STL - YYZ

$165 Find Cheap Flights from St. Louis to Toronto - Compare and Save

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Everything you should know

Cheapest round-trip
$356
Typical prices: $554-$753
Multiple Airlines
Tue 12/11Thu 12/13
STL - YYZ • 2 stops
Cheapest non-stop
$552
Typical prices: $569-$753
Air Canada
Sun 11/4Wed 11/7
STL - YYZ • Non-stop
Nonstop flights
You can fly direct with Air Canada. Average duration is 2h
Direct flights
+1
Direct flights
+1
When to book
in advance
Our data shows that travelers who book at least 14 weeks in advance save around 49% compared to booking last minute.
Insights
Insights
When to travel
Cheapest • 24% price drop
Most popular
Good to know
+1
Good to know
+1
Top layover airports
Cheapest • Avg $430 (round-trip)
Shortest trip • 4h 04m (one-way)
Insights
Insights
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We hope you love your trip to Toronto Pearson Intl Airport!
Flight Deals
Booking Insights
Expert advice
Flight Deals

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

 
Discover the best prices for you by selecting your travel dates on KAYAK.

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

Fri, Dec 11 - Sun, Dec 13
Multiple Airlines Logo
12:02 pm - 1:40 pmSTL  Lambert-St Louis-YYZ Toronto Pearson Intl
24h 38m2 stops Atlanta Hartsfield-Jackson Orlando
Multiple Airlines Logo
6:20 pm - 11:17 amYYZ  Toronto Pearson Intl-STL Lambert-St Louis
17h 57m2 stops Washington, D.C. Reagan-National Atlanta Hartsfield-Jackson
$356Multiple Airlines
Fri, Dec 11 - Sun, Dec 13
Multiple Airlines Logo
12:02 pm - 11:45 amSTL  Lambert-St Louis-YYZ Toronto Pearson Intl
22h 43m3 stops Atlanta Hartsfield-Jackson Baltimore/Washington Montreal Pierre Elliott Trudeau Intl
Multiple Airlines Logo
9:00 pm - 11:17 amYYZ  Toronto Pearson Intl-STL Lambert-St Louis
15h 17m2 stops Washington, D.C. Reagan-National Atlanta Hartsfield-Jackson
$368Multiple Airlines
Fri, Feb 5 - Mon, Feb 8
American Airlines Logo
7:21 am - 5:44 pmSTL  Lambert-St Louis-YYZ Toronto Pearson Intl
9h 23m1 stop Chicago O'Hare Intl
American Airlines Logo
3:20 pm - 10:34 pmYYZ  Toronto Pearson Intl-STL Lambert-St Louis
8h 14m1 stop Chicago O'Hare Intl
$389American Airlines
Tue, Dec 8 - Tue, Dec 15
American Airlines Logo
6:02 am - 2:42 pmSTL  Lambert-St Louis-YYZ Toronto Pearson Intl
7h 40m1 stop Chicago O'Hare Intl
American Airlines Logo
1:22 pm - 10:17 pmYYZ  Toronto Pearson Intl-STL Lambert-St Louis
9h 55m1 stop Chicago O'Hare Intl
$389American Airlines
Tue, Dec 8 - Tue, Dec 15
Delta Logo
1:00 pm - 11:41 pmSTL  Lambert-St Louis-YYZ Toronto Pearson Intl
9h 41m1 stop New York LaGuardia
Delta Logo
10:00 am - 8:32 pmYYZ  Toronto Pearson Intl-STL Lambert-St Louis
11h 32m2 stops New York LaGuardia Detroit Metropolitan Wayne County
$474Delta
Fri, Feb 5 - Mon, Feb 8
Delta Logo
6:45 am - 5:51 pmSTL  Lambert-St Louis-YYZ Toronto Pearson Intl
10h 06m2 stops Detroit Metropolitan Wayne County New York LaGuardia
Delta Logo
6:15 am - 3:55 pmYYZ  Toronto Pearson Intl-STL Lambert-St Louis
10h 40m1 stop New York LaGuardia
$511Delta
Wed, Nov 4 - Sat, Nov 7
Air Canada Logo
4:05 pm - 7:05 pmSTL  Lambert-St Louis-YYZ Toronto Pearson Intl
2h 00mnonstop
Air Canada Logo
2:10 pm - 3:26 pmYYZ  Toronto Pearson Intl-STL Lambert-St Louis
2h 16mnonstop
$552Air Canada
Fri, Dec 11 - Sun, Dec 13
United Airlines Logo
6:30 am - 4:47 pmSTL  Lambert-St Louis-YYZ Toronto Pearson Intl
9h 17m1 stop Chicago O'Hare Intl
United Airlines Logo
7:26 pm - 12:22 pmYYZ  Toronto Pearson Intl-STL Lambert-St Louis
17h 56m1 stop Chicago O'Hare Intl
$658United Airlines
Wed, Mar 24 - Sat, Mar 27
United Airlines Logo
1:00 pm - 11:22 amSTL  Lambert-St Louis-YYZ Toronto Pearson Intl
21h 22m1 stop Washington, D.C. Dulles Intl
United Airlines Logo
10:19 am - 6:38 pmYYZ  Toronto Pearson Intl-STL Lambert-St Louis
9h 19m1 stop Washington, D.C. Dulles Intl
$735United Airlines
Fri, Dec 11 - Sun, Dec 13
Air Canada Logo
4:05 pm - 7:05 pmSTL  Lambert-St Louis-YYZ Toronto Pearson Intl
2h 00mnonstop
Air Canada Logo
2:10 pm - 3:26 pmYYZ  Toronto Pearson Intl-STL Lambert-St Louis
2h 16mnonstop
$784Air Canada
Booking Insights

