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Cheap Flights from Toronto to Seattle

Hi, I've summed up all the key info for Toronto to Seattle flights

Cheapest one-way

S$ 195
Westjet Sun, Sep 27

51% below next 30d avg. (S$ 400)

Cheapest return

S$ 319
Westjet Fri, Sep 25

58% below next 30d avg. (S$ 755)

Best time to book

October Cheapest month
July Peak month

Fastest flight

5h 26m Avg: 5h 23m

Recommended airlines

With a lowest one-way fare of S$ 195 , travelers can expect an average price of S$ 400 for upcoming trips, while round-trip tickets start at S$ 319 . Flights typically take around 5h 23m , but the fastest nonstop option completes the journey in just 5h 26m minutes. Flights to Seattle can arrive at: Seattle-Tacoma International Airport (SEA) , King County (Boeing Field) International Airport (BFI) and Kenmore Air Harbor Seaplane Base (LKE). The most common route connects Toronto Pearson International Airport and Seattle-Tacoma International Airport (YYZ–SEA). To secure the best rates, booking 40 days in advance is recommended, and the cheapest travel days are Tuesday, Wednesday, and Saturday .

Updated 3d ago · This content is an AI-powered summary based on Trip.com data. Prices and availability are subject to change. Please refer to actual prices, availability, and travel conditions.

Explore the cheapest one-way and round-trip flights from Toronto to Seattle over the next 90 days, with one-way fares from S$ 195 and round-trip from S$ 319. Based on Trip.com's latest 7-day flight data.

