STL - YYZ

C$ 188 Find Cheap Flights from St. Louis to Toronto – Compare and Save

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Everything you should know

Cheapest round-trip
C$ 518
Typical prices: C$ 777-C$ 1,056
Multiple Airlines
Sun 2/12Fri 7/12
STL - YYZ • 1 stop
Cheapest direct flights
C$ 1,023
Typical prices: C$ 799-C$ 1,056
Air Canada
Wed 5/12Fri 7/12
STL - YYZ • Direct
Direct 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 travellers 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 C$ 603 (round-trip)
Shortest trip • 4h 04m (one-way)
Insights
Insights
Start a new search
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We hope you enjoy 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

Wed, 2 Dec - Mon, 7 Dec
Multiple Airlines Logo
6:13 p.m. - 1:40 p.m.STL  Lambert-St Louis-YYZ Toronto Pearson Intl
18h 27m1 stop Orlando
Multiple Airlines Logo
2:25 p.m. - 11:17 a.m.YYZ  Toronto Pearson Intl-STL Lambert-St Louis
45h 52m2 stops Tampa Atlanta Hartsfield-Jackson
C$ 518Multiple Airlines
Wed, 2 Dec - Mon, 7 Dec
Multiple Airlines Logo
12:05 p.m. - 1:40 p.m.STL  Lambert-St Louis-YYZ Toronto Pearson Intl
24h 35m2 stops Atlanta Hartsfield-Jackson Orlando
Multiple Airlines Logo
6:30 a.m. - 12:12 a.m.YYZ  Toronto Pearson Intl-STL Lambert-St Louis
18h 42m1 stop Orlando
C$ 522Multiple Airlines
Wed, 2 Dec - Sun, 6 Dec
Multiple Airlines Logo
12:05 p.m. - 1:40 p.m.STL  Lambert-St Louis-YYZ Toronto Pearson Intl
24h 35m2 stops Atlanta Hartsfield-Jackson Orlando
Multiple Airlines Logo
6:30 a.m. - 12:12 a.m.YYZ  Toronto Pearson Intl-STL Lambert-St Louis
18h 42m1 stop Orlando
C$ 533Multiple Airlines
Wed, 9 Dec - Wed, 16 Dec
Multiple Airlines Logo
12:02 p.m. - 5:10 p.m.STL  Lambert-St Louis-YYZ Toronto Pearson Intl
28h 08m2 stops Atlanta Hartsfield-Jackson Fort Lauderdale
Multiple Airlines Logo
11:30 a.m. - 4:50 p.m.YYZ  Toronto Pearson Intl-STL Lambert-St Louis
30h 20m1 stop Las Vegas Harry Reid Intl
C$ 542Multiple Airlines
Tue, 8 Dec - Tue, 15 Dec
American Airlines Logo
6:02 a.m. - 2:42 p.m.STL  Lambert-St Louis-YYZ Toronto Pearson Intl
7h 40m1 stop Chicago O'Hare Intl
American Airlines Logo
1:22 p.m. - 10:17 p.m.YYZ  Toronto Pearson Intl-STL Lambert-St Louis
9h 55m1 stop Chicago O'Hare Intl
C$ 546American Airlines
Thu, 26 Nov - Wed, 9 Dec
American Airlines Logo
5:00 a.m. - 5:40 p.m.STL  Lambert-St Louis-YYZ Toronto Pearson Intl
11h 40m1 stop Chicago O'Hare Intl
American Airlines Logo
11:36 a.m. - 7:58 p.m.YYZ  Toronto Pearson Intl-STL Lambert-St Louis
9h 22m1 stop Chicago O'Hare Intl
C$ 546American Airlines
Mon, 16 Nov - Wed, 18 Nov
American Airlines Logo
7:26 a.m. - 5:41 p.m.STL  Lambert-St Louis-YYZ Toronto Pearson Intl
9h 15m1 stop Chicago O'Hare Intl
American Airlines Logo
3:15 p.m. - 10:15 p.m.YYZ  Toronto Pearson Intl-STL Lambert-St Louis
8h 00m1 stop Chicago O'Hare Intl
C$ 546American Airlines
Fri, 5 Feb - Mon, 8 Feb
American Airlines Logo
7:21 a.m. - 5:44 p.m.STL  Lambert-St Louis-YYZ Toronto Pearson Intl
9h 23m1 stop Chicago O'Hare Intl
American Airlines Logo
3:20 p.m. - 10:34 p.m.YYZ  Toronto Pearson Intl-STL Lambert-St Louis
8h 14m1 stop Chicago O'Hare Intl
C$ 546American Airlines
Sat, 5 Dec - Mon, 7 Dec
Air Canada Logo
4:05 p.m. - 7:05 p.m.STL  Lambert-St Louis-YYZ Toronto Pearson Intl
2h 00mdirect
Air Canada Logo
2:10 p.m. - 3:26 p.m.YYZ  Toronto Pearson Intl-STL Lambert-St Louis
2h 16mdirect
C$ 1,023Air Canada
Thu, 12 Nov - Fri, 13 Nov
Air Canada Logo
4:05 p.m. - 7:05 p.m.STL  Lambert-St Louis-YYZ Toronto Pearson Intl
2h 00mdirect
Air Canada Logo
2:10 p.m. - 3:26 p.m.YYZ  Toronto Pearson Intl-STL Lambert-St Louis
2h 16mdirect
C$ 1,177Air 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 is 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 C$ 690 round-trip.
•February (C$ 1,040) and January (C$ 996) 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 United Airlines and Air Canada

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.

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

Low season

February

Cheapest flight

C$ 188
Beat the crowds with an average 55% drop in traveller numbers.
The most popular month to fly with an average 43% increase in traveller numbers.
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.

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

    Only Economy Class is available on flights from St. Louis to Toronto Pearson Intl Airport.

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

    A direct flight from St. Louis to Toronto Pearson Intl Airport takes 2h, covering 1,692 km.

  • 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 C$ 777 to C$ 1,056, with an average of C$ 907 over the past 12 months. Anything below C$ 777 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 C$ 907 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 direct options on average. Layover fares average C$ 603 round-trip via Orlando (MCO), compared to C$ 918 for direct.

  • 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 C$ 56–C$ 101 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% 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 C$ 518 to C$ 2,306. That means the highest observed fare was about 4x 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 C$ 306, which is 27% below the typical average for this route.

  • 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 C$ 818 round-trip on average, while Monday is the most expensive at C$ 1,174, a difference of C$ 356.

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

  • Which 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 when travelling 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.

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

    Some of the most popular sights in Toronto Pearson Intl Airport are Rogers Centre, Scotiabank Arena, and Union Station. 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 carry-on bag and a checked bag in Economy Class
    • United Airlines: a carry-on bag and a checked bag in First Class

    Baggage 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 C$ 818, about C$ 356 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 C$ 690 round-trip in that month – typically C$ 349 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 C$ 603 round-trip on this route – about C$ 315 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 nonstop 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 nonstop flights

More options for your flight from St. Louis to Toronto

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