STL - YYZ

$158 Find Cheap Flights from St. Louis to Toronto - Compare and Save

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from St. Louis to Toronto departing on 10/14. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

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Everything you should know

Cheapest round-trip
$365
Typical prices: $554-$676
American Airlines
Thu 9/17Mon 9/21
STL - YYZ • 1 stop
Cheapest non-stop
$573
Typical prices: $554-$741
Air Canada
Thu 9/10Thu 9/17
STL - YYZ • Non-stop
Advice from real travelers
AI-powered summary based on content written by travel experts. AI can make mistakes.
United Economy Plus adds up to 6 inches of legroom over standard economy.
United Priority Boarding helps avoid carry-on gate checks; Air Canada adds legroom.
Expert advice
Expert advice
Expert advice
Expert advice
Nonstop flights
You can fly direct with Air Canada. Average duration is 2h 00m
Direct flights
Direct flights
+1
+1
Direct flights
Direct flights
+1
Top layover airports
Cheapest • Avg $560 (round-trip)
Shortest trip • 4h 02m (one-way)
Insights
Insights
Insights
Insights
When to travel
Cheapest • 24% price drop
Most popular
Good to know
Good to know
+1
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Good to know
Good to know
+1
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KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Toronto!
Flight Deals
Booking Insights
Expert advice
Flight Deals

Cheap Flights from St. Louis to Toronto (STL-YYZ)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from St. Louis to Toronto that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from St. Louis to Toronto

Thu, Sep 17 - Mon, Sep 21
American Airlines Logo
5:00 am - 2:32 pm
STL
-
YYZ
8h 32m
1 stop
American Airlines Logo
1:15 pm - 12:27 am
YYZ
-
STL
12h 12m
1 stop
$365American Airlines
Sat, Sep 12 - Tue, Sep 15
American Airlines Logo
11:01 am - 11:26 pm
STL
-
YYZ
11h 25m
1 stop
American Airlines Logo
6:30 am - 4:48 pm
YYZ
-
STL
11h 18m
1 stop
$365American Airlines
Mon, Sep 21 - Tue, Sep 22
American Airlines Logo
7:21 am - 6:35 pm
STL
-
YYZ
10h 14m
1 stop
American Airlines Logo
11:40 am - 8:44 pm
YYZ
-
STL
10h 04m
1 stop
$365American Airlines
Wed, Oct 28 - Mon, Nov 2
Multiple Airlines Logo
10:35 am - 12:10 am
STL
-
YYZ
12h 35m
2 stops
Multiple Airlines Logo
6:30 am - 7:39 pm
YYZ
-
STL
14h 09m
1 stop
$367Multiple Airlines
Mon, Oct 26 - Wed, Oct 28
Multiple Airlines Logo
10:35 am - 12:10 am
STL
-
YYZ
12h 35m
2 stops
Multiple Airlines Logo
5:15 pm - 7:39 pm
YYZ
-
STL
27h 24m
1 stop
$372Multiple Airlines
Thu, Oct 8 - Mon, Oct 12
Multiple Airlines Logo
10:35 am - 8:55 pm
STL
-
YYZ
33h 20m
2 stops
Multiple Airlines Logo
7:45 am - 7:39 pm
YYZ
-
STL
12h 54m
1 stop
$388Multiple Airlines
Tue, Sep 15 - Sat, Sep 19
United Airlines Logo
8:00 am - 5:01 pm
STL
-
YYZ
8h 01m
1 stop
United Airlines Logo
8:50 am - 3:38 pm
YYZ
-
STL
7h 48m
1 stop
$533United Airlines
Mon, Aug 31 - Tue, Sep 1
United Airlines Logo
6:54 pm - 12:35 pm
STL
-
YYZ
16h 41m
1 stop
United Airlines Logo
6:55 pm - 8:39 am
YYZ
-
STL
14h 44m
1 stop
$553United Airlines
Thu, Sep 10 - Thu, Sep 17
Air Canada Logo
8:55 am - 11:49 am
STL
-
YYZ
1h 54mnonstop
Air Canada Logo
12:55 pm - 2:00 pm
YYZ
-
STL
2h 05mnonstop
$573Air Canada
Tue, Sep 8 - Tue, Sep 15
Air Canada Logo
2:40 pm - 5:34 pm
STL
-
YYZ
1h 54mnonstop
Air Canada Logo
12:55 pm - 2:00 pm
YYZ
-
STL
2h 05mnonstop
$583Air Canada
Booking Insights

KAYAK's insights & trends for St. Louis to Toronto flights

Get data-powered insights and trends into flights from St. Louis to Toronto to help you find the cheapest flights, the best time to fly and much more.

How much is a round-trip flight from St. Louis to Toronto Pearson Intl Airport?

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from St. Louis to Toronto Pearson Intl Airport departing in September.

Flight prices are below average for this route right now.

Flights to Toronto Pearson Intl Airport from St. Louis usually cost between $507 and $752 in September.
The lowest price found in the past 5 days was $365 on American Airlines (Sep 17-Sep 21).

What’s the cheapest day of the week to fly from St. Louis to Toronto?

The average price of all round-trip flights from St. Louis to Toronto Pearson Intl Airport clicked on KAYAK for each day over the last 12 months.

For St. Louis to Toronto, Friday is the cheapest day to fly on average and Saturday is the most expensive. Flying from Toronto back to St. Louis, the best deals are generally found on Sunday, with Monday being the most expensive.

