$169+ Cheap flights from St. Louis (STL) to Montreal (YMQ)
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 5/1. Fares are subject to change and may not be available on all flights or dates of travel.
STL — YMQ
Apr 19 — Apr 261
Round-trip
1 adult, Economy
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Find cheap flights from St. Louis to Montreal 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.Cheap flight deals from St. Louis to Montreal
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Best
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Cheapest flights from St. Louis to MontrealExplore the most affordable flight options available from St. Louis to Montreal. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 20, 2026.
Explore the most affordable flight options available from St. Louis to Montreal. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 20, 2026.
This American Airlines deal was found by Cheapflights users on 3/17. 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 4/144:30 pm
STL
- YUL
1 stop18h 14m
American Airlines
Tue 4/2112:30 pm
YUL
- STL
1 stop10h 49m
American Airlines
Deal found 3/17![American Airlines logo]()
$347
This American Airlines deal was found by Cheapflights users on 3/17. 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 4/298:03 pm
STL
- YUL
1 stop14h 41m
American Airlines
Mon 5/412:30 pm
YUL
- STL
1 stop12h 16m
American Airlines
Deal found 3/17![American Airlines logo]()
$383
This American Airlines deal was found by Cheapflights users on 3/17. 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 5/24:30 pm
STL
- YUL
1 stop18h 14m
American Airlines
Mon 5/412:30 pm
YUL
- STL
1 stop12h 16m
American Airlines
Deal found 3/17![American Airlines logo]()
$421
This American Airlines deal was found by Cheapflights users on 3/15. 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 4/66:33 pm
STL
- YUL
1 stop16h 11m
American Airlines
Sat 4/1112:30 pm
YUL
- STL
1 stop8h 39m
American Airlines
Deal found 3/15![American Airlines logo]()
$422
This American Airlines deal was found by Cheapflights users on 3/17. 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 6/36:00 am
STL
- YUL
1 stop9h 53m
American Airlines
Tue 6/912:30 pm
YUL
- STL
1 stop9h 00m
American Airlines
Deal found 3/17![American Airlines logo]()
$460
This United Airlines deal was found by Cheapflights users on 3/18. 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 4/219:10 am
STL
- YUL
1 stop8h 46m
United Airlines
Sat 4/259:15 am
YUL
- STL
1 stop12h 58m
United Airlines
Deal found 3/18![United Airlines logo]()
$508
Best flights from St. Louis to MontrealDiscover carefully curated flight deals from St. Louis to Montreal that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated March 20, 2026.
Discover carefully curated flight deals from St. Louis to Montreal that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated March 20, 2026.
This United Airlines deal was found by Cheapflights users on 3/19. 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 4/217:45 am
STL
- YUL
1 stop8h 45m
United Airlines
Sat 4/259:45 am
YUL
- STL
1 stop13h 07m
United Airlines
Deal found 3/19![United Airlines logo]()
$508
This American Airlines deal was found by Cheapflights users on 3/18. 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 5/27:05 am
STL
- YUL
2 stops13h 32m
American Airlines
Sat 5/91:03 pm
YUL
- STL
2 stops11h 53m
American Airlines
Deal found 3/18![American Airlines logo]()
$531
This Kiwi.com deal was found by Cheapflights users on 3/19. 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 5/48:23 pm
STL
- YUL
2 stops40h 50m
Multiple Airlines
Mon 5/116:51 pm
YUL
- STL
1 stop6h 08m
Multiple Airlines
Deal found 3/19![Multiple Airlines logo]()
$541
This Delta deal was found by Cheapflights users on 3/15. 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.
Thu 6/251:30 pm
STL
- YUL
1 stop9h 26m
Delta
Sat 7/42:30 pm
YUL
- STL
1 stop19h 14m
Delta
Deal found 3/15![Delta logo]()
$628
This Delta deal was found by Cheapflights users on 3/15. 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 6/39:30 am
STL
- YUL
1 stop8h 23m
Delta
Tue 6/99:28 am
YUL
- STL
2 stops12h 03m
Delta
Deal found 3/15![Delta logo]()
$656
This United Airlines deal was found by Cheapflights users on 3/19. 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.
