$142+ Cheap flights from St. Louis (STL) to Toronto (YTO)
This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/15. Fares are subject to change and may not be available on all flights or dates of travel.
STL — YTO
Oct 7 — Oct 141
Round-trip
1 adult, Economy
We work with more than 300 partners to bring you better travel deals
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 March, booked 53 days in advance, depart on a Tuesday or Friday 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 September 7, 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 September 7, 2026.
This Kiwi.com deal was found by Cheapflights users on 9/5. 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 10/224:30 pm -
1 stop26h 35m
Thu 10/299:35 am -
1 stop14h 41m
Deal found 9/5![Multiple Airlines logo]()
$325
This American Airlines deal was found by Cheapflights users on 9/3. 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 9/301:49 pm -
1 stop8h 37m
Wed 10/141:15 pm -
1 stop8h 42m
Deal found 9/3![American Airlines logo]()
$342
This Kiwi.com deal was found by Cheapflights users on 9/3. 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 10/16:39 pm -
1 stop18h 51m
Thu 10/157:45 am -
1 stop16h 28m
Deal found 9/3![Multiple Airlines logo]()
$348
This American Airlines deal was found by Cheapflights users on 9/3. 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 9/245:00 am -
1 stop8h 32m
Sat 9/2611:40 am -
1 stop13h 47m
Deal found 9/3![American Airlines logo]()
$352
This American Airlines deal was found by Cheapflights users on 9/3. 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 10/25:00 am -
1 stop8h 32m
Wed 10/711:40 am -
1 stop10h 17m
Deal found 9/3![American Airlines logo]()
$359
This Kiwi.com deal was found by Cheapflights users on 9/3. 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 9/302:29 pm -
2 stops29h 26m
Thu 10/157:45 am -
1 stop16h 28m
Deal found 9/3![Multiple Airlines logo]()
$361
This Kiwi.com deal was found by Cheapflights users on 9/3. 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 10/194:30 pm -
1 stop21h 00m
Fri 10/234:50 pm -
1 stop7h 23m
Deal found 9/3![Multiple Airlines logo]()
$364
This Kiwi.com deal was found by Cheapflights users on 9/5. 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 10/52:29 pm -
2 stops25h 26m
Sat 10/107:00 am -
1 stop17h 13m
Deal found 9/5![Multiple Airlines logo]()
$367
This Kiwi.com deal was found by Cheapflights users on 9/3. 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 10/146:35 pm -
2 stops43h 20m
Fri 10/234:50 pm -
1 stop7h 23m
Deal found 9/3![Multiple Airlines logo]()
$374
This American Airlines deal was found by Cheapflights users on 9/4. 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 9/255:00 am -
1 stop8h 32m
Fri 10/21:15 pm -
1 stop8h 29m
Deal found 9/4![American Airlines logo]()
$376
This Kiwi.com deal was found by Cheapflights users on 9/3. 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 10/22:29 pm -
2 stops22h 56m
Mon 10/127:45 am -
1 stop16h 28m
Deal found 9/3![Multiple Airlines logo]()
$380
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 September 7, 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 September 7, 2026.
This United Airlines deal was found by Cheapflights users on 9/2. 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.
Fri 10/305:00 am -
1 stop10h 47m
Mon 11/27:26 pm -
1 stop16h 06m
Deal found 9/2![United Airlines logo]()
$558
This Delta deal was found by Cheapflights users on 9/4. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/1211:44 am -
2 stops10h 23m
Sun 1/106:30 am -
1 stop9h 01m
Deal found 9/4![Delta logo]()
$659
This United deal was found by Cheapflights users on 9/3. 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.
Sun 1/249:22 am -
1 stop6h 25m
Thu 1/282:10 pm -
Nonstop2h 16m
Deal found 9/3![Multiple Airlines logo]()
$740
This Air Canada deal was found by Cheapflights users on 9/6. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/306:50 pm -
1 stop4h 09m
Mon 11/22:10 pm -
Nonstop2h 13m
Deal found 9/6![Air Canada logo]()
$771
This United Airlines deal was found by Cheapflights users on 9/3. 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 9/289:04 am -
1 stop8h 27m
Mon 10/1211:00 am -
1 stop11h 21m
Deal found 9/3![United Airlines logo]()
$611
This Delta deal was found by Cheapflights users on 9/7. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 1/46:30 am -
1 stop15h 34m
Sat 1/96:30 am -
1 stop17h 48m
Deal found 9/7![Delta logo]()
$660
This Delta deal was found by Cheapflights users on 9/7. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/76:47 am -
2 stops10h 22m
Wed 10/146:00 am -
1 stop10h 39m
Deal found 9/7![Delta logo]()
$737
Last-minute flights from St. Louis to TorontoDiscover last-minute flight deals from St. Louis to Toronto. Data last updated September 7, 2026 and is based on user searches.
Discover last-minute flight deals from St. Louis to Toronto. Data last updated September 7, 2026 and is based on user searches.
