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Flights from Seattle to Toronto

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

Cheapest one-way

$ 128
WestJet Tue, Sep 22

58% below next 30d avg. ($304)

Cheapest round-trip

$ 311
WestJet Thu, Oct 8

46% below next 30d avg. ($572)

When to travel

October Cheapest month
July Peak month

Fastest flight

4h 40m 3m faster than avg. (4h 43m)

Recommended airlines

With a lowest one-way fare of $128 , travelers can expect an average price of $304 for upcoming trips, while round-trip tickets start at $311 . Flights typically take around 4h 43m , but the fastest nonstop option completes the journey in just 4h 40m minutes. There are 14 flights weekly on this route. You can arrive at any of the following airports in Toronto: Toronto Pearson International Airport (YYZ) , Billy Bishop Toronto City Airport (YTZ) , John C. Munro Hamilton International Airport (YHM) , and Region of Waterloo International Airport (YKF) . Flights from Seattle-Tacoma International Airport to Toronto Pearson International Airport (SEA-YYZ) are by far the most popular option for this route. 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 Seattle to Toronto over the next 90 days, with one-way fares from $128 and round-trip from $311. Based on Trip.com's latest 7-day flight data.

      • Cheapest nonstop
        SEA 8:00 AM
        4h 41m
        Nonstop
        YYZ 3:41 PM
        Seattle - Toronto | Tue, Sep 29 | Air Canada
        YYZ 4:55 PM
        5h 31m
        Nonstop
        SEA 7:26 PM
        Toronto - Seattle | Sat, Oct 3 | Alaska Airlines
        $444 $484
        8% off
        8% off
        $484 $444
      • SEA 7:52 AM
        4h 53m
        Nonstop
        YYZ 3:45 PM
        Seattle - Toronto | Tue, Sep 29 | Alaska Airlines
        YYZ 4:55 PM
        5h 31m
        Nonstop
        SEA 7:26 PM
        Toronto - Seattle | Sat, Oct 3 | Alaska Airlines
        $450 $484
        7% off
        7% off
        $484 $450
      • SEA 10:30 AM
        9h 15m
        1 stop
        YYZ 10:45 PM
        Seattle - Toronto | Thu, Oct 8 | WestJet
        YYZ 1:30 PM
        8h 15m
        1 stop
        SEA 6:45 PM
        Toronto - Seattle | Thu, Oct 15 | WestJet
        $311 $484
        36% off
        36% off
        $484 $311
      • SEA 7:35 PM
        7h 10m
        1 stop
        YYZ 5:45 AM
        Seattle - Toronto | Sat, Sep 26 | WestJet
        YYZ 12:00 PM
        9h 45m
        1 stop
        SEA 6:45 PM
        Toronto - Seattle | Wed, Sep 30 | WestJet
        $313
        35% off
        $484 $313
      • SEA 7:35 PM
        8h 20m
        1 stop
        YYZ 6:55 AM
        Seattle - Toronto | Tue, Sep 22 | WestJet
        YYZ 12:00 PM
        9h 45m
        1 stop
        SEA 6:45 PM
        Toronto - Seattle | Tue, Sep 29 | WestJet
        $314
        35% off
        $484 $314
      • SEA 7:35 PM
        7h 10m
        1 stop
        YYZ 5:45 AM
        Seattle - Toronto | Mon, Sep 28 | WestJet
        YYZ 12:00 PM
        9h 45m
        1 stop
        SEA 6:45 PM
        Toronto - Seattle | Wed, Sep 30 | WestJet
        $315
        35% off
        $484 $315
      • SEA 7:35 PM
        8h 20m
        1 stop
        YYZ 6:55 AM
        Seattle - Toronto | Mon, Sep 21 | WestJet
        YYZ 12:00 PM
        9h 45m
        1 stop
        SEA 6:45 PM
        Toronto - Seattle | Wed, Sep 23 | WestJet
        $315
        35% off
        $484 $315
      • SEA 7:35 PM
        7h 10m
        1 stop
        YYZ 5:45 AM
        Seattle - Toronto | Wed, Sep 16 | WestJet
        YYZ 12:00 PM
        9h 45m
        1 stop
        SEA 6:45 PM
        Toronto - Seattle | Wed, Sep 23 | WestJet
        $317
        35% off
        $484 $317
      • SEA 7:35 PM
        8h 20m
        1 stop
        YYZ 6:55 AM
        Seattle - Toronto | Mon, Oct 19 | WestJet
        YYZ 12:00 PM
        9h 45m
        1 stop
        SEA 6:45 PM
        Toronto - Seattle | Thu, Oct 22 | WestJet
        $317
        35% off
        $484 $317
      • SEA 7:35 PM
        7h 10m
        1 stop
        YYZ 5:45 AM
        Seattle - Toronto | Wed, Sep 30 | WestJet
        YYZ 12:00 PM
        9h 45m
        1 stop
        SEA 6:45 PM