Thu 6/256:01 am
STL
- YUL
1 stop6h 08m
United Airlines
Sat 7/411:23 am
YUL
- STL
1 stop8h 12m
United Airlines
Deal found 3/19![United Airlines logo]()
$657
This United Airlines deal was found by Cheapflights users on 3/18. 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 4/177:45 am
STL
- YUL
2 stops8h 43m
United Airlines
Fri 4/2411:23 am
YUL
- STL
2 stops10h 50m
United Airlines
Deal found 3/18![United Airlines logo]()
$667
This Delta deal was found by Cheapflights users on 3/17. 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.
Thu 7/236:00 am
STL
- YUL
1 stop6h 39m
Delta
Sun 7/266:00 am
YUL
- STL
1 stop4h 30m
Delta
Deal found 3/17![Delta logo]()
$680
This United Airlines deal was found by Cheapflights users on 3/17. 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 8/76:01 am
STL
- YUL
1 stop6h 08m
United Airlines
Tue 8/189:45 am
YUL
- STL
1 stop6h 53m
United Airlines
Deal found 3/17![United Airlines logo]()
$680
This United Airlines deal was found by Cheapflights users on 3/18. 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.
Thu 7/236:01 am
STL
- YUL
1 stop6h 08m
United Airlines
Sun 7/266:10 am
YUL
- STL
1 stop7h 01m
United Airlines
Deal found 3/18![United Airlines logo]()
$680
Last-minute flights from St. Louis to MontrealDiscover last-minute flight deals from St. Louis to Montreal. Data last updated March 20, 2026 and is based on user searches.
Discover last-minute flight deals from St. Louis to Montreal. Data last updated March 20, 2026 and is based on user searches.
This American Airlines deal was found by Cheapflights users on 3/15. 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 4/66:33 pm
STL
- YUL
1 stop16h 11m
American Airlines
Sat 4/1112:30 pm
YUL
- STL
1 stop8h 39m
American Airlines
Deal found 3/15![American Airlines logo]()
$422
This American Airlines deal was found by Cheapflights users on 3/16. 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 4/134:30 pm
STL
- YUL
1 stop18h 14m
American Airlines
Mon 4/2012:30 pm
YUL
- STL
1 stop12h 16m
American Airlines
Deal found 3/16![American Airlines logo]()
$546
This American Airlines deal was found by Cheapflights users on 3/17. 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 4/144:30 pm
STL
- YUL
1 stop18h 14m
American Airlines
Tue 4/2112:30 pm
YUL
- STL
1 stop10h 49m
American Airlines
Deal found 3/17![American Airlines logo]()
$347
This United Airlines deal was found by Cheapflights users on 3/18. 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 4/219:10 am
STL
- YUL
1 stop8h 46m
United Airlines
Sat 4/259:15 am
YUL
- STL
1 stop12h 58m
United Airlines
Deal found 3/18![United Airlines logo]()
$508
This American Airlines deal was found by Cheapflights users on 3/17. 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 4/298:03 pm
STL
- YUL
1 stop14h 41m
American Airlines
Mon 5/412:30 pm
YUL
- STL
1 stop12h 16m
American Airlines
Deal found 3/17![American Airlines logo]()
$383
This Kiwi.com deal was found by Cheapflights users on 3/17. 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 4/298:23 pm
STL
- YUL
2 stops40h 50m
Multiple Airlines
Mon 5/46:45 pm
YUL
- STL
1 stop5h 51m
Multiple Airlines
Deal found 3/17![Multiple Airlines logo]()
$527
This Kiwi.com deal was found by Cheapflights users on 3/17. 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 4/3011:21 am
STL
- YUL
2 stops26h 29m
Multiple Airlines
Mon 5/46:45 pm
YUL
- STL
1 stop5h 51m
Multiple Airlines
Deal found 3/17![Multiple Airlines logo]()
$552
One-way flights from St. Louis to MontrealSearch for one-way flight options from St. Louis to Montreal. Find affordable one-way fares based on user searches. Data last updated March 20, 2026.