This American Airlines deal was found by Cheapflights users on 9/3. 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 9/245:00 am -
1 stop8h 32m
Sat 9/2611:40 am -
1 stop13h 47m
Deal found 9/3![American Airlines logo]()
$352
This American Airlines deal was found by Cheapflights users on 9/4. 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 9/255:00 am -
1 stop8h 32m
Fri 10/21:15 pm -
1 stop8h 29m
Deal found 9/4![American Airlines logo]()
$376
This American Airlines deal was found by Cheapflights users on 9/3. 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 9/301:49 pm -
1 stop8h 37m
Wed 10/141:15 pm -
1 stop8h 42m
Deal found 9/3![American Airlines logo]()
$342
This Kiwi.com deal was found by Cheapflights users on 9/3. 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 9/302:29 pm -
2 stops29h 26m
Thu 10/157:45 am -
1 stop16h 28m
Deal found 9/3![Multiple Airlines logo]()
$361
This Kiwi.com deal was found by Cheapflights users on 9/3. 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 10/16:39 pm -
1 stop18h 51m
Thu 10/157:45 am -
1 stop16h 28m
Deal found 9/3![Multiple Airlines logo]()
$348
This American Airlines deal was found by Cheapflights users on 9/3. 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 10/25:00 am -
1 stop8h 32m
Wed 10/711:40 am -
1 stop10h 17m
Deal found 9/3![American Airlines logo]()
$359
This Kiwi.com deal was found by Cheapflights users on 9/3. 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 10/22:29 pm -
2 stops22h 56m
Mon 10/127:45 am -
1 stop16h 28m
Deal found 9/3![Multiple Airlines logo]()
$380
This Kiwi.com deal was found by Cheapflights users on 9/5. 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 10/52:29 pm -
2 stops25h 26m
Sat 10/107:00 am -
1 stop17h 13m
Deal found 9/5![Multiple Airlines logo]()
$367
This Kiwi.com deal was found by Cheapflights users on 9/3. 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 10/146:35 pm -
2 stops43h 20m
Fri 10/234:50 pm -
1 stop7h 23m
Deal found 9/3![Multiple Airlines logo]()
$374
This Kiwi.com deal was found by Cheapflights users on 9/3. 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 10/194:30 pm -
1 stop21h 00m
Fri 10/234:50 pm -
1 stop7h 23m
Deal found 9/3![Multiple Airlines logo]()
$364
This Kiwi.com deal was found by Cheapflights users on 9/5. 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 10/224:30 pm -
1 stop26h 35m
Thu 10/299:35 am -
1 stop14h 41m
Deal found 9/5![Multiple Airlines logo]()
$325
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 September 7, 2026.
Search for one-way flight options from St. Louis to Toronto. Find affordable one-way fares based on user searches. Data last updated September 7, 2026.
This American Airlines deal was found by Cheapflights users on 9/3. 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 10/155:00 am -
1 stop8h 33m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/3![American Airlines logo]()
$142
This Kiwi.com deal was found by Cheapflights users on 9/3. 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 11/186:44 pm -
2 stops29h 11m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/3![Multiple Airlines logo]()
$145
This American Airlines deal was found by Cheapflights users on 9/3. 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 11/186:00 am -
1 stop7h 34m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/3![American Airlines logo]()
$146
This American Airlines deal was found by Cheapflights users on 9/2. 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 11/36:00 am -
1 stop7h 34m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/2![American Airlines logo]()
$147
This Kiwi.com deal was found by Cheapflights users on 9/5. 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 10/166:35 pm -
2 stops43h 20m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/5![Multiple Airlines logo]()
$149
This Delta deal was found by Cheapflights users on 9/3. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 1/912:30 pm -
1 stop9h 34m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/3![Delta logo]()
$165
This Kiwi.com deal was found by Cheapflights users on 9/3. 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.
