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Flights from St. Louis to Toronto

Book direct flights from St. Louis to Toronto: One way flights from $231, round trip flights from $449. Find flight deals for the next 3 months below.

      • Cheapest nonstop
        STL 7:05 AM
        1h 51m
        Nonstop
        YYZ 9:56 AM
        St. Louis - Toronto | Sun, May 17 | Air Canada
        YYZ 11:00 AM
        2h 6m
        Nonstop
        STL 12:06 PM
        Toronto - St. Louis | Tue, May 19 | Air Canada
        $449 $579
        22% off
        22% off
        $579 $449
      • STL 7:05 AM
        1h 51m
        Nonstop
        YYZ 9:56 AM
        St. Louis - Toronto | Mon, May 18 | Air Canada
        YYZ 7:00 PM
        2h 9m
        Nonstop
        STL 8:09 PM
        Toronto - St. Louis | Wed, May 20 | Air Canada
        $449 $579
        22% off
        22% off
        $579 $449
      • STL 5:51 AM
        7h 42m
        1 stop
        YYZ 2:33 PM
        St. Louis - Toronto | Mon, May 18 | American Airlines
        YYZ 6:55 PM
        2h 9m
        Nonstop
        STL 8:04 PM
        Toronto - St. Louis | Mon, May 25 | Air Canada
        $426 $579
        26% off
        26% off
        $579 $426
      • STL 9:23 AM
        7h 33m
        1 stop
        YYZ 5:56 PM
        St. Louis - Toronto | Sat, May 23 | United Airlines
        YYZ 6:55 PM
        2h 9m
        Nonstop
        STL 8:04 PM
        Toronto - St. Louis | Mon, May 25 | Air Canada
        $443
        23% off
        $579 $443
      • STL 7:45 AM
        7h 1m
        1 stop
        YYZ 3:46 PM
        St. Louis - Toronto | Thu, May 21 | United Airlines
        YYZ 11:00 AM
        2h 6m
        Nonstop
        STL 12:06 PM
        Toronto - St. Louis | Sun, May 24 | Air Canada
        $444
        23% off
        $579 $444
      • STL 5:36 PM
        4h 38m
        1 stop
        YYZ 11:14 PM
        St. Louis - Toronto | Sun, May 17 | Delta Air Lines
        YYZ 11:00 AM
        2h 6m
        Nonstop
        STL 12:06 PM
        Toronto - St. Louis | Tue, May 19 | Air Canada
        $453
        22% off
        $579 $453
      • STL 10:19 AM
        6h 2m
        1 stop
        YYZ 5:21 PM
        St. Louis - Toronto | Mon, May 18 | Delta Air Lines
        YYZ 7:00 PM
        2h 9m
        Nonstop
        STL 8:09 PM
        Toronto - St. Louis | Wed, May 20 | Air Canada
        $453
        22% off
        $579 $453
      • STL 10:15 AM
        6h 6m
        1 stop
        YYZ 5:21 PM
        St. Louis - Toronto | Thu, May 21 | Delta Air Lines
        YYZ 6:55 PM
        2h 9m
        Nonstop
        STL 8:04 PM
        Toronto - St. Louis | Sun, May 24 | Air Canada
        $457
        21% off
        $579 $457
      • STL 5:51 AM
        4h 2m
        1 stop
        YYZ 10:53 AM
        St. Louis - Toronto | Sun, May 17 | American Airlines
        YYZ 11:00 AM
        2h 6m
        Nonstop
        STL 12:06 PM
        Toronto - St. Louis | Tue, May 19 | Air Canada
        $472
        18% off
        $579 $472
      • STL 9:56 AM
        5h 49m
        1 stop
        YYZ 4:45 PM
        St. Louis - Toronto | Thu, May 21 | American Airlines
        YYZ 6:55 PM
        2h 9m
        Nonstop
        STL 8:04 PM
        Toronto - St. Louis | Sun, May 24 | Air Canada
        $474
        18% off
        $579 $474
      • STL 1:00 PM
        17h 25m
        1 stop
        YTO 2:00 PM
        St. Louis - Toronto | Mon, May 18 | Normal Airline
        YTO 3:00 PM
        6h
        Nonstop
        STL 4:00 PM
        Toronto - St. Louis | Wed, May 20 | Normal Airline
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      • Cheapest nonstop
        STL 8:55 AM
        1h 57m
        Nonstop
        YYZ 11:52 AM
        St. Louis - Toronto | Thu, Jul 9 | Air Canada
        $231 $291
        21% off
        21% off
        $291 $231
      • STL 8:55 AM
        1h 57m
        Nonstop
        YYZ 11:52 AM
        St. Louis - Toronto | Thu, Jul 2 | Air Canada
        $233 $291
        20% off
        20% off
        $291 $233
      • STL 2:15 PM
        1h 51m
        Nonstop
        YYZ 5:06 PM
        St. Louis - Toronto | Tue, Jun 23 | Air Canada
        $238 $291
        18% off
        18% off
        $291 $238
      • STL 2:15 PM
        1h 51m
        Nonstop
        YYZ 5:06 PM
        St. Louis - Toronto | Wed, Jun 24 | Air Canada
        $238
        18% off
        $291 $238
      • STL 2:15 PM
        1h 51m
        Nonstop
        YYZ 5:06 PM
        St. Louis - Toronto | Sun, Jun 21 | Air Canada
        $238
        18% off
        $291 $238
      • STL 6:00 AM
        7h 30m
        1 stop
        YYZ 2:30 PM
        St. Louis - Toronto | Wed, Jun 3 | American Airlines
        $152
        48% off
        $291 $152
      • STL 9:30 AM
        13h 11m
        1 stop
        YYZ 11:41 PM
        St. Louis - Toronto | Wed, Jun 3 | Delta Air Lines
        $233
        20% off
        $291 $233
      • STL 6:01 AM
        15h 22m
        1 stop
        YYZ 10:23 PM
        St. Louis - Toronto | Thu, Jul 9 | United Airlines
        $234
        20% off
        $291 $234
      • STL 1:22 PM
        9h 36m
        1 stop
        YYZ 11:58 PM
        St. Louis - Toronto | Thu, Jul 9 | Delta Air Lines
        $234
        20% off
        $291 $234
      • STL 5:10 AM
        9h 4m
        1 stop
        YYZ 3:14 PM
        St. Louis - Toronto | Thu, Jul 2 | United Airlines
        $237
        19% off
        $291 $237
      • STL 1:00 PM
        17h 25m
        1 stop
        YTO 2:00 PM
        St. Louis - Toronto | Mon, May 18 | Normal Airline
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Displayed flight fares from St. Louis to Toronto are based on average prices across airlines for the next 3 months, according to the latest Trip.com database.

