$178+ 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 5/5. Fares are subject to change and may not be available on all flights or dates of travel.
STL — YMQ
May 17 — May 241
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
Last-minute
One-way
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 April 17, 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 April 17, 2026.
This American Airlines deal was found by Cheapflights users on 4/14. 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 5/54:30 pm
STL
- YUL
1 stop18h 14m
American Airlines
Tue 5/1212:30 pm
YUL
- STL
1 stop12h 26m
American Airlines
Deal found 4/14![American Airlines logo]()
$477
This American Airlines deal was found by Cheapflights users on 4/15. 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.
Wed 8/266:06 am
STL
- YUL
1 stop9h 38m
American Airlines
Wed 9/212:30 pm
YUL
- STL
1 stop12h 21m
American Airlines
Deal found 4/15![American Airlines logo]()
$498
This Kiwi.com deal was found by Cheapflights users on 4/14. 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 5/126:33 pm
STL
- YUL
2 stops42h 35m
Multiple Airlines
Tue 5/196:51 pm
YUL
- STL
1 stop15h 04m
Multiple Airlines
Deal found 4/14![Multiple Airlines logo]()
$515
This Kiwi.com deal was found by Cheapflights users on 4/16. 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 5/196:33 pm
STL
- YUL
2 stops22h 42m
Multiple Airlines
Tue 5/266:51 pm
YUL
- STL
1 stop15h 04m
Multiple Airlines
Deal found 4/16![Multiple Airlines logo]()
$525
This Gotogate deal was found by Cheapflights users on 4/14. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/141:05 pm
STL
- YUL
Nonstop2h 35m
Air Canada
Sun 5/176:30 pm
YUL
- STL
Nonstop2h 55m
Air Canada
Deal found 4/14![Air Canada logo]()
$526
This Kiwi.com deal was found by Cheapflights users on 4/16. 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 5/196:33 pm
STL
- YUL
2 stops22h 42m
Multiple Airlines
Thu 5/216:51 pm
YUL
- STL
1 stop6h 08m
Multiple Airlines
Deal found 4/16![Multiple Airlines logo]()
$531
This Kiwi.com deal was found by Cheapflights users on 4/16. 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 5/196:33 pm
STL
- YUL
2 stops22h 42m
Multiple Airlines
Sun 5/246:00 am
YUL
- STL
1 stop4h 29m
Multiple Airlines
Deal found 4/16![Multiple Airlines logo]()
$532
This Kiwi.com deal was found by Cheapflights users on 4/13. 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 5/286:33 pm
STL
- YUL
1 stop16h 02m
Multiple Airlines
Thu 6/46:45 am
YUL
- STL
2 stops18h 12m
Multiple Airlines
Deal found 4/13![Multiple Airlines logo]()
$533
This American Airlines deal was found by Cheapflights users on 4/14. 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 5/128:03 pm
STL
- YUL
1 stop14h 41m
American Airlines
Tue 5/1912:30 pm
YUL
- STL
1 stop12h 26m
American Airlines
Deal found 4/14![American Airlines logo]()
$538
This Kiwi.com deal was found by Cheapflights users on 4/16. 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.
Mon 5/185:27 pm
STL
- YUL
2 stops23h 48m
Multiple Airlines
Thu 5/2112:54 pm
YUL
- STL
1 stop5h 22m
Multiple Airlines
Deal found 4/16![Multiple Airlines logo]()
$539
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 April 17, 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 April 17, 2026.
This Delta deal was found by Cheapflights users on 4/16. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/166:04 pm
STL
- YUL
1 stop4h 09m
Delta
Wed 5/279:30 am
YUL
- STL
1 stop12h 09m
Delta
Deal found 4/16![Delta logo]()
$623
This United Airlines deal was found by Cheapflights users on 4/14. 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.