Search for one-way flight options from St. Louis to Montreal. Find affordable one-way fares based on user searches. Data last updated March 20, 2026.
This Kiwi.com deal was found by Cheapflights users on 3/17. 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 5/18:23 pm
STL
- YUL
3 stops43h 52m
Multiple Airlines
Deal found 3/17![Multiple Airlines logo]()
$169
This Kiwi.com deal was found by Cheapflights users on 3/17. 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 5/283:33 pm
STL
- YUL
3 stops49h 47m
Multiple Airlines
Deal found 3/17![Multiple Airlines logo]()
$208
This Kiwi.com deal was found by Cheapflights users on 3/15. 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 4/3011:21 am
STL
- YUL
3 stops28h 41m
Multiple Airlines
Deal found 3/15![Multiple Airlines logo]()
$227
This Kiwi.com deal was found by Cheapflights users on 3/16. 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.
Tue 3/314:51 pm
STL
- YUL
3 stops22h 37m
Multiple Airlines
Deal found 3/16![Multiple Airlines logo]()
$228
This United Airlines deal was found by Cheapflights users on 3/19. 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.
Thu 5/289:23 am
STL
- YUL
1 stop8h 41m
United Airlines
Deal found 3/19![United Airlines logo]()
$243
This Delta deal was found by Cheapflights users on 3/19. 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.
Tue 9/19:00 am
STL
- YUL
1 stop8h 53m
Delta
Deal found 3/19![Delta logo]()
$263
This United Airlines deal was found by Cheapflights users on 3/18. 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.
Thu 4/307:45 am
STL
- YUL
2 stops11h 00m
United Airlines
Deal found 3/18![United Airlines logo]()
$264
Find flight deals from St. Louis to Montreal
Discover tips and strategies to find the most affordable flight options for your journey from St. Louis (STL) to Montreal (YMQ). 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 March 20, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $347 (American Airlines) |
One-way from | $169 (Kiwi.com) |
Popular in | March |
Cheapest in | June |
Average price | $821 |
Good round-trip deal | $864 or less |
Good one-way deal | $315 or less |
Cheapflights Fare Finder
Customize your flight search to find flights from St. Louis to Montreal 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 March 20, 2026.
Use the filters below to find and compare flights from St. Louis to Montreal that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
St. LouisMontreal
STL - YUL
STLYUL
Lambert-St Louis
Tue 4/21
7:45 am-5:30 pm
1 stop8h 45m
Montreal Pierre Elliott Trudeau Intl
Sat 4/25
9:45 am-9:52 pm
1 stop13h 07m
$508
St. LouisMontreal
STL - YUL
STLYUL
Lambert-St Louis
Sat 5/2
7:05 am-9:37 pm
2 stops13h 32m
Montreal Pierre Elliott Trudeau Intl
Sat 5/9
1:03 pm-11:56 pm
2 stops11h 53m
$531
St. LouisMontreal
STL - YUL
STLYUL
Lambert-St Louis
Mon 5/4
8:23 pm-2:13 pm
2 stops40h 50m
Montreal Pierre Elliott Trudeau Intl
Mon 5/11
6:51 pm-11:59 pm
1 stop6h 08m
$541
St. LouisMontreal
STL - YUL
STLYUL
Lambert-St Louis
Thu 6/25
1:30 pm-11:56 pm
1 stop9h 26m
Montreal Pierre Elliott Trudeau Intl
Sat 7/4
2:30 pm-8:44 am
1 stop19h 14m
$628
St. LouisMontreal
STL - YUL
STLYUL
Lambert-St Louis
Wed 6/3
9:30 am-6:53 pm
1 stop8h 23m
Montreal Pierre Elliott Trudeau Intl
Tue 6/9
9:28 am-8:31 pm
2 stops12h 03m
$656
St. LouisMontreal
STL - YUL
STLYUL
Lambert-St Louis
Thu 6/25
6:01 am-1:09 pm
1 stop6h 08m
Montreal Pierre Elliott Trudeau Intl
Sat 7/4
11:23 am-6:35 pm
1 stop8h 12m
$657
St. LouisMontreal
STL - YUL
STLYUL
Lambert-St Louis
Fri 4/17
7:45 am-5:28 pm
2 stops8h 43m
Montreal Pierre Elliott Trudeau Intl
Fri 4/24
11:23 am-9:13 pm
2 stops10h 50m
$667
Quickest round-trip
St. LouisMontreal
STL - YUL
STLYUL
Lambert-St Louis
Thu 7/23
6:00 am-1:39 pm
