/117:05 p.m. -
2 stops17h 40m
Deal found 21/10C$ 1,291
Direct flights from Toronto to Seattle
Explore direct flight options from Toronto to Seattle based on user searches, and compare prices and availability for your desired travel dates. Data last updated 24 October 2026.
Sat 21/115:15 p.m. -
Nonstop5h 32m
Sat 28/118:31 a.m. -
Nonstop4h 34m
Deal found 20/10C$ 661
Tue 8/125:15 p.m. -
Nonstop5h 41m
Tue 15/128:33 a.m. -
Nonstop4h 32m
Deal found 24/10C$ 664
Mon 7/125:15 p.m. -
Nonstop5h 41m
Mon 14/128:33 a.m. -
Nonstop4h 32m
Deal found 22/10C$ 682
Wed 2/125:15 p.m. -
Nonstop5h 41m
Wed 9/128:33 a.m. -
Nonstop4h 32m
Deal found 24/10C$ 687
Sat 21/115:15 p.m. -
Nonstop5h 32m
Tue 24/118:31 a.m. -
Nonstop4h 34m
Deal found 19/10C$ 692
Tue 15/125:15 p.m. -
Nonstop5h 41m
Tue 12/18:29 a.m. -
Nonstop4h 36m
Deal found 20/10C$ 694
Sat 21/115:15 p.m. -
Nonstop5h 32m
Sat 12/128:33 a.m. -
Nonstop4h 32m
Deal found 21/10C$ 696
Tue 22/125:15 p.m. -
Nonstop5h 58m
Tue 5/18:29 a.m. -
Nonstop4h 36m
Deal found 24/10C$ 699
Wed 16/125:15 p.m. -
Nonstop5h 41m
Sun 10/18:29 a.m. -
Nonstop4h 36m
Deal found 23/10C$ 701
Last-minute flights from Toronto to Seattle
Discover last-minute flight deals from Toronto to Seattle. Data last updated 24 October 2026 and is based on user searches.
Tue 17/117:30 a.m. -
1 stop9h 10m
Wed 9/122:30 p.m. -
2 stops12h 15m
Deal found 20/10C$ 469
Tue 17/117:30 a.m. -
1 stop9h 10m
Tue 24/112:30 p.m. -
2 stops12h 15m
Deal found 20/10C$ 475
Tue 17/117:30 a.m. -
1 stop9h 10m
Thu 10/122:30 p.m. -
2 stops12h 15m
Deal found 20/10C$ 476
Wed 18/117:30 a.m. -
1 stop9h 10m
Wed 9/122:30 p.m. -
2 stops12h 15m
Deal found 20/10C$ 454
Thu 19/117:30 a.m. -
1 stop9h 10m
Wed 9/122:30 p.m. -
2 stops12h 15m
Deal found 20/10C$ 479
Fri 20/117:00 a.m. -
2 stops9h 40m
Sun 22/112:30 p.m. -
2 stops12h 15m
Deal found 21/10C$ 456
Fri 20/116:10 a.m. -
1 stop10h 30m
Mon 23/112:30 p.m. -
2 stops12h 15m
Deal found 21/10C$ 458
Sat 21/116:10 a.m. -
1 stop10h 30m
Sun 22/112:30 p.m. -
2 stops12h 15m
Deal found 21/10C$ 468
Sat 21/117:30 a.m. -
1 stop9h 10m
Sat 28/112:20 p.m. -
2 stops12h 25m
Deal found 22/10C$ 472
Mon 23/117:30 a.m. -
1 stop9h 10m
Wed 2/122:30 p.m. -
2 stops12h 15m
Deal found 21/10C$ 459
Tue 24/113:25 p.m. -
1 stop25h 15m
Mon 30/112:30 p.m. -
1 stop20h 55m
Deal found 22/10C$ 671
Thu 26/113:25 p.m. -
1 stop25h 15m
Mon 30/112:30 p.m. -
1 stop20h 55m
Deal found 19/10C$ 613
One-way flights from Toronto to Seattle
Search for one-way flight options from Toronto to Seattle. Find affordable one-way fares based on user searches. Data last updated 24 October 2026.