        Toronto - Seattle | Tue, Oct 6 | WestJet
        $321
        34% off
        $484 $321
      • SEA 7:35 PM
        8h 20m
        1 stop
        YYZ 6:55 AM
        Seattle - Toronto | Tue, Sep 29 | WestJet
        YYZ 1:30 PM
        8h 15m
        1 stop
        SEA 6:45 PM
        Toronto - Seattle | Tue, Oct 6 | WestJet
        $322
        33% off
        $484 $322
      • SEA 7:35 PM
        8h 20m
        1 stop
        YYZ 6:55 AM
        Seattle - Toronto | Tue, Sep 15 | WestJet
        YYZ 12:00 PM
        9h 45m
        1 stop
        SEA 6:45 PM
        Toronto - Seattle | Tue, Sep 22 | WestJet
        $325
        33% off
        $484 $325
      • SEA 1:00 PM
        17h 25m
        1 stop
        YTO 2:00 PM
        Seattle - Toronto | Mon, Sep 14 | Normal Airline
        YTO 3:00 PM
        6h
        Nonstop
        SEA 4:00 PM
        Toronto - Seattle | Wed, Sep 16 | Normal Airline
        Find more flights
        Find more flights
      • Cheapest nonstop
        SEA 7:45 AM
        4h 40m
        Nonstop
        YYZ 3:25 PM
        Seattle - Toronto | Sun, Nov 1 | Air Canada
        $196 $213
        8% off
        8% off
        $213 $196
      • SEA 8:00 AM
        4h 50m
        Nonstop
        YYZ 3:50 PM
        Seattle - Toronto | Sun, Sep 20 | Air Canada
        $198 $213
        7% off
        7% off
        $213 $198
      • SEA 7:35 PM
        8h 20m
        1 stop
        YYZ 6:55 AM
        Seattle - Toronto | Tue, Sep 22 | WestJet
        $128 $213
        40% off
        40% off
        $213 $128
      • SEA 7:35 PM
        7h 10m
        1 stop
        YYZ 5:45 AM
        Seattle - Toronto | Fri, Sep 18 | WestJet
        $128
        40% off
        $213 $128
      • SEA 10:30 AM
        9h 15m
        1 stop
        YYZ 10:45 PM
        Seattle - Toronto | Thu, Oct 22 | WestJet
        $135
        37% off
        $213 $135
      • SEA 7:35 PM
        7h 10m
        1 stop
        YYZ 5:45 AM
        Seattle - Toronto | Sat, Oct 3 | WestJet
        $146
        31% off
        $213 $146
      • SEA 10:30 AM
        9h 15m
        1 stop
        YYZ 10:45 PM
        Seattle - Toronto | Sat, Oct 10 | WestJet
        $146
        31% off
        $213 $146
      • SEA 7:35 PM
        8h 20m
        1 stop
        YYZ 6:55 AM
        Seattle - Toronto | Sat, Sep 26 | WestJet
        $146
        31% off
        $213 $146
      • SEA 7:35 PM
        8h 20m
        1 stop
        YYZ 6:55 AM
        Seattle - Toronto | Tue, Sep 29 | WestJet
        $147
        31% off
        $213 $147
      • SEA 10:30 AM
        9h 15m
        1 stop
        YYZ 10:45 PM
        Seattle - Toronto | Fri, Oct 23 | WestJet
        $147
        31% off
        $213 $147
      • SEA 10:30 AM
        9h 15m
        1 stop
        YYZ 10:45 PM
        Seattle - Toronto | Wed, Sep 30 | WestJet
        $148
        31% off
        $213 $148
      • SEA 10:30 AM
        9h 15m
        1 stop
        YYZ 10:45 PM
        Seattle - Toronto | Sat, Oct 17 | WestJet
        $148
        31% off
        $213 $148
      • SEA 1:00 PM
        17h 25m
        1 stop
        YTO 2:00 PM
        Seattle - Toronto | Mon, Sep 14 | Normal Airline
        Find more flights
        Find more flights

Flight.News
Flights from Seattle to Toronto operate an average of 5 times per day over the past 7 days, with a 53.3% on-time departure rate and a 80.8% on-time arrival rate.

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

The most popular airlines flying from Seattle to Toronto are WestJet, Air Canada, and Alaska Airlines, among 4 carriers on this route. WestJet offers the lowest fares. Based on Trip.com's flight booking data from the previous 12 months.
WestJet logo WestJet
Air Canada logo Air Canada
Alaska Airlines logo Alaska Airlines
American Airlines logo American Airlines
Airlines are determined based on actual purchased flight tickets from Seattle to Toronto according to previous 12 months data from Trip.com.

Flight Info | Seattle to Toronto

The distance between Seattle and Toronto is approximately 3,325.49 km. It takes around 4 hours 43 minutes on average to fly from Seattle to Toronto. Based on Trip.com's data travel demand peaks in July. The off-season for travel is October.