Frequently Asked Questions

  • What are the cheapest flights from St. Louis to Toronto (STL-YTO)?

    Based on Trip.com data, American Airlines offers one-way fares as low as $152 on Cheapest nonstop routes (e.g. STL to YYZ on Wed, Jun 3), while American Airlines offers Cheapest nonstop round-trips from $426 departing on Mon, May 18 and returning on Mon, May 25.
  • At the moment, you can catch a nonstop flight from St. Louis to Toronto with the following airlines, including: Air Canada Selected airlines are based on historical data collected from flight bookings users made on Trip.com within the last 90 days.
  • It takes around 1 hour 53 minutes to fly from St. Louis (STL) 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 St. Louis 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 7 flight per week flying from St. Louis to Toronto. You can check the weekly schedule for popular airlines on this route below: Air Canada: S/M/T/W/T/F/S -- AC8888 (14:42) Air Canada: S/M/T/W/T/F/S -- AC1574 (07:03)
  • To find best deals on flights from St. Louis 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 Wed, Jun 3, with one-way flights priced at just $152.
    · 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 St. Louis to Toronto is September, when demand for travel is lower.
  • After crunching the numbers on our May flight calendar, it's currently cheapest to fly from St. Louis to Toronto on May 20, 2026 with Air Canada, with prices starting at $419.
  • You can land at any one of the following hubs in Toronto, with St. Louis Lambert International Airport to Toronto Pearson International Airport (STL-YYZ) is by far the most common option on this route: Toronto Pearson International Airport (YYZ) Billy Bishop Toronto City Airport (YTZ) John C. Munro Hamilton International Airport (YHM) Region of Waterloo International Airport (YKF).
  • The time difference between Toronto and St. Louis is 1h.
  • 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.

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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.