What is the cheapest month to fly from St. Louis to Toronto Pearson Intl Airport?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from St. Louis to Toronto Pearson Intl Airport, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from St. Louis to Toronto Pearson Intl Airport is December, where tickets cost $466 (return) on average. On the other hand, the most expensive months are January and April, where the average cost of round-trip tickets is $916 and $782 respectively.

Can I save money by flying with a layover from St. Louis to Toronto Pearson Intl Airport?

The average round-trip price for all non-stop flights, flights with one layover, and flights with two layovers for the route found by users searching on KAYAK in the last 2 weeks.

Yes, flying with a layover may cost you more time, but you can also save money on the route, with a 1 stop layover the cheapest option at $492 on average.

Expert advice

Expert advice for your flight from St. Louis to Toronto

 
AI-powered summary based on content written by travel experts. AI can make mistakes.
KAYAK teamed up with top travel experts to share the best tips for your journey.
Our travel experts
Stefanie Waldek

Stefanie Waldek

Expert on Air Canada, United Airlines and YYZ

Stefanie Waldek is a freelance space, travel, and design writer based in Saratoga Springs, NY. Her words have appeared in Space.com, Travel + Leisure, Condé Nast Traveler, Architectural Digest, and House Beautiful, among other publications. An expert in aviation and expedition cruising, Stefanie is frequently up in the air or on the sea, likely en route to Antarctica or the Arctic.

Yulia Denisyuk

Yulia Denisyuk

Expert on STL

Yulia is a freelance journalist who’s dispatched from 90+ countries. Her work focuses on cultures, adventure trips and air travel, appearing in NatGeo, NYT, CNTraveler, and more. For past assignments, she’s stayed with nomads in Mongolia and learned the art of Imigongo in Rwanda. She’s based in Chicago; in winter she often questions that decision.

Good to know

Low season

April

Cheapest flight

$158
Best time to beat the crowds but there is an average 27% increase in price.
Most popular time to fly with an average 2% increase in price.
Flight from St. Louis to Toronto

When to book flights from St. Louis to Toronto

Are your dates flexible? Find out the best times to travel from St. Louis to Toronto based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking St. Louis to Toronto flights

  • What is the cheapest flight from St. Louis to Toronto Pearson Intl Airport?

    In the last 5 days, the lowest price for a flight from St. Louis to Toronto Pearson Intl Airport was $161 for a one-way ticket and $355 for a round-trip.

  • Do I need a passport to fly between St. Louis and Toronto?

    Yes

  • Which airlines offer Wi-Fi service onboard planes from St. Louis to Toronto?

    Air Canada, Spirit Airlines, United Airlines, Lufthansa, and American Airlines offer inflight Wi-Fi service on the St. Louis to Toronto flight route.

  • Which aircraft models fly most regularly from St. Louis to Toronto?

    The Canadair (Bombardier) Regional Jet 900 is the aircraft model that flies most regularly on the St. Louis to Toronto flight route.

  • Which airline alliances offer flights from St. Louis to Toronto?

    oneworld, and Star Alliance are the airline alliances operating flights between St. Louis and Toronto, with oneworld being the most commonly used for this route.

  • On which days can I fly direct from St. Louis to Toronto?

    There are nonstop flights from St. Louis to Toronto on a daily basis.

  • Which is the best airline for flights from St. Louis to Toronto, United Airlines or Air Canada?

    The two airlines most popular with KAYAK users for flights from St. Louis to Toronto are United Airlines and Air Canada. With an average price for the route of $632 and an overall rating of 7.4, United Airlines is the most popular choice. Air Canada is also a great choice for the route, with an average price of $643 and an overall rating of 7.1.

  • How does KAYAK find such low prices on flights from St. Louis to Toronto?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from St. Louis to Toronto.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from St. Louis to Toronto?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Toronto from St. Louis is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from St. Louis to Toronto?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Toronto with an airline and back to St. Louis with another airline. Booking your flights between St. Louis and YYZ can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from St. Louis to Toronto?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Toronto from St. Louis up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

KAYAK’s top tips for finding a cheap flight from St. Louis to Toronto Pearson Intl Airport

  • Looking for a cheap flight? 25% of our users found flights on this route for $275 or less one-way and $405 or less round-trip.

Prefer to fly direct from St. Louis to Toronto?

 
Direct data is based off flight results for the next 60 days. Find direct flights from all airlines flying direct from Lambert-St Louis to Toronto Pearson Intl.
Find which airlines fly direct from Lambert-St Louis Airport to Toronto Pearson Intl Airport, which days they fly and book direct flights.

Direct departures

Lambert-St Louis to Toronto Pearson Intl

Monday

Air Canada

Air Canada

Tuesday

Air Canada

Air Canada

Wednesday

Air Canada

Air Canada

Thursday

Air Canada

Air Canada

Friday

Air Canada

Air Canada

Saturday

Air Canada

Air Canada

Sunday

Air Canada

Air Canada

See more direct flights

Direct returns

Toronto Pearson Intl to Lambert-St Louis

Monday

Air Canada

Air Canada

Tuesday

Air Canada

Air Canada

Wednesday

Air Canada

Air Canada

Thursday

Air Canada

Air Canada

Friday

Air Canada

Air Canada

Saturday

Air Canada

Air Canada

Sunday

Air Canada

Air Canada

See more direct flights

Everything you need to know for your flight from St. Louis to Toronto

Information on your arrival and departure airports