Mon 28/122:10 p.m. -
2 stops26h 30m
Wed 31/1212:00 a.m. -
Nonstop0h 00m
Deal found 22/10C$ 319
Mon 23/112:10 p.m. -
2 stops26h 30m
Wed 31/1212:00 a.m. -
Nonstop0h 00m
Deal found 21/10C$ 321
Wed 11/112:10 p.m. -
2 stops26h 30m
Wed 31/1212:00 a.m. -
Nonstop0h 00m
Deal found 20/10C$ 322
Mon 4/110:20 p.m. -
1 stop18h 20m
Wed 31/1212:00 a.m. -
Nonstop0h 00m
Deal found 20/10C$ 323
Mon 7/122:10 p.m. -
2 stops26h 30m
Wed 31/1212:00 a.m. -
Nonstop0h 00m
Deal found 23/10C$ 325
Thu 12/112:10 p.m. -
2 stops26h 30m
Wed 31/1212:00 a.m. -
Nonstop0h 00m
Deal found 20/10C$ 326
Sat 21/1110:20 p.m. -
2 stops18h 20m
Wed 31/1212:00 a.m. -
Nonstop0h 00m
Deal found 23/10C$ 328
Mon 16/1110:20 p.m. -
1 stop18h 20m
Wed 31/1212:00 a.m. -
Nonstop0h 00m
Deal found 24/10C$ 329
Fri 20/115:10 p.m. -
1 stop23h 30m
Wed 31/1212:00 a.m. -
Nonstop0h 00m
Deal found 22/10C$ 330
Sun 10/110:20 p.m. -
2 stops18h 20m
Wed 31/1212:00 a.m. -
Nonstop0h 00m
Deal found 20/10C$ 332
Thu 18/34:25 p.m. -
1 stop25h 15m
Wed 31/1212:00 a.m. -
Nonstop0h 00m
Deal found 19/10C$ 333
Fri 11/125:15 p.m. -
1 stop9h 38m
Wed 31/1212:00 a.m. -
Nonstop0h 00m
Deal found 24/10C$ 335
Find flight deals from Toronto to Seattle
Discover tips and strategies to find the most affordable flight options for your journey from Toronto (YTO) to Seattle (SEA). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 24 October 2026.
Customize your flight search to find flights from Toronto to Seattle 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, Cheapflights users made 7,457,451 searches. Data last updated 24 October 2026.
Use the filters below to find and compare flights from Toronto to Seattle that are best for you.
Fly from
Fly to
Route
Depart
Return
Price
Cheapest round-trip
HamiltonSeattle
YHM Hamilton - SEA Seattle/Tacoma Intl
YHMSEA
Hamilton
Tue 24/11
3:25 p.m.-1:40 p.m.
1 stop25h 15m
Seattle/Tacoma Intl
Wed 31/12
12:00 a.m.-3:00 a.m.
Nonstop0h 00m
C$ 368
HamiltonSeattle
YHM Hamilton - SEA Seattle/Tacoma Intl
YHMSEA
Hamilton
Tue 1/12
3:25 p.m.-1:40 p.m.
1 stop25h 15m
Seattle/Tacoma Intl
Wed 31/12
12:00 a.m.-3:00 a.m.
Nonstop0h 00m
C$ 379
TorontoSeattle
YYZ Toronto Pearson Intl - SEA Seattle/Tacoma Intl
YYZSEA
Toronto Pearson Intl
Sat 19/12
5:15 p.m.-8:13 p.m.
Nonstop5h 58m
Seattle/Tacoma Intl
Wed 31/12
12:00 a.m.-3:00 a.m.
Nonstop0h 00m
C$ 382
TorontoSeattle
YYZ Toronto Pearson Intl - SEA Seattle/Tacoma Intl
YYZSEA
Toronto Pearson Intl
Wed 16/12
5:15 p.m.-7:56 p.m.
Nonstop5h 41m
Seattle/Tacoma Intl
Wed 31/12
12:00 a.m.-3:00 a.m.
Nonstop0h 00m
C$ 382
TorontoSeattle
YYZ Toronto Pearson Intl - SEA Seattle/Tacoma Intl
YYZSEA
Toronto Pearson Intl
Mon 21/12
5:15 p.m.-8:13 p.m.