1 stop6h 39m
Montreal Pierre Elliott Trudeau Intl
Sun 7/26
6:00 am-9:30 am
1 stop4h 30m
$680
St. LouisMontreal
STL - YUL
STLYUL
Lambert-St Louis
Fri 8/7
6:01 am-1:09 pm
1 stop6h 08m
Montreal Pierre Elliott Trudeau Intl
Tue 8/18
9:45 am-3:38 pm
1 stop6h 53m
$680
St. LouisMontreal
STL - YUL
STLYUL
Lambert-St Louis
Thu 7/23
6:01 am-1:09 pm
1 stop6h 08m
Montreal Pierre Elliott Trudeau Intl
Sun 7/26
6:10 am-12:11 pm
1 stop7h 01m
$680
Showing 1-10 of 17 resultsSorted by cheapest first
Compare providers for flights from St. Louis to Montreal
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 Montreal in March.
| 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-Montreal flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on St. Louis-Montreal flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from St. Louis-Montreal flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on St. Louis-Montreal 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-Montreal 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 Montreal
Have a flexible travel schedule? Discover the best time to fly to Montreal from St. Louis with our price prediction graph.
STL-YMQ
STL-YUL
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 Montreal
STL-YMQ
STL-YUL
How much does it cost to fly round-trip from St. Louis to Montreal?
Reviews of airlines servicing Montreal
Get insights into the airlines that provide service to Montreal. 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 Montreal. Reviews last updated March 20, 2026.
Read through reviews of airlines operating flights from St. Louis to Montreal, 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
7.9
Boarding
8.1
Entertainment
7.8
Food
7.2
Crew
8.5
Overall
7.9
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
Comfort
7.9
Boarding
8.1
Entertainment
7.8
Food
7.2
Crew
8.5
Overall
7.9
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
Comfort
7.9
Boarding
8.1
Entertainment
7.8
Food
7.2
Crew
8.5
Overall
7.9
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
Comfort
7.9
Boarding
8.1
Entertainment
7.8
Food
7.2
Crew
8.5
Overall
7.9
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
Comfort
7.9
Boarding
8.1
Entertainment
7.8
Food
7.2
Crew
8.5
Overall
7.9
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
Related info for your journey
Find useful and relevant information for your journey from St. Louis to Montreal. 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
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Alternative routes for St. Louis to Montreal
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Complete your trip
Complete your trip to Montreal by adding a car rental and/or hotel reservation to your travel itinerary.
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Find flights from St. Louis to Montreal, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Other flights to Montreal
Explore flights to Montreal departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on March 20, 2026.
St. Louis and Montreal flights
Browse other St. Louis and Montreal flight options. Last updated on March 20, 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 March 20, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Top 4 airlines flying from St. Louis to Montreal
Discover the top 4 airlines that operate flights from St. Louis to Montreal. 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 March 20, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$212 | Average$683 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$239 | Average$765 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$318 | Average$661 | FlexibilityNo cancel fee | On-time67% | |
| Cheapest$348 | Average$650 | FlexibilityNo cancel fee | On-time71% |