$158+ Cheap flights from St. Louis (STL) to Toronto (YTO)
This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/14. Fares are subject to change and may not be available on all flights or dates of travel.
STL — YTO
Aug 27 — Sep 31
Round-trip
1 adult, Economy
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Find cheap flights from St. Louis to Toronto with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheapflights Tip: The best prices from Lambert-St Louis to Toronto are usually found in December or January, booked 53 days in advance, depart on a Friday or Tuesday and return on a Sunday
Cheap flight deals from St. Louis to Toronto
Cheapest
Best
Last-minute
One-way
Cheapest flights from St. Louis to TorontoExplore the most affordable flight options available from St. Louis to Toronto. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 28, 2026.
Explore the most affordable flight options available from St. Louis to Toronto. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 28, 2026.
This American Airlines deal was found by Cheapflights users on 7/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/175:00 am
STL
- YYZ
1 stop8h 32m
American Airlines
Mon 9/211:15 pm
YYZ
- STL
1 stop12h 12m
American Airlines
Deal found 7/27![American Airlines logo]()
$365
This Kiwi.com deal was found by Cheapflights users on 7/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/2810:35 am
STL
- YYZ
2 stops12h 35m
Multiple Airlines
Mon 11/26:30 am
YYZ
- STL
1 stop14h 09m
Multiple Airlines
Deal found 7/26![Multiple Airlines logo]()
$367
This American Airlines deal was found by Cheapflights users on 7/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/55:00 am
STL
- YYZ
1 stop8h 33m
American Airlines
Sun 9/63:14 pm
YYZ
- STL
1 stop9h 44m
American Airlines
Deal found 7/26![American Airlines logo]()
$370
This American Airlines deal was found by Cheapflights users on 7/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/89:32 am
STL
- YYZ
1 stop7h 58m
American Airlines
Tue 9/156:30 am
YYZ
- STL
1 stop7h 46m
American Airlines
Deal found 7/25![American Airlines logo]()
$371
This American Airlines deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/195:00 am
STL
- YYZ
1 stop8h 32m
American Airlines
Thu 9/246:30 am
YYZ
- STL
1 stop7h 46m
American Airlines
Deal found 7/24![American Airlines logo]()
$372
This Kiwi.com deal was found by Cheapflights users on 7/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/810:35 am
STL
- YYZ
2 stops33h 20m
Multiple Airlines
Mon 10/127:45 am
YYZ
- STL
1 stop12h 54m
Multiple Airlines
Deal found 7/25![Multiple Airlines logo]()
$388
This Kiwi.com deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/1910:35 am
STL
- YYZ
2 stops29h 20m
Multiple Airlines
Sat 10/316:30 am
YYZ
- STL
1 stop14h 09m
Multiple Airlines
Deal found 7/24![Multiple Airlines logo]()
$389
This Kiwi.com deal was found by Cheapflights users on 7/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/268:34 pm
STL
- YYZ
1 stop16h 31m
Multiple Airlines
Wed 10/285:15 pm
YYZ
- STL
1 stop27h 24m
Multiple Airlines
Deal found 7/27![Multiple Airlines logo]()
$397
This Kiwi.com deal was found by Cheapflights users on 7/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/106:39 pm
STL
- YYZ
1 stop21h 06m
Multiple Airlines
Thu 9/176:30 am
YYZ
- STL
2 stops31h 40m
Multiple Airlines
Deal found 7/27![Multiple Airlines logo]()
$398
This Kiwi.com deal was found by Cheapflights users on 7/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/910:35 am
STL
- YYZ
2 stops12h 00m
Multiple Airlines
Mon 10/127:45 am
YYZ
- STL
1 stop12h 54m
Multiple Airlines
Deal found 7/25![Multiple Airlines logo]()
$415
This Kiwi.com deal was found by Cheapflights users on 7/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/610:35 am
STL
- YYZ
2 stops27h 45m
Multiple Airlines
Mon 11/99:35 am
YYZ
- STL
1 stop11h 04m
Multiple Airlines
Deal found 7/27![Multiple Airlines logo]()
$416
Best flights from St. Louis to TorontoDiscover carefully curated flight deals from St. Louis to Toronto that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated July 28, 2026.
Discover carefully curated flight deals from St. Louis to Toronto that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated July 28, 2026.