Nonstop5h 58m
Seattle/Tacoma Intl
Wed 31/12
12:00 a.m.-3:00 a.m.
Nonstop0h 00m
C$ 398
TorontoSeattle
YYZ Toronto Pearson Intl - SEA Seattle/Tacoma Intl
YYZSEA
Toronto Pearson Intl
Sun 20/12
5:15 p.m.-8:13 p.m.
Nonstop5h 58m
Seattle/Tacoma Intl
Wed 31/12
12:00 a.m.-3:00 a.m.
Nonstop0h 00m
C$ 398
TorontoSeattle
YYZ Toronto Pearson Intl - SEA Seattle/Tacoma Intl
YYZSEA
Toronto Pearson Intl
Thu 17/12
5:15 p.m.-8:13 p.m.
Nonstop5h 58m
Seattle/Tacoma Intl
Wed 31/12
12:00 a.m.-3:00 a.m.
Nonstop0h 00m
C$ 398
TorontoSeattle
YYZ Toronto Pearson Intl - SEA Seattle/Tacoma Intl
YYZSEA
Toronto Pearson Intl
Fri 4/12
5:15 p.m.-7:56 p.m.
Nonstop5h 41m
Seattle/Tacoma Intl
Wed 31/12
12:00 a.m.-3:00 a.m.
Nonstop0h 00m
C$ 399
Quickest round-trip
TorontoSeattle
YYZ Toronto Pearson Intl - SEA Seattle/Tacoma Intl
YYZSEA
Toronto Pearson Intl
Fri 27/11
5:15 p.m.-7:47 p.m.
Nonstop5h 32m
Seattle/Tacoma Intl
Wed 31/12
12:00 a.m.-3:00 a.m.
Nonstop0h 00m
C$ 402
TorontoSeattle
YYZ Toronto Pearson Intl - SEA Seattle/Tacoma Intl
YYZSEA
Toronto Pearson Intl
Mon 30/11
5:15 p.m.-7:47 p.m.
Nonstop5h 32m
Seattle/Tacoma Intl
Wed 31/12
12:00 a.m.-3:00 a.m.
Nonstop0h 00m
C$ 403
Flights are sorted by cheapest round-trip flights first.
Deals found on 21/10
Showing 1-10 of 51 resultsSorted by cheapest first
1
2
3
...
6
Best time to book a flight from Toronto to Seattle
Have a flexible travel schedule? Discover the best time to fly to Seattle from Toronto with our price prediction graph.
YTO-SEA
YYZ-SEA
YHM-SEA
YKF-SEA
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.
Cheapflights Insights
Everything you need to know about your flight from Toronto to Seattle
YTO-SEA
YYZ-SEA
YHM-SEA
YKF-SEA
What is the cheapest month to book a flight from Toronto to Seattle?
Currently, February is the cheapest month in which you can book a flight from Toronto to Seattle (average of C$ 339). Flying from Toronto to Seattle in December is currently the most expensive (average of C$ 675). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
What is the cheapest time of day to fly from YTO to SEA?
Find hourly flight availability from Toronto to Seattle. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 24 October 2026.
When flying from Toronto to Seattle, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.
How much does it cost to fly round-trip from Toronto to Seattle?
Airfare is below average for this route at the moment.
Toronto to Seattle flights typically cost between C$ 548 and C$ 790 in January.The cheapest round-trip price found within the last 5 days was C$ 448 on WestJet (22 Jan-31 Jan).
What’s the top layover airport for flights from Toronto to Seattle?
Share of one-stop round-trip flights from Toronto to Seattle chosen by Cheapflights users in the past 12 months, using the same layover each way.
Calgary (YYC) – chosen by Cheapflights users on 75% of one-stop itineraries from Toronto to Seattle on Cheapflights.
What’s the cheapest layover airport for flights from Toronto to Seattle?
Average round-trip fare for 1-stop flights from Toronto to Seattle, chosen by Cheapflights users in the past 12 months, with the same layover each way.