Price, demand and travel trends for St. Louis to Toronto Pearson Intl Airport flights

Use KAYAK data on prices, travel dates, airlines and seasonal trends to compare options and book flights with more confidence.

What's the cheapest day of the week to fly from St. Louis to Toronto Pearson Intl Airport?

Based on deals KAYAK users found in the last 12 months, Sunday is the cheapest day of the week to fly from St. Louis to Toronto Pearson Intl Airport. It’s 10% cheaper than the average day, while Monday is the most expensive, with prices 29% higher.

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

•December is the cheapest month to fly from St. Louis to Toronto Pearson Intl Airport at $492 round-trip.
•February ($741) and January ($710) are the most expensive months.
•The price difference between flying in the cheapest and most expensive months is 50% on average.
This is based on KAYAK aggregated and averaged internal data over the past 12 months.

When are flights from St. Louis to Toronto Pearson Intl Airport the cheapest?

Flights from St. Louis to Toronto Pearson Intl Airport are cheapest 14 weeks before departure. Booking in this window typically costs about 49% less than the average last-minute fare (within 2 weeks of the flight), based on KAYAK data.

Expert advice

Expert advice for your flight from St. Louis to Toronto

 
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.

Key details for St. Louis to Toronto Pearson Intl Airport flights

Low season

February

Cheapest flight

$145
Beat the crowds with an average 55% drop in travelers.
The most popular month to fly with an average 43% increase in travelers.
One-way flight from St. Louis to Toronto Pearson Intl Airport

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

Your St. Louis to Toronto Pearson Intl Airport flight questions, answered

Find helpful answers about this route, including flight times, airports, airlines and booking tips.

  • What are the earliest and latest flights from St. Louis to Toronto Pearson Intl Airport?

    These are the earliest and latest flight times available from St. Louis to Toronto Pearson Intl Airport:

    • Earliest: departs at 4:05 pm and lands at 6:05 pm
    • Latest: departs at 4:05 pm and lands at 6:05 pm.

    The flight takes about 2h.

  • What cabin classes can I book on flights from St. Louis to Toronto Pearson Intl Airport?

    Two cabin classes are available on flights from St. Louis to Toronto Pearson Intl Airport:

    • Economy Class
    • First Class

  • How long is a flight from St. Louis to Toronto Pearson Intl Airport?

    A nonstop flight from St. Louis to Toronto Pearson Intl Airport takes 2h, covering 653 miles.

  • Do I need a passport to fly from St. Louis to Toronto Pearson Intl Airport?

    Yes, a valid passport is required for this international route. Many destinations require at least six months of validity beyond your travel dates. Check your passport expiry well before booking.

  • How much should I expect to pay for a St. Louis to Toronto Pearson Intl Airport flight?

    Round-trip flights from St. Louis to Toronto Pearson Intl Airport range from $554 to $753, with an average of $646 over the past 12 months. Anything below $554 counts as a good deal.

  • How expensive are last-minute St. Louis to Toronto Pearson Intl Airport flights?

    Last-minute fares on this route (booked within two weeks of departure) run 69% above the $646 route average. Book 14 weeks before departure for the lowest fares.

  • How much can I save by taking a layover when flying from St. Louis to Toronto Pearson Intl Airport?

    On this route, layover flights are cheaper than nonstop options on average. Layover fares average $430 round-trip via Orlando (MCO), compared to $654 for nonstop.

  • What is the standard checked-bag allowance on flights from St. Louis to Toronto Pearson Intl Airport?

    There is no standard. Checked-bag policies vary by airline on this route. Most carriers charge $40–$72 for the first checked bag in economy. Premium fares and elite-status bookings typically include a free checked bag.

  • Which aircraft model is used most often on flights from St. Louis to Toronto Pearson Intl Airport?

    The Canadair (Bombardier) Regional Jet 900 family is used most often on this route, operated mainly by United Airlines and Air Canada. Other aircraft seen on the route include Embraer 175 variants.

  • How are flight departures from St. Louis to Toronto Pearson Intl Airport spread across the day?

    Afternoon is the busiest departure period on St. Louis to Toronto Pearson Intl Airport flights, with 100% of flights leaving in that window. Morning departures account for 0%, evening flights for 0%, and night flights for 0%.

  • Have flight prices from St. Louis to Toronto Pearson Intl Airport changed much recently?

    Yes. Based on fares seen in the past 5 days, round-trip prices on this route showed a wide range, from about $356 to $2,141. That means the highest observed fare was about 6x higher than the lowest one.