      • Cheapest nonstop
        YYZ 19:20
        5h 19m
        Direct
        SEA 21:39
        Toronto - Seattle | Sat, Oct 24 | Air Canada
        SEA 07:45
        4h 40m
        Direct
        YYZ 15:25
        Seattle - Toronto | Tue, Oct 27 | Air Canada
        S$ 509 S$ 551
        8% off
        8% off
        S$ 551 S$ 509
      • YYZ 16:55
        5h 31m
        Direct
        SEA 19:26
        Toronto - Seattle | Sat, Oct 24 | Alaska Airlines
        SEA 08:20
        4h 45m
        Direct
        YYZ 16:05
        Seattle - Toronto | Tue, Oct 27 | Alaska Airlines
        S$ 512 S$ 551
        7% off
        7% off
        S$ 551 S$ 512
      • YYZ 13:30
        8h 15m
        1 stop
        SEA 18:45
        Toronto - Seattle | Fri, Sep 25 | Westjet
        SEA 19:35
        7h 10m
        1 stop
        YYZ 05:45
        Seattle - Toronto | Thu, Oct 1 | Westjet
        S$ 319 S$ 551
        42% off
        42% off
        S$ 551 S$ 319
      • YYZ 12:00
        9h 45m
        1 stop
        SEA 18:45
        Toronto - Seattle | Thu, Sep 24 | Westjet
        SEA 10:30
        9h 15m
        1 stop
        YYZ 22:45
        Seattle - Toronto | Thu, Oct 1 | Westjet
        S$ 352
        36% off
        S$ 551 S$ 352
      • YYZ 07:00
        14h 45m
        1 stop
        SEA 18:45
        Toronto - Seattle | Wed, Sep 16 | Westjet
        SEA 19:35
        7h 10m
        1 stop
        YYZ 05:45
        Seattle - Toronto | Sat, Sep 19 | Westjet
        S$ 353
        36% off
        S$ 551 S$ 353
      • YYZ 12:00
        9h 45m
        1 stop
        SEA 18:45
        Toronto - Seattle | Fri, Oct 2 | Westjet
        SEA 10:30
        9h 15m
        1 stop
        YYZ 22:45
        Seattle - Toronto | Thu, Oct 8 | Westjet
        S$ 354
        36% off
        S$ 551 S$ 354
      • YYZ 12:00
        9h 45m
        1 stop
        SEA 18:45
        Toronto - Seattle | Sat, Oct 3 | Westjet
        SEA 19:35
        8h 20m
        1 stop
        YYZ 06:55
        Seattle - Toronto | Thu, Oct 8 | Westjet
        S$ 354
        36% off
        S$ 551 S$ 354
      • YYZ 12:00
        9h 45m
        1 stop
        SEA 18:45
        Toronto - Seattle | Wed, Oct 14 | Westjet
        SEA 10:30
        7h 45m
        1 stop
        YYZ 21:15
        Seattle - Toronto | Sun, Oct 18 | Westjet
        S$ 354
        36% off
        S$ 551 S$ 354
      • YYZ 22:25
        14h 15m
        1 stop
        SEA 09:40
        Toronto - Seattle | Sat, Sep 26 | Westjet
        SEA 10:30
        7h 45m
        1 stop
        YYZ 21:15
        Seattle - Toronto | Wed, Sep 30 | Westjet
        S$ 363
        34% off
        S$ 551 S$ 363
      • YYZ 22:25
        14h 15m
        1 stop
        SEA 09:40
        Toronto - Seattle | Tue, Sep 15 | Westjet
        SEA 19:35
        7h 10m
        1 stop
        YYZ 05:45
        Seattle - Toronto | Thu, Sep 17 | Westjet
        S$ 378
        31% off
        S$ 551 S$ 378
      • YYZ 13:30
        8h 15m
        1 stop
        SEA 18:45
        Toronto - Seattle | Fri, Oct 16 | Westjet
        SEA 10:30
        9h 15m
        1 stop
        YYZ 22:45
        Seattle - Toronto | Tue, Oct 20 | Westjet
        S$ 381
        31% off
        S$ 551 S$ 381
      • YYZ 13:30
        8h 15m
        1 stop
        SEA 18:45
        Toronto - Seattle | Tue, Oct 6 | Westjet
        SEA 10:30
        7h 45m
        1 stop
        YYZ 21:15
        Seattle - Toronto | Sat, Oct 10 | Westjet
        S$ 383
        30% off
        S$ 551 S$ 383
      • YTO 13:00
        17h 25m
        1 stop
        SEA 14:00
        Toronto - Seattle | Mon, Sep 14 | Normal Airline
        SEA 15:00
        6h
        Direct
        YTO 16:00
        Seattle - Toronto | Wed, Sep 16 | Normal Airline
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      • Cheapest nonstop
        YYZ 18:25
        5h 29m
        Direct
        SEA 20:54
        Toronto - Seattle | Fri, Nov 6 | Air Canada
        S$ 270 S$ 307
        12% off
        12% off
        S$ 307 S$ 270
      • YYZ 19:50
        5h 26m
        Direct
        SEA 22:16
        Toronto - Seattle | Fri, Oct 30 | Air Canada
        S$ 285 S$ 307
        7% off
        7% off
        S$ 307 S$ 285
      • YYZ 12:00
        9h 45m
        1 stop
        SEA 18:45
        Toronto - Seattle | Sun, Sep 27 | Westjet
        S$ 195 S$ 307
        36% off
        36% off
        S$ 307 S$ 195
      • YYZ 12:00
        9h 45m
        1 stop
        SEA 18:45
        Toronto - Seattle | Fri, Oct 16 | Westjet
        S$ 196
        36% off
        S$ 307 S$ 196
      • YYZ 12:00
        9h 45m
        1 stop
        SEA 18:45
        Toronto - Seattle | Fri, Oct 23 | Westjet
        S$ 209
        32% off
        S$ 307 S$ 209
      • YYZ 12:00
        9h 45m
        1 stop
        SEA 18:45
        Toronto - Seattle | Thu, Oct 22 | Westjet
        S$ 209
        32% off
        S$ 307 S$ 209
      • YYZ 12:00
        9h 45m
        1 stop
        SEA 18:45
        Toronto - Seattle | Wed, Oct 21 | Westjet
        S$ 209
        32% off
        S$ 307 S$ 209
      • YYZ 12:00
        9h 45m
        1 stop
        SEA 18:45
        Toronto - Seattle | Sat, Oct 24 | Westjet
        S$ 212
        31% off
        S$ 307 S$ 212
      • YYZ 12:00
        9h 45m
        1 stop
        SEA 18:45
        Toronto - Seattle | Thu, Oct 15 | Westjet
        S$ 212
        31% off
        S$ 307 S$ 212
      • YYZ 12:00
        9h 45m
        1 stop
        SEA 18:45
        Toronto - Seattle | Tue, Oct 20 | Westjet
        S$ 212
        31% off
        S$ 307 S$ 212
      • YYZ 12:00
        9h 45m
        1 stop
        SEA 18:45
        Toronto - Seattle | Wed, Sep 30 | Westjet
        S$ 215
        30% off
        S$ 307 S$ 215
      • YYZ 07:00
        30h 59m
        1 stop
        SEA 10:59
        Toronto - Seattle | Sat, Nov 7 | Porter Airlines
        S$ 215
        30% off
        S$ 307 S$ 215
      • YTO 13:00
        17h 25m
        1 stop
        SEA 14:00
        Toronto - Seattle | Mon, Sep 14 | Normal Airline
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        Find more flights