Washington, D.C. (IAD) is the most affordable 1-stop option, with an average round-trip price of C$ 460.
What’s the fastest layover option from Toronto to Seattle?
Shortest average travel time for 1-stop one-way flights from Toronto to Seattle, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by layover airport.
Flights via Chicago (ORD) have the shortest average one-way travel time for 1-stop routes: 7h 53m.
Which airport typically offers the quickest layover for flights from Toronto to Seattle?
Average layover duration for 1-stop one-way flights from Toronto to Seattle, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.
Flights via Philadelphia (PHL) offer the fastest connection on this route, with an average layover time of 0h 56m.
How often are flights from Toronto to Seattle delayed?
About 30% of weekly flights between Toronto and Seattle have experienced delays in the past year, with the average delay time being 154 minutes.
What is the most punctual flight time for Toronto to Seattle flights?
Historically, flights departing in the early afternoon are less likely to be delayed, whereas flights leaving in the evening tend to experience delays more often.
What day of the week experiences the fewest flight delays on this route?
Saturday tends to have the lowest number of delays on this route, whereas Monday has historically faced a higher average of delays compared to other days of the week.
Which airline has the best punctuality record on Toronto to Seattle flights?
Over the past year, Alaska Airlines has had the lowest number of delays on this route, with just 18% of flights being delayed.
How far ahead should I book a flight from Toronto to Seattle?
Booking 32 days in advance of your planned departure date is, on average, the best time to get cheap flights from Toronto to Seattle. The general trend is that the closer you book to the departure date, the more expensive your flight will be.
Reviews of airlines servicing Seattle
Get insights into the airlines that provide service to Seattle. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Seattle. Reviews last updated 24 October 2026.
Get a feel of what it's like to fly with Alaska Airlines,Delta, andUnited Airlines from Toronto to Seattle by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
It's my first time flying with Alaska Airlines. All in all it was very good. Excellent crew and the meal was really good .. best mashed potato!! Black point: not waking me up for breakfast. Having departed late from London and arriving in Seattle late at night, it would have been nice to have found a meal on the table when i woke up. Although the crew was very lovely, kind and helpful, I did find it a little regimented in their approach. Also the constant interruptions announcing what we were eating next and unnecessary announcements.
It's my first time flying with Alaska Airlines. All in all it was very good. Excellent crew and the meal was really good .. best mashed potato!! Black point: not waking me up for breakfast. Having departed late from London and arriving in Seattle late at night, it would have been nice to have found a meal on the table when i woke up. Although the crew was very lovely, kind and helpful, I did find it a little regimented in their approach. Also the constant interruptions announcing what we were eating next and unnecessary announcements.
It's my first time flying with Alaska Airlines. All in all it was very good. Excellent crew and the meal was really good .. best mashed potato!! Black point: not waking me up for breakfast. Having departed late from London and arriving in Seattle late at night, it would have been nice to have found a meal on the table when i woke up. Although the crew was very lovely, kind and helpful, I did find it a little regimented in their approach. Also the constant interruptions announcing what we were eating next and unnecessary announcements.
It's my first time flying with Alaska Airlines. All in all it was very good. Excellent crew and the meal was really good .. best mashed potato!! Black point: not waking me up for breakfast. Having departed late from London and arriving in Seattle late at night, it would have been nice to have found a meal on the table when i woke up. Although the crew was very lovely, kind and helpful, I did find it a little regimented in their approach. Also the constant interruptions announcing what we were eating next and unnecessary announcements.
It's my first time flying with Alaska Airlines. All in all it was very good. Excellent crew and the meal was really good .. best mashed potato!! Black point: not waking me up for breakfast. Having departed late from London and arriving in Seattle late at night, it would have been nice to have found a meal on the table when i woke up. Although the crew was very lovely, kind and helpful, I did find it a little regimented in their approach. Also the constant interruptions announcing what we were eating next and unnecessary announcements.
It's my first time flying with Alaska Airlines. All in all it was very good. Excellent crew and the meal was really good .. best mashed potato!! Black point: not waking me up for breakfast. Having departed late from London and arriving in Seattle late at night, it would have been nice to have found a meal on the table when i woke up. Although the crew was very lovely, kind and helpful, I did find it a little regimented in their approach. Also the constant interruptions announcing what we were eating next and unnecessary announcements.