Sat 10/317:59 pm -
3 stops44h 16m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/3![Multiple Airlines logo]()
$169
This Kiwi.com deal was found by Cheapflights users on 9/3. 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 11/192:00 pm -
2 stops27h 10m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/3![Multiple Airlines logo]()
$173
This Kiwi.com deal was found by Cheapflights users on 9/3. 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 10/182:00 pm -
2 stops30h 55m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/3![Multiple Airlines logo]()
$174
This Kiwi.com deal was found by Cheapflights users on 9/4. 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 11/12:00 pm -
2 stops27h 10m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/4![Multiple Airlines logo]()
$175
This Delta deal was found by Cheapflights users on 9/3. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 1/116:30 am -
2 stops11h 37m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/3![Delta logo]()
$176
This Delta deal was found by Cheapflights users on 9/3. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/256:30 am -
1 stop15h 43m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/3![Delta logo]()
$183
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 September 7, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $325 (Kiwi.com) |
One-way from | $142 (American Airlines) |
Popular in | August |
Cheapest in | December |
Average price | $689 |
Good round-trip deal | $574 or less |
Good one-way deal | $351 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 7,457,451 searches. Data last updated September 7, 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 Lambert-St Louis - YYZ Toronto Pearson Intl
STLYYZ
Lambert-St Louis
Wed 1/13
6:30 am-11:04 pm
1 stop15h 34m
Toronto Pearson Intl
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$165
St. LouisToronto
STL Lambert-St Louis - YYZ Toronto Pearson Intl
STLYYZ
Lambert-St Louis
Fri 10/16
6:35 pm-7:55 pm
3 stops24h 20m
Toronto Pearson Intl
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$223
St. LouisToronto
STL Lambert-St Louis - YYZ Toronto Pearson Intl
STLYYZ
Lambert-St Louis
Tue 10/6
7:20 pm-9:55 pm
2 stops25h 35m
Toronto Pearson Intl
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$224
Quickest round-trip
St. LouisToronto
STL Lambert-St Louis - YYZ Toronto Pearson Intl
STLYYZ
Lambert-St Louis
Tue 10/6
2:40 pm-5:34 pm
Nonstop1h 54m
Toronto Pearson Intl
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$273
St. LouisToronto
STL Lambert-St Louis - YYZ Toronto Pearson Intl
STLYYZ
Lambert-St Louis
Tue 1/12
7:30 am-12:52 am
2 stops16h 22m
Toronto Pearson Intl
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$281
St. LouisToronto
STL Lambert-St Louis - YYZ Toronto Pearson Intl
STLYYZ
Lambert-St Louis
Sun 11/1
4:05 pm-6:59 pm
Nonstop1h 54m
Toronto Pearson Intl
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$301
St. LouisToronto
STL Lambert-St Louis - YYZ Toronto Pearson Intl
STLYYZ
Lambert-St Louis
Tue 11/3
6:00 am-5:57 pm
2 stops10h 57m
Toronto Pearson Intl
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$302
St. LouisToronto
STL Lambert-St Louis - YYZ Toronto Pearson Intl
STLYYZ
Lambert-St Louis
Tue 9/22
6:00 am-4:45 pm
1 stop9h 45m
Toronto Pearson Intl
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$321
St. LouisToronto
STL Lambert-St Louis - YYZ Toronto Pearson Intl
STLYYZ
Lambert-St Louis
Tue 1/12
4:05 pm-7:05 pm
Nonstop2h 00m
Toronto Pearson Intl
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$336
St. LouisToronto
STL Lambert-St Louis - YYZ Toronto Pearson Intl
STLYYZ
Lambert-St Louis
Wed 12/30
7:18 am-4:47 pm
1 stop8h 29m
Toronto Pearson Intl
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$354
Showing 1-10 of 17 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 September.
| 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 September 7, 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.
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 $534 and $733 in October.The cheapest round-trip price found within the last 5 days was $325 on Multiple Airlines (Oct 22-Oct 29).
How far ahead should I book a flight from St. Louis to Toronto?
Booking 87 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 September 7, 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.
Overall
7.8
Boarding
8.1
Crew
8.5
Food
7.2
Comfort
7.8
Entertainment
7.8
Reviews
1 / 20
8.0
ExcellentJorge,Aug 2026
TPA - ATL
Overall
7.8
Boarding
8.1
Crew
8.5
Food
7.2
Comfort
7.8
Entertainment
7.8
Reviews
1 / 20
8.0
ExcellentJorge,Aug 2026
TPA - ATL
Overall
7.8
Boarding
8.1
Crew
8.5
Food
7.2
Comfort
7.8
Entertainment
7.8
Reviews
1 / 20
8.0
ExcellentJorge,Aug 2026
TPA - ATL
Overall
7.8
Boarding
8.1
Crew
8.5
Food
7.2
Comfort
7.8
Entertainment
7.8
Reviews
1 / 20
8.0
ExcellentJorge,Aug 2026
TPA - ATL
Overall
7.8
Boarding
8.1
Crew
8.5
Food
7.2
Comfort
7.8
Entertainment
7.8
Reviews
1 / 20
8.0
ExcellentJorge,Aug 2026
TPA - ATL
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.
Browse thousands of different options on Cheapflights for your next trip
Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.
Alternative routes
Complete your trip
Flights by cabin class
Other flight options
Other flights from St. Louis
Popular flights
Toronto flight routes
Alternative routes for St. Louis to Toronto
See prices for flight routes from nearby airports that may be better suited for you.
Complete your trip
Complete your trip to Toronto by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from St. Louis to Toronto by cabin class
Find flights from St. Louis to Toronto, based on your preferred cabin class, be it economy, premium economy, business, or first class.
St. Louis and Toronto flights
Browse other St. Louis and Toronto flight options. Last updated on September 7, 2026.
Other flights from St. Louis
Browse through other flights departing from St. Louis. Flights are based on user searches made on Cheapflights and were last updated on September 7, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Other flights to Toronto
Explore flights to Toronto departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on September 7, 2026.
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 7,457,451 searches. Data last updated September 7, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$253 | Average$632 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$270 | Average$544 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$272 | Average$606 | FlexibilityNo cancel fee | On-time67% |