Flight.News
Over the past 7 days, flights from Toronto to Seattle have operated an average of 4 times per day, with 21.1% on-time departure rate and 47.4% on-time arrival rate.

Which airlines are the most popular for Toronto to Seattle flights?

You can choose from 1 airlines that fly from Toronto to Seattle, including Alaska Airlines, Westjet offers the lowest prices on this route.
Alaska Airlines logo Alaska Airlines
Airlines are determined based on actual purchased flight tickets from Toronto to Seattle according to previous 12 months data from Trip.com.

Flying from Toronto to Seattle

The distance between Toronto and Seattle is approximately 3,325.49km. It takes around 5 hours 23 minutes on average to fly from Toronto to Seattle. Based on Trip.com's data, travel demand peaks in July. The off-season for travel is October.

Cheapest one-way flight price S$ 195
Cheapest return ticket price S$ 319
Off-season for travel October
Peak season for travel July
Flight distance 3,325.49km
Average flight time 5 hours 23 minutes
Popular airline Alaska Airlines
Frequency ～8/week
Flight statistics for the Toronto–Seattle route are based on aggregated booking data from Trip.com over the past 12 months.

Trip.com Price Insights on Flights from Toronto to Seattle.

What is the cheapest month for one-way flights from Toronto to Seattle?

The average price of one-way flights from Toronto to Seattle purchased by Trip.com users by month over the past 12 months.

Based on Trip.com’s data, the cheapest month for flights from Toronto to Seattle is March, with an average price of S$ 236, and the most expensive month is July, with an average price of up to S$ 449.

S$ 449
S$ 343
S$ 236
S$ 130
    Cheapest
  • S$ 351
    Sep
  • S$ 335
    Oct
  • S$ 284
    Nov
  • S$ 381
    Dec
  • S$ 314
    Jan
  • S$ 280
    Feb
  • S$ 236
    Mar
  • S$ 289
    Apr
  • S$ 355
    May
  • S$ 305
    Jun
  • S$ 449
    Jul
  • S$ 447
    Aug

What is the cheapest month for round-trip flights from Toronto to Seattle?

The average price of round-trip flights from Toronto to Seattle purchased by Trip.com users by month over the past 12 months.

Based on Trip.com’s data, the cheapest month for round-trip flights from Toronto to Seattle is September, with an average price of S$ 263, and the most expensive month is June, with an average price of up to S$ 582.

S$ 582
S$ 423
S$ 263
S$ 104
  • S$ 263
    Sep
  • S$ 377
    Oct
  • S$ 399
    Nov
  • S$ 415
    Dec
  • S$ 271
    Jan
  • S$ 337
    Feb
  • S$ 307
    Mar
  • S$ 446
    Apr
  • S$ 481
    May
  • S$ 582
    Jun
  • S$ 474
    Jul
  • S$ 561
    Aug

Frequently Asked Questions

  • Which airlines offer the cheapest flights from Toronto to Seattle?