Sat 5/306:00 am
STL
- YUL
1 stop10h 30m
United Airlines
Tue 6/28:40 am
YUL
- STL
1 stop13h 36m
United Airlines
Deal found 4/14![United Airlines logo]()
$626
This Air Canada deal was found by Cheapflights users on 4/12. 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 9/2512:10 pm
STL
- YUL
Nonstop2h 31m
Air Canada
Mon 9/2810:10 am
YUL
- STL
1 stop4h 50m
Air Canada
Deal found 4/12![Air Canada logo]()
$711
This Delta deal was found by Cheapflights users on 4/16. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/296:45 am
STL
- YUL
2 stops11h 08m
Delta
Sat 10/39:28 am
YUL
- STL
1 stop8h 50m
Delta
Deal found 4/16![Delta logo]()
$659
This United Airlines deal was found by Cheapflights users on 4/15. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/309:23 am
STL
- YUL
1 stop11h 03m
United Airlines
Sat 6/69:45 am
YUL
- STL
1 stop12h 31m
United Airlines
Deal found 4/15![United Airlines logo]()
$673
This Air Canada deal was found by Cheapflights users on 4/16. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/2912:10 pm
STL
- YUL
Nonstop2h 31m
Air Canada
Sat 10/39:10 am
YUL
- STL
1 stop5h 50m
Air Canada
Deal found 4/16![Air Canada logo]()
$711
This Delta deal was found by Cheapflights users on 4/15. 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 8/266:00 am
STL
- YUL
2 stops11h 53m
Delta
Wed 9/29:28 am
YUL
- STL
2 stops12h 03m
Delta
Deal found 4/15![Delta logo]()
$717
This Delta deal was found by Cheapflights users on 4/13. 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 6/183:57 pm
STL
- YUL
1 stop7h 02m
Delta
Sun 6/2112:48 pm
YUL
- STL
1 stop10h 26m
Delta
Deal found 4/13![Delta logo]()
$723
This Delta deal was found by Cheapflights users on 4/13. 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 7/16:10 pm
STL
- YUL
1 stop4h 18m
Delta
Sun 7/57:00 am
YUL
- STL
1 stop10h 17m
Delta
Deal found 4/13![Delta logo]()
$723
Last-minute flights from St. Louis to MontrealDiscover last-minute flight deals from St. Louis to Montreal. Data last updated April 17, 2026 and is based on user searches.
Discover last-minute flight deals from St. Louis to Montreal. Data last updated April 17, 2026 and is based on user searches.
This American Airlines deal was found by Cheapflights users on 4/14. 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 5/54:30 pm
STL
- YUL
1 stop18h 14m
American Airlines
Tue 5/1212:30 pm
YUL
- STL
1 stop12h 26m
American Airlines
Deal found 4/14![American Airlines logo]()
$477
This Kiwi.com deal was found by Cheapflights users on 4/14. 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 5/126:33 pm
STL
- YUL
2 stops42h 35m
Multiple Airlines
Tue 5/196:51 pm
YUL
- STL
1 stop15h 04m
Multiple Airlines
Deal found 4/14![Multiple Airlines logo]()
$515
This American Airlines deal was found by Cheapflights users on 4/14. 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 5/128:03 pm
STL
- YUL
1 stop14h 41m
American Airlines
Tue 5/1912:30 pm
YUL
- STL
1 stop12h 26m
American Airlines
Deal found 4/14![American Airlines logo]()
$538
This Gotogate deal was found by Cheapflights users on 4/14. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/141:05 pm
STL
- YUL
Nonstop2h 35m
Air Canada
Sun 5/176:30 pm
YUL
- STL
Nonstop2h 55m
Air Canada
Deal found 4/14![Air Canada logo]()
$526
This Kiwi.com deal was found by Cheapflights users on 4/16. 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.
Mon 5/185:27 pm
STL
- YUL
2 stops23h 48m
Multiple Airlines
Thu 5/2112:54 pm
YUL
- STL
1 stop5h 22m
Multiple Airlines
Deal found 4/16![Multiple Airlines logo]()
$539
This Kiwi.com deal was found by Cheapflights users on 4/16. 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.