This United Airlines deal was found by Cheapflights users on 7/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/158:00 am
STL
- YYZ
1 stop8h 01m
United Airlines
Sat 9/198:50 am
YYZ
- STL
1 stop7h 48m
United Airlines
Deal found 7/23![United Airlines logo]()
$533
This oojo deal was found by Cheapflights users on 7/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/309:47 am
STL
- YYZ
2 stops12h 56m
WestJet
Mon 11/25:00 pm
YYZ
- STL
2 stops17h 17m
WestJet
Deal found 7/28![WestJet logo]()
$619
This United deal was found by Cheapflights users on 7/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/178:00 am
STL
- YYZ
1 stop14h 26m
Multiple Airlines
Mon 9/2112:55 pm
YYZ
- STL
Nonstop2h 05m
Multiple Airlines
Deal found 7/27![Multiple Airlines logo]()
$660
This United Airlines deal was found by Cheapflights users on 7/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/316:54 pm
STL
- YYZ
1 stop16h 41m
United Airlines
Tue 9/16:55 pm
YYZ
- STL
1 stop14h 44m
United Airlines
Deal found 7/27![United Airlines logo]()
$553
This oojo deal was found by Cheapflights users on 7/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/1911:00 am
STL
- YYZ
1 stop5h 19m
WestJet
Mon 8/2410:25 pm
YYZ
- STL
2 stops19h 19m
WestJet
Deal found 7/28![WestJet logo]()
$655
This United deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/215:30 pm
STL
- YYZ
1 stop21h 16m
Multiple Airlines
Wed 9/307:15 pm
YYZ
- STL
Nonstop2h 05m
Multiple Airlines
Deal found 7/24![Multiple Airlines logo]()
$665
This United deal was found by Cheapflights users on 7/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/278:00 am
STL
- YYZ
1 stop7h 56m
Multiple Airlines
Sun 8/3012:55 pm
YYZ
- STL
Nonstop2h 07m
Multiple Airlines
Deal found 7/27![Multiple Airlines logo]()
$688
This United deal was found by Cheapflights users on 7/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/215:30 pm
STL
- YYZ
1 stop5h 29m
Multiple Airlines
Mon 8/247:15 pm
YYZ
- STL
Nonstop2h 09m
Multiple Airlines
Deal found 7/28![Multiple Airlines logo]()
$691
This United deal was found by Cheapflights users on 7/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/285:30 pm
STL
- YYZ
1 stop5h 29m
Multiple Airlines
Sun 8/307:15 pm
YYZ
- STL
Nonstop2h 09m
Multiple Airlines
Deal found 7/27![Multiple Airlines logo]()
$691
Last-minute flights from St. Louis to TorontoDiscover last-minute flight deals from St. Louis to Toronto. Data last updated July 28, 2026 and is based on user searches.
Discover last-minute flight deals from St. Louis to Toronto. Data last updated July 28, 2026 and is based on user searches.
This Kiwi.com deal was found by Cheapflights users on 7/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/174:57 pm
STL
- YYZ
2 stops20h 08m
Multiple Airlines
Wed 8/1912:09 pm
YYZ
- STL
1 stop9h 33m
Multiple Airlines
Deal found 7/25![Multiple Airlines logo]()
$489
This American Airlines deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/176:00 am
STL
- YYZ
1 stop9h 45m
American Airlines
Mon 8/243:14 pm
YYZ
- STL
1 stop10h 00m
American Airlines
Deal found 7/24![American Airlines logo]()
$540
This American Airlines deal was found by Cheapflights users on 7/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/199:32 am
STL
- YYZ
1 stop7h 58m
American Airlines
Mon 8/243:14 pm
YYZ
- STL
1 stop10h 00m
American Airlines
Deal found 7/25![American Airlines logo]()
$420
This Kiwi.com deal was found by Cheapflights users on 7/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/206:30 am
STL
- YYZ
1 stop6h 04m
Multiple Airlines
Sun 8/237:25 am
YYZ
- STL
2 stops34h 57m
Multiple Airlines
Deal found 7/27![Multiple Airlines logo]()
$535
This American Airlines deal was found by Cheapflights users on 7/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/211:25 pm
STL
- YYZ
1 stop9h 04m
American Airlines
Mon 8/243:14 pm
YYZ
- STL
1 stop10h 00m
American Airlines
Deal found 7/28![American Airlines logo]()
$486
This Kiwi.com deal was found by Cheapflights users on 7/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/246:17 pm
STL
- YYZ
2 stops18h 48m
Multiple Airlines
Mon 8/317:45 am
YYZ
- STL
1 stop8h 43m
Multiple Airlines
Deal found 7/25![Multiple Airlines logo]()
$446
This Kiwi.com deal was found by Cheapflights users on 7/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/2711:00 am
STL
- YYZ
1 stop11h 57m
Multiple Airlines
Sun 8/306:30 am
YYZ
- STL
2 stops35h 52m
Multiple Airlines
Deal found 7/27![Multiple Airlines logo]()
$528
This American Airlines deal was found by Cheapflights users on 7/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/276:00 am
STL
- YYZ
1 stop7h 33m
American Airlines
Sun 8/302:15 pm
YYZ
- STL
1 stop8h 14m
American Airlines
Deal found 7/27![American Airlines logo]()
$530
This Justfly.com deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/2812:52 pm
STL
- YYZ
2 stops17h 03m
WestJet
Sun 8/306:00 am
YYZ
- STL
1 stop6h 46m
WestJet
Deal found 7/24![WestJet logo]()
$501
This American Airlines deal was found by Cheapflights users on 7/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/286:00 am
STL
- YYZ
1 stop9h 45m
American Airlines
Tue 9/13:14 pm
YYZ
- STL
1 stop10h 00m
American Airlines
Deal found 7/26![American Airlines logo]()
$533
One-way flights from St. Louis to TorontoSearch for one-way flight options from St. Louis to Toronto. Find affordable one-way fares based on user searches. Data last updated July 28, 2026.