    Based on Trip.com data, Westjet offers Cheapest nonstop one-way flights from S$ 195 (for example, YYZ–SEA on Sun, Sep 27). For a Cheapest nonstop return flight, Westjet offers fares from S$ 319, departing on Fri, Sep 25 and returning on Thu, Oct 1.
  • At the moment, you can catch a direct flight from Toronto to Seattle with the following airlines, including: Alaska Airlines Selected airlines are based on historical data collected from flight bookings users made on Trip.com within the last 90 days.
  • It takes about 5 hours 23 minutes to fly from Toronto (YTO) to Seattle (SEA).
  • By analyzing data from all airlines on the Trip.com flight calendar, it looks like the best time to book a flight from Toronto to Seattle is around 40 days (6 weeks) in advance, and the best time to fly is usually on Tuesday, Wednesday, and Saturday. Tuesday typically offers the cheapest flights for departure, while Saturday offers the best return deals.
  • On average, 12 direct flights operate each week between Toronto and Seattle. See below the schedules of the main airlines serving this route:
    Alaska Airlines: S/M/T/W/T/F/S – AS391 (departure at 17:02)
  • Here are some tips for finding the best flight deals from Toronto to Seattle on Trip.com:
    · Be flexible with your travel dates. The cheapest flight is currently on Sun, Sep 27, with one-way fares from just S$ 195.
    · Compare airlines. Air Canada currently offers the lowest fares on this route.
    · Set up a price alert to track fare changes without searching every day.
    · Check Trip.com regularly for flight deals and available promo codes.
    · Avoid peak season or book early. July is generally the busiest month for travel to Seattle.
    · Get exclusive promo codes on the Trip.com app.
  • The cheapest month to book a flight from Toronto to Seattle is usually October, when demand is lower.
  • After crunching the numbers on our September flight calendar, it's currently cheapest to fly from Toronto to Seattle on September 23, 2026 with Westjet, with prices starting at S$ 317.
  • Flights to Seattle can arrive at: Seattle-Tacoma International Airport (SEA), King County (Boeing Field) International Airport (BFI) and Kenmore Air Harbor Seaplane Base (LKE). The most common route connects Toronto Pearson International Airport and Seattle-Tacoma International Airport (YYZ–SEA).
  • The time difference between Seattle and Toronto is 3h.
  • Tickets can only be changed or cancelled if permitted by airline policy. To submit a change or cancellation request, go to the flight bookings page, select the option to change or cancel your booking, choose the relevant passengers and segment, and submit a request. Please note that additional charges may apply according to the airline ticket policy. However, if the flight has been rescheduled and you would like to change or cancel your ticket, you can submit an involuntary cancellation request. For more details about change and cancellation policies, please check the customer support pages.
  • Based on Trip.com data for flights departing in the next 30 days, the average one-way fare from Toronto to Seattle is S$ 400. Fares vary by travel date, airline and availability.
  • Based on Trip.com data for travel in the next 30 days, the average round-trip fare from Toronto to Seattle is S$ 755. The final price depends on the outbound and return dates, airline and fare conditions.
  • Enter Toronto and Seattle, choose your travel dates and passengers, then compare flights by price, duration and baggage. Select a fare, review the change and cancellation rules, enter traveller details and complete payment to receive your confirmation.
  • Westjet and Porter Airlinesare the most popular budget airlines flying from Toronto to Seattle. Check baggage, seat and payment fees before comparing the final price.

Find Cheap Flights & Deals on Trip.com

Note: Prices shown on this page are the lowest estimated prices found in the last 24 hours and include all taxes and fees.

Book with no extra fees

Prices displayed on this page are all-inclusive (incl. taxes, fuel surcharges, Civil Aviation Development Fund, etc.), and all fees are shown before payment. Charges for checked baggage, meals, Wi-Fi, and other optional services may also appear in the flight cards.

Real-time pricing updates

Prices, availability, and travel information on this page have been updated within the last 24 hours, and with many routes refreshed in real time. The more popular the route, the more accurate the data.

Change & Cancellation Policy

Trip.com shows the change and cancellation rules for each ticket during the booking process, including all related fees and conditions. Please refer to the following scenarios:
Voluntary cancellation/change:
To request a change or cancellation, go to the flight bookings page, select the option to change or cancel your booking, choose the relevant passengers and flight segment, and submit your request. Please note that additional charges may apply based on the airline’s fare rules.
Cancellation/change due to a flight schedule change:
If your flight has been rescheduled and you would like to change or cancel your ticket, you can submit an involuntary cancellation request. For full details of change and cancellation policies, please refer to the customer support pages.