Mon 5/185:27 pm
STL
- YUL
2 stops23h 48m
Multiple Airlines
Wed 5/276:00 am
YUL
- STL
1 stop4h 29m
Multiple Airlines
Deal found 4/16![Multiple Airlines logo]()
$540
This Kiwi.com deal was found by Cheapflights users on 4/16. 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 5/196:33 pm
STL
- YUL
2 stops22h 42m
Multiple Airlines
Tue 5/266:51 pm
YUL
- STL
1 stop15h 04m
Multiple Airlines
Deal found 4/16![Multiple Airlines logo]()
$525
This Kiwi.com deal was found by Cheapflights users on 4/16. 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 5/196:33 pm
STL
- YUL
2 stops22h 42m
Multiple Airlines
Thu 5/216:51 pm
YUL
- STL
1 stop6h 08m
Multiple Airlines
Deal found 4/16![Multiple Airlines logo]()
$531
This Kiwi.com deal was found by Cheapflights users on 4/16. 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 5/196:33 pm
STL
- YUL
2 stops22h 42m
Multiple Airlines
Sun 5/246:00 am
YUL
- STL
1 stop4h 29m
Multiple Airlines
Deal found 4/16![Multiple Airlines logo]()
$532
This Kiwi.com deal was found by Cheapflights users on 4/13. 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 5/286:33 pm
STL
- YUL
1 stop16h 02m
Multiple Airlines
Thu 6/46:45 am
YUL
- STL
2 stops18h 12m
Multiple Airlines
Deal found 4/13![Multiple Airlines logo]()
$533
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 April 17, 2026.
Search for one-way flight options from St. Louis to Montreal. Find affordable one-way fares based on user searches. Data last updated April 17, 2026.
This Kiwi.com deal was found by Cheapflights users on 4/14. 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 5/56:41 pm
STL
- YUL
2 stops42h 27m
Multiple Airlines
Deal found 4/14![Multiple Airlines logo]()
$178
This Kiwi.com deal was found by Cheapflights users on 4/13. 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 5/85:27 pm
STL
- YUL
2 stops43h 41m
Multiple Airlines
Deal found 4/13![Multiple Airlines logo]()
$203
This American Airlines deal was found by Cheapflights users on 4/14. 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 5/58:03 pm
STL
- YUL
1 stop14h 41m
American Airlines
Deal found 4/14![American Airlines logo]()
$220
This American Airlines deal was found by Cheapflights users on 4/15. 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.
Tue 8/256:06 am
STL
- YUL
1 stop9h 38m
American Airlines
Deal found 4/15![American Airlines logo]()
$252
This Kiwi.com deal was found by Cheapflights users on 4/12. 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 7/27:03 pm
STL
- YUL
3 stops47h 29m
Multiple Airlines
Deal found 4/12![Multiple Airlines logo]()
$256
This Kiwi.com deal was found by Cheapflights users on 4/12. 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 7/15:06 pm
STL
- YUL
3 stops30h 31m
Multiple Airlines
Deal found 4/12![Multiple Airlines logo]()
$257
This American Airlines deal was found by Cheapflights users on 4/12. 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 7/13:13 pm
STL
- YUL
1 stop17h 35m
American Airlines
Deal found 4/12![American Airlines logo]()
$258
This American Airlines deal was found by Cheapflights users on 4/15. 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.