Related info for your journey
Find useful and relevant information for your journey from Toronto to Seattle. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
What airport do you fly into for flights to Seattle from Toronto?
For a flight from Toronto to Seattle, you will be flying into Seattle/Tacoma Intl. Seattle/Tacoma Intl (SEA) is just 18.4 km from the centre of the city. Seattle/Tacoma Intl is the only Seattle airport and it handles 0 inbound flights from Toronto per day. 5 airlines have flights to Seattle/Tacoma Intl from Toronto on a regular basis.
How long is the flight from Toronto to Seattle?
Delta, Alaska Airlines, and WestJet can get you from Toronto to Seattle in just under 5h 30m. Your travel time can differ by up to 19h 45m. Airlines will cover a distance of 3306 km. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.
What are the cheapest airlines flying from Toronto to Seattle round-trip?
According to our current data, Delta (C$ 227), Alaska Airlines (C$ 271), and Air Canada (C$ 299) offers the cheapest pricing from Toronto to Seattle. These flights start at 60% lower than the current average price 3 months from now.
What are the cheapest airlines to fly from Toronto to Seattle one-way?
For one-way options, check prices for Alaska Airlines. According to our data, you can fly for as low as C$ 171. Users have also found prices from C$ 195 and C$ 230 on WestJet and Air Canada, respectively.
What are the most popular routes from Toronto to Seattle?
While some choose either Hamilton - Seattle/Tacoma Intl or Toronto Island - Seattle/Tacoma Intl, Toronto Pearson Intl - Seattle/Tacoma Intl is the most popular route from Toronto to Seattle.
What are the most reliable airlines from Toronto to Seattle?
The top 3 most reliable airlines when flying from Toronto to Seattle are Qatar Airways (100%), Alaska Airlines (83%) and Brussels Airlines (44%).
What are the cheapest flights from Toronto to Seattle?
Looking at all options, your cheapest flight can be booked for C$ 329. While the most popular route (Toronto Pearson Intl - Seattle/Tacoma Intl) can be booked for C$ 461 on average, our data indicates C$ 703 when flying from Toronto to Seattle.
Can I find deals for business class flights from Toronto to Seattle?
Yes. Cheapflights offers flight deals from Toronto to Seattle by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.
What is the cheapest month to book a flight from Toronto to Seattle?
Currently, February is the cheapest month in which you can book a flight from Toronto to Seattle (average of C$ 339). Flying from Toronto to Seattle in December is currently the most expensive (average of C$ 675). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
Book flights to Seattle if you plan to visit one of these locations
SeaTac
Kent
Tukwila
Mukilteo
Ellensburg
Renton
Lynnwood
Cashmere
Tacoma
Marysville
Federal Way
Kirkland
Leavenworth
Browse thousands of different options on Cheapflights for your next trip
Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.
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Fly from Toronto to Seattle on these airlines
Choose from the following airlines for your flight from Toronto to Seattle. Flights are based on user searches made on Cheapflights and were last updated on 24 October 2026.
Explore flights to Seattle departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on 24 October 2026.
Discover the top 5 airlines that operate flights from Toronto to Seattle. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 7,457,451 searches. Data last updated 24 October 2026.
Find the best flight deals on Cheapflights, where travelers can enjoy low prices and a wide availability of flights to their desired destinations.
How does Cheapflights help users find flights from Toronto to Seattle?
Deals for Toronto to Seattle flights are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose better, like price, airport, cabin class, and plenty of other options.
Why should you use Cheapflights to find cheap flight tickets from Toronto to Seattle?
Millions of users choose and trust Cheapflights to book the best flight deals from Toronto to Seattle for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.
Can Cheapflights find flights from Toronto to Seattle with no change fees?
Users can book flights with no change fees policies with our dedicated filters. Book flights from Toronto to Seattle flexibly with Cheapflights today.
Can Cheapflights notify me if prices for flights from Toronto to Seattle become cheaper?
Yes, Cheapflights offers price alerts on Toronto to Seattle flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.
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