Cheapest one-way flight price $128
Cheapest round-trip ticket price $311
Off-season for travel October
Peak season for travel July
Flight distance 3,325.49 km
Average flight time 4 hours 43 minutes
Popular airline WestJet
Frequency ～7/week
Flight statistics for the Seattle–Toronto route are based on aggregated booking data from Trip.com over the past 12 months.

Trip.com price insights on flights from Seattle to Toronto

Which month has the cheapest one-way flights from Seattle to Toronto?

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

Based on Trip.com’s data, the cheapest month for flights from Seattle to Toronto is February, with an average price of $130; while the month with the highest flight price is usually July, with an average price of up to $311.

$311
$221
$130
$40
    Cheapest
  • $230
    Sep
  • $201
    Oct
  • $175
    Nov
  • $216
    Dec
  • $158
    Jan
  • $130
    Feb
  • $228
    Mar
  • $198
    Apr
  • $214
    May
  • $284
    Jun
  • $311
    Jul
  • $304
    Aug

When is the cheapest day to fly from Seattle to Toronto during Columbus Day?

Data is based on the lowest one-way price from Seattle to Toronto during Columbus Day on Trip.com in the past 3 days.

Columbus Day is scheduled for Oct 12. The cheapest flights from Seattle to Toronto are available on Oct 10, with fares starting at $147.

$257
$202
$147
$92
  • $173
    9
    Oct
  • $147
    10
  • $183
    11
  • $249
    12
  • $257
    13
  • $149
    14

Frequently Asked Questions

  • What are the cheapest flights from Seattle to Toronto (SEA-YTO)?

    Based on Trip.com data, WestJet offers one-way fares as low as $128 on Cheapest nonstop routes (e.g. SEA to YYZ on Tue, Sep 22), while WestJet offers Cheapest nonstop round-trips from $311 departing on Thu, Oct 8 and returning on Thu, Oct 15.
  • At the moment, you can catch a nonstop flight from Seattle to Toronto with the following airlines, including: Air Canada 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 around 4 hours 43 minutes to fly from Seattle (SEA) to Toronto (YTO).
  • By analyzing data from all airlines on the Trip.com flight calendar, it looks like the best time to book a flight from Seattle to Toronto 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.
  • Based on Trip.com data in the past 4 weeks, there is 14 flight per week flying from Seattle to Toronto. You can check the weekly schedule for popular airlines on this route below: Alaska Airlines: S/M/T/W/T/F/S -- AS385 (08:03) Air Canada: S/M/T/W/T/F/S -- AC540 (08:18)
  • To find best deals on flights from Seattle to Toronto, you can use various tools on Trip.com:
    · Be flexible with your travel dates to get the cheapest flight deal. Now the cheapest flight deal is on Tue, Sep 22, with one-way flights priced at just $128.
    · Compare airlines strategically. Budget carriers often provide the lowest base fares, while we found the most affordable airline currently operating on this route is Air Canada.
    · Set up price alerts to easily monitor ticket prices without having to check every day.
    · Check Trip.com flight deals and promo codes frequently.
    · Avoid peak season unless you book very early. It seems the peak season for Toronto travel is around July.
    · Get exclusive promo codes for Trip.com app users.
  • The cheapest months to fly from Seattle to Toronto is October, when demand for travel is lower.
  • After crunching the numbers on our September flight calendar, it's currently cheapest to fly from Seattle to Toronto on September 26, 2026 with WestJet, with prices starting at $126.
  • You can arrive at any of the following airports in Toronto: Toronto Pearson International Airport (YYZ), Billy Bishop Toronto City Airport (YTZ), John C. Munro Hamilton International Airport (YHM), and Region of Waterloo International Airport (YKF). Flights from Seattle-Tacoma International Airport to Toronto Pearson International Airport (SEA-YYZ) are by far the most popular option for this route.
  • The time difference between Toronto and Seattle is 3h.
  • Tickets can only be changed or canceled 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 Seattle to Toronto is $304. 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 Seattle to Toronto is $572. The final price depends on the outbound and return dates, airline and fare conditions.
  • Enter Seattle and Toronto, choose your travel dates and passengers, then compare flights by price, duration and baggage. Select a fare, review the change and cancellation rules, enter traveler details and complete payment to receive your confirmation.
  • WestJetare the most popular budget airlines flying from Seattle to Toronto. Check baggage, seat and payment fees before comparing the final price.

Explore More Popular Flights

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

Book with no extra fees

Prices displayed in this page are all-inclusive prices (incl. taxes, fuel surcharge, civil aviation development fund, etc) with all fees confirmed before payment. Fees for luggage, meals, WLAN, or other additional services are also included as shown in the flight cards.

Real-time pricing updates

Prices, availability, and travel information on this page were updated within last 24 hours—even in real-time. The more popular the route, the more precise the data.

Change & Cancellation Policy

Trip.com displays flight cancellation and change policies for each flight ticket during the booking process, including fees and applicable conditions. Please check the following scenarios:
Voluntary cancellation/change:
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.
Cancellation/change due to a flight schedule change:
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.