Search for one-way flight options from St. Louis to Toronto. Find affordable one-way fares based on user searches. Data last updated July 28, 2026.
This Kiwi.com deal was found by Cheapflights users on 7/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/1410:35 am
STL
- YYZ
2 stops29h 20m
Multiple Airlines
Deal found 7/28![Multiple Airlines logo]()
$158
This Kiwi.com deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/1210:35 am
STL
- YYZ
2 stops29h 40m
Multiple Airlines
Deal found 7/24![Multiple Airlines logo]()
$162
This Kiwi.com deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/236:17 pm
STL
- YYZ
2 stops19h 38m
Multiple Airlines
Deal found 7/24![Multiple Airlines logo]()
$173
This Kiwi.com deal was found by Cheapflights users on 7/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/192:00 pm
STL
- YYZ
2 stops30h 55m
Multiple Airlines
Deal found 7/23![Multiple Airlines logo]()
$178
This American Airlines deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/196:00 am
STL
- YYZ
1 stop7h 33m
American Airlines
Deal found 7/24![American Airlines logo]()
$182
This American Airlines deal was found by Cheapflights users on 7/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/147:03 am
STL
- YYZ
1 stop8h 45m
American Airlines
Deal found 7/28![American Airlines logo]()
$215
Find flight deals from St. Louis to Toronto
Discover tips and strategies to find the most affordable flight options for your journey from St. Louis (STL) to Toronto (YTO). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated July 28, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $355 (American Airlines) |
One-way from | $161 (Kiwi.com) |
Popular in | August |
Cheapest in | December |
Average price | $654 |
Good round-trip deal | $405 or less |
Good one-way deal | $275 or less |
Cheapflights Fare Finder
Customize your flight search to find flights from St. Louis to Toronto that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated July 28, 2026.
Use the filters below to find and compare flights from St. Louis to Toronto that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
St. LouisToronto
STL - YYZ
STLYYZ
Lambert-St Louis
Tue 9/15
8:00 am-5:01 pm
1 stop8h 01m
Toronto Pearson Intl
Sat 9/19
8:50 am-3:38 pm
1 stop7h 48m
$533
St. LouisToronto
STL - YYZ
STLYYZ
Lambert-St Louis
Mon 8/31
6:54 pm-12:35 pm
1 stop16h 41m
Toronto Pearson Intl
Tue 9/1
6:55 pm-8:39 am
1 stop14h 44m
$553
St. LouisToronto
STL - YYZ
STLYYZ
Lambert-St Louis
Fri 10/30
9:47 am-11:43 pm
2 stops12h 56m
Toronto Pearson Intl
Mon 11/2
5:00 pm-9:17 am
2 stops17h 17m
$619
St. LouisToronto
STL - YYZ
STLYYZ
Lambert-St Louis
Wed 8/19
11:00 am-5:19 pm
1 stop5h 19m
Toronto Pearson Intl
Mon 8/24
10:25 pm-4:44 pm
2 stops19h 19m
$655
St. LouisToronto
STL - YYZ
STLYYZ
Lambert-St Louis
Thu 9/17
8:00 am-11:26 pm
1 stop14h 26m
Toronto Pearson Intl
Mon 9/21
12:55 pm-2:00 pm
Nonstop2h 05m
$660
St. LouisToronto
STL - YYZ
STLYYZ
Lambert-St Louis
Mon 9/21
5:30 pm-3:46 pm
1 stop21h 16m
Toronto Pearson Intl
Wed 9/30
7:15 pm-8:20 pm
Nonstop2h 05m
$665
St. LouisToronto
STL - YYZ
STLYYZ
Lambert-St Louis
Thu 8/27
8:00 am-4:56 pm
1 stop7h 56m
Toronto Pearson Intl
Sun 8/30
12:55 pm-2:02 pm
Nonstop2h 07m
$688
Quickest round-trip
St. LouisToronto
STL - YYZ
STLYYZ
Lambert-St Louis
Fri 8/21
5:30 pm-11:59 pm
1 stop5h 29m
Toronto Pearson Intl
Mon 8/24
7:15 pm-8:24 pm
Nonstop2h 09m
$691
St. LouisToronto
STL - YYZ
STLYYZ
Lambert-St Louis
Fri 8/28
5:30 pm-11:59 pm
1 stop5h 29m
Toronto Pearson Intl
Sun 8/30
7:15 pm-8:24 pm
Nonstop2h 09m
$691
Cheapest one-way
St. LouisToronto
STL - YYZ
STLYYZ
Lambert-St Louis
Sun 8/23
6:17 pm-2:55 pm
2 stops19h 38m
$173
Showing 1-10 of 16 resultsSorted by cheapest first
Compare providers for flights from St. Louis to Toronto
Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from St. Louis to Toronto in July.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars |
- Most accurate provider: When it comes to deals on St. Louis-Toronto flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on St. Louis-Toronto flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from St. Louis-Toronto flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on St. Louis-Toronto flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for St. Louis-Toronto flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.
Best time to book a flight from St. Louis to Toronto
Have a flexible travel schedule? Discover the best time to fly to Toronto from St. Louis with our price prediction graph.
STL-YTO
STL-YYZ
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.
Cheapflights Insights
Everything you need to know about your flight from St. Louis to Toronto
STL-YTO
STL-YYZ
What is the cheapest month to book a flight from St. Louis to Toronto?
Currently, December is the cheapest month in which you can book a flight from St. Louis to Toronto (average of $466). Flying from St. Louis to Toronto in January is currently the most expensive (average of $840). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
What is the cheapest time of day to fly from STL to YTO?
Find hourly flight availability from St. Louis to Toronto. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated July 28, 2026.
When flying from St. Louis to Toronto, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.
Weekly flight availability from St. Louis to Toronto
Explore weekly flight availability from St. Louis to Toronto. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated July 28, 2026.
The most flights from STL to YTO are scheduled on a Monday (4 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (4 on average).
How much does it cost to fly round-trip from St. Louis to Toronto?
Airfare is below average for this route at the moment.
St. Louis to Toronto flights typically cost between $597 and $1,094 in September.The cheapest round-trip price found within the last 5 days was $365 on American Airlines (Sep 17-Sep 21).
How far ahead should I book a flight from St. Louis to Toronto?
Booking 88 days in advance of your planned departure date is, on average, the best time to get cheap flights from St. Louis to Toronto. The general trend is that the closer you book to the departure date, the more expensive your flight will be.
Reviews of airlines servicing Toronto
Get insights into the airlines that provide service to Toronto. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Toronto. Reviews last updated July 28, 2026.
Read through reviews of airlines operating flights from St. Louis to Toronto, such as Delta,United Airlines, andAmerican Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Comfort
7.8
Crew
8.5
Boarding
8.1
Entertainment
7.8
Food
7.2
Overall
7.8
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Comfort
7.8
Crew
8.5
Boarding
8.1
Entertainment
7.8
Food
7.2
Overall
7.8
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Comfort
7.8
Crew
8.5
Boarding
8.1
Entertainment
7.8
Food
7.2
Overall
7.8
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Comfort
7.8
Crew
8.5
Boarding
8.1
Entertainment
7.8
Food
7.2
Overall
7.8
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Comfort
7.8
Crew
8.5
Boarding
8.1
Entertainment
7.8
Food
7.2
Overall
7.8
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Related info for your journey
Find useful and relevant information for your journey from St. Louis to Toronto. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
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St. Louis and Toronto flights
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Top 3 airlines flying from St. Louis to Toronto
Discover the top 3 airlines that operate flights from St. Louis to Toronto. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated July 28, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$247 | Average$613 | FlexibilityNo cancel fee | On-time67% | |
| Cheapest$253 | Average$622 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$270 | Average$545 | FlexibilityNo cancel fee | On-time71% |