  • Which airlines offer Wi-Fi on St. Louis to Toronto Pearson Intl Airport flights?

    Air Canada is the only airline on the St. Louis to Toronto Pearson Intl Airport route offering in-flight Wi-Fi. Pricing depends on fare class.

  • How are flight prices from St. Louis to Toronto Pearson Intl Airport looking right now?

    One-way fares from St. Louis to Toronto Pearson Intl Airport are currently lower than usual. Average one-way flight prices are about $259, which is 13% below the typical average for this route.

  • What car rental options are available at Toronto Pearson Intl Airport (YYZ)?

    Toronto Pearson Intl Airport (YYZ) hosts 5 major car rental companies, with daily rates starting from around $5 for economy cars. Top options include:

    • Ace
    • City Car & Truck Rental
    • Routes Car & Truck Rentals
    • Zoom Rent A Car
    • Hertz

  • Which airports can I use when flying from St. Louis to Toronto Pearson Intl Airport?

    Flights from St. Louis to Toronto Pearson Intl Airport usually depart from Lambert-St Louis (STL) and arrive at Toronto Pearson Intl (YYZ).

  • Which airports do connecting flights from St. Louis to Toronto Pearson Intl Airport pass through?

    One-stop flights from St. Louis to Toronto Pearson Intl Airport most commonly connect through:

    • Chicago O'Hare Intl (ORD) - 56% of one-stop connections
    • Detroit Metropolitan Wayne County (DTW) - 28% of one-stop connections
    • Washington, D.C. Reagan-National (DCA) - 8% of one-stop connections
    • Charlotte Douglas (CLT) - 3% of one-stop connections

  • Can I save money by using flexible dates for flights from St. Louis to Toronto Pearson Intl Airport?

    Yes. Flexible dates can save you up to 31% on flights from St. Louis to Toronto Pearson Intl Airport. Sunday is the cheapest departure day at $583 round-trip on average, while Monday is the most expensive at $837, a difference of $254.

    Cheaper weekend fares like these are typical of routes dominated by weekday business travel.

  • What airlines fly from St. Louis to Toronto Pearson Intl Airport?

    Only Air Canada operates flights between St. Louis and Toronto Pearson Intl Airport.

  • How much time can I save by choosing a different layover airport from St. Louis to Toronto Pearson Intl Airport?

    Flying via Detroit Metropolitan Wayne County (DTW) gives the shortest average 1-stop total travel time at 4h 04m, compared with 5h 01m via Atlanta Hartsfield-Jackson (ATL) and 5h 17m via Washington, D.C. Reagan-National (DCA).

  • What is the time difference between St. Louis and Toronto Pearson Intl Airport?

    Toronto Pearson Intl Airport is 1 hour ahead of St. Louis (Eastern Time vs Central Time). Plan for the time shift when scheduling connections or first-day activities.

  • What popular places can I visit in Toronto Pearson Intl Airport?

    Some of the most popular sights in Toronto Pearson Intl Airport are Rogers Centre, Union Station and Scotiabank Arena. These are among the most viewed places in Toronto Pearson Intl Airport on KAYAK.

  • Which airlines offer extra legroom and free seat selection on St. Louis to Toronto Pearson Intl Airport flights?

    Among airlines operating St. Louis to Toronto Pearson Intl Airport flights:

    • Air Canada: offers free seat selection
    • United Airlines: offers free seat selection

    Extra legroom and free seat selection availability depends on fare class and route.

  • Which airlines include bags at no extra cost on St. Louis to Toronto Pearson Intl Airport flights?

    Here are some options for this route, based on selected ticket types and cabin classes:

    • Air Canada: a cabin bag and a checked bag in Economy Class
    • United Airlines: a cabin bag and a checked bag in First Class

    Bag allowance can vary by ticket type, cabin class, route and airline, so always check the fare details before booking.

Your guide to booking St. Louis to Toronto Pearson Intl Airport flights

Get tips on when to book, when to fly and what to know before your trip.
  • If your dates are flexible, aim for a Sunday departure and avoid flying on Monday. On this route, Sunday flights average $583, about $254 less than Monday fares (30% savings) based on the last 12 months.
  • For the best chance at a low fare, aim to book around 14 weeks before you fly. On this route, that window historically saves about 49% versus last-minute pricing (KAYAK booking data, last 12 months).
  • If you can choose when to travel, plan your St. Louis to Toronto Pearson Intl Airport trip for December. Fares historically average $492 round-trip in that month - typically $249 less than the most expensive month, which is February (based on the last 12 months).
  • If you have the time, taking a 1-stop flight through Orlando Airport (MCO) can be cheaper than flying direct. The cheapest layover option averages $430 round-trip on this route - about $225 less than direct flights (based on the last 12 months).
  • If you're arriving late at night and need somewhere to stay, check out these hotels close to Toronto Pearson Intl Airport.

    • Crowne Plaza Toronto Airport By IHG
    • Sheraton Gateway Hotel in Toronto International Airport
    • Spark by Hilton Toronto Airport

Prefer to fly direct from St. Louis to Toronto?

 
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

More options for your flight from St. Louis to Toronto

Complete your trip to Toronto with a hotel stay or car rental