Sat 5/307:00 am
STL
- YUL
1 stop8h 53m
American Airlines
Deal found 4/15![American Airlines logo]()
$275
This American Airlines deal was found by Cheapflights users on 4/14. 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 5/282:56 pm
STL
- YUL
1 stop17h 54m
American Airlines
Deal found 4/14![American Airlines logo]()
$279
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 April 17, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $477 (American Airlines) |
One-way from | $178 (Kiwi.com) |
Popular in | March |
Cheapest in | June |
Average price | $578 |
Good round-trip deal | $992 or less |
Good one-way deal | $337 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 April 17, 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
Sat 5/16
6:04 pm-11:13 pm
1 stop4h 09m
Montreal Pierre Elliott Trudeau Intl
Wed 5/27
9:30 am-8:39 pm
1 stop12h 09m
$623
St. LouisMontreal
STL - YUL
STLYUL
Lambert-St Louis
Sat 5/30
6:00 am-5:30 pm
1 stop10h 30m
Montreal Pierre Elliott Trudeau Intl
Tue 6/2
8:40 am-9:16 pm
1 stop13h 36m
$626
St. LouisMontreal
STL - YUL
STLYUL
Lambert-St Louis
Tue 9/29
6:45 am-6:53 pm
2 stops11h 08m
Montreal Pierre Elliott Trudeau Intl
Sat 10/3
9:28 am-5:18 pm
1 stop8h 50m
$659
St. LouisMontreal
STL - YUL
STLYUL
Lambert-St Louis
Sat 5/30
9:23 am-9:26 pm
1 stop11h 03m
Montreal Pierre Elliott Trudeau Intl
Sat 6/6
9:45 am-9:16 pm
1 stop12h 31m
$673
Quickest round-trip
St. LouisMontreal
STL - YUL
STLYUL
Lambert-St Louis
Fri 9/25
12:10 pm-3:41 pm
Nonstop2h 31m
Montreal Pierre Elliott Trudeau Intl
Mon 9/28
10:10 am-2:00 pm
1 stop4h 50m
$711
St. LouisMontreal
STL - YUL
STLYUL
Lambert-St Louis
Tue 9/29
12:10 pm-3:41 pm
Nonstop2h 31m
Montreal Pierre Elliott Trudeau Intl
Sat 10/3
9:10 am-2:00 pm
1 stop5h 50m
$711
St. LouisMontreal
STL - YUL
STLYUL
Lambert-St Louis
Wed 8/26
6:00 am-6:53 pm
2 stops11h 53m
Montreal Pierre Elliott Trudeau Intl
Wed 9/2
9:28 am-8:31 pm
2 stops12h 03m
$717
St. LouisMontreal
STL - YUL
STLYUL
Lambert-St Louis
Thu 6/18
3:57 pm-11:59 pm
1 stop7h 02m
Montreal Pierre Elliott Trudeau Intl
Sun 6/21
12:48 pm-10:14 pm
1 stop10h 26m
$723
St. LouisMontreal
STL - YUL
STLYUL
Lambert-St Louis
Wed 7/1
6:10 pm-11:28 pm
1 stop4h 18m
Montreal Pierre Elliott Trudeau Intl
Sun 7/5
7:00 am-4:17 pm
1 stop10h 17m
$723
Cheapest one-way
St. LouisMontreal
STL - YUL
STLYUL
Lambert-St Louis
Fri 5/8
5:27 pm-2:08 pm
2 stops43h 41m
$203
Showing 1-10 of 18 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 April.
| 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
What is the cheapest month to book a flight from St. Louis to Montreal?
Currently, July is the cheapest month in which you can book a flight from St. Louis to Montreal (average of $190). Flying from St. Louis to Montreal in January is currently the most expensive (average of $634). 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 YMQ?
Find hourly flight availability from St. Louis to Montreal. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated April 17, 2026.
When flying from St. Louis to Montreal, 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 Montreal
Explore weekly flight availability from St. Louis to Montreal. 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 April 17, 2026.
The most flights from STL to YMQ are scheduled on a Monday (1 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (1 on average).
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 April 17, 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.
Crew
8.5
Overall
7.9
Entertainment
7.8
Comfort
7.9
Food
7.2
Boarding
8.1
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
Crew
8.5
Overall
7.9
Entertainment
7.8
Comfort
7.9
Food
7.2
Boarding
8.1
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
Crew
8.5
Overall
7.9
Entertainment
7.8
Comfort
7.9
Food
7.2
Boarding
8.1
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
Crew
8.5
Overall
7.9
Entertainment
7.8
Comfort
7.9
Food
7.2
Boarding
8.1
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
Crew
8.5
Overall
7.9
Entertainment
7.8
Comfort
7.9
Food
7.2
Boarding
8.1
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.
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Other flights to Montreal
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St. Louis and Montreal flights
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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 April 17, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$212 | Average$590 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$239 | Average$765 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$318 | Average$647 | FlexibilityNo cancel fee | On-time67% | |
| Cheapest$348 | Average$650 | FlexibilityNo cancel fee | On-time71% |