$209+ 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 9/13. Fares are subject to change and may not be available on all flights or dates of travel.
STL — YMQ
Aug 25 — Sep 11
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
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Cheapest
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 July 26, 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 July 26, 2026.
This American Airlines deal was found by Cheapflights users on 7/21. 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 8/184:54 pm
STL
- YUL
1 stop17h 49m
American Airlines
Fri 8/215:34 pm
YUL
- STL
1 stop15h 50m
American Airlines
Deal found 7/21![American Airlines logo]()
$465
This American Airlines deal was found by Cheapflights users on 7/21. 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 8/188:07 pm
STL
- YUL
1 stop14h 36m
American Airlines
Tue 8/255:34 pm
YUL
- STL
1 stop15h 50m
American Airlines
Deal found 7/21![American Airlines logo]()
$476
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 10/177:29 am
STL
- YUL
1 stop8h 23m
American Airlines
Sat 10/2412:30 pm
YUL
- STL
1 stop12h 28m
American Airlines
Deal found 7/24![American Airlines logo]()
$485
This American Airlines deal was found by Cheapflights users on 7/22. 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 8/259:32 am
STL
- YUL
2 stops11h 12m
American Airlines
Fri 8/285:34 pm
YUL
- STL
1 stop15h 50m
American Airlines
Deal found 7/22![American Airlines logo]()
$486
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 9/74:50 pm
STL
- YUL
1 stop17h 53m
American Airlines
Mon 9/145:34 pm
YUL
- STL
1 stop17h 46m
American Airlines
Deal found 7/24![American Airlines logo]()
$496
This American Airlines deal was found by Cheapflights users on 7/21. 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 9/74:50 pm
STL
- YUL
1 stop17h 53m
American Airlines
Fri 9/1112:31 pm
YUL
- STL
1 stop12h 56m
American Airlines
Deal found 7/21![American Airlines logo]()
$524
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 9/82:55 pm
STL
- YUL
1 stop17h 54m
American Airlines
Tue 9/1512:31 pm
YUL
- STL
1 stop12h 56m
American Airlines
Deal found 7/25![American Airlines logo]()
$531
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.
Mon 8/317:58 pm
STL
- YUL
2 stops26h 47m
Multiple Airlines
Fri 9/42:46 pm
YUL
- STL
1 stop10h 12m
Multiple Airlines
Deal found 7/23![Multiple Airlines logo]()
$563
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.
Fri 10/24:37 pm
STL
- YUL
1 stop16h 12m
American Airlines
Tue 10/65:34 pm
YUL
- STL
1 stop18h 17m
American Airlines
Deal found 7/25![American Airlines logo]()
$566
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 July 26, 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 July 26, 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.
Thu 10/18:00 am
STL
- YUL
1 stop8h 30m
United Airlines
Tue 10/131:15 pm
YUL
- STL
1 stop9h 06m
United Airlines
Deal found 7/23![United Airlines logo]()
$603
This Flightnetwork deal was found by Cheapflights users on 7/21. 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 Flightnetwork 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
Sun 9/279:10 am
YUL
- STL
1 stop5h 50m
Air Canada
Deal found 7/21![Air Canada logo]()
$612
This Delta deal was found by Cheapflights users on 7/22. 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 10/276:40 am
STL
- YUL
2 stops11h 10m
Delta
Fri 10/3011:15 am
YUL
- STL
2 stops11h 01m
Delta
Deal found 7/22![Delta logo]()
$653
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 9/36:25 pm
STL
- YUL
1 stop4h 05m
Multiple Airlines
Mon 9/77:20 pm
YUL
- STL
2 stops42h 50m
Multiple Airlines
Deal found 7/24![Multiple Airlines logo]()
$688
This Delta deal was found by Cheapflights users on 7/22. 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 8/256:30 am
STL
- YUL
2 stops11h 24m
Delta
Fri 8/289:30 am
YUL
- STL
2 stops12h 12m
Delta
Deal found 7/22![Delta logo]()
$667
This United 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/95:36 pm
STL
- YUL
1 stop17h 24m
United Airlines
Mon 10/121:15 pm
YUL
- STL
1 stop9h 06m
United Airlines
Deal found 7/25![United Airlines logo]()
$689
This United deal was found by Cheapflights users on 7/22. 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.
Tue 8/257:25 am
STL
- YUL
1 stop9h 05m
Multiple Airlines
Fri 8/284:55 pm
YUL
- STL
Nonstop2h 47m
Multiple Airlines
Deal found 7/22![Multiple Airlines logo]()
$707
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.
Sun 8/3012:10 pm
STL
- YUL
Nonstop2h 32m
United Airlines
Tue 9/16:30 pm
YUL
- STL
1 stop21h 27m
United Airlines
Deal found 7/23![United Airlines logo]()
$696
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 1/16:00 am
STL
- YUL
1 stop10h 55m
Delta
Wed 1/69:28 am
YUL
- STL
1 stop9h 30m
Delta
Deal found 7/24![Delta logo]()
$723
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.
Thu 10/18:00 am
STL
- YUL
1 stop8h 30m
United Airlines
Thu 10/89:45 am
YUL
- STL
1 stop12h 36m
United Airlines
Deal found 7/23![United Airlines logo]()
$719
Last-minute flights from St. Louis to MontrealDiscover last-minute flight deals from St. Louis to Montreal. Data last updated July 26, 2026 and is based on user searches.
Discover last-minute flight deals from St. Louis to Montreal. Data last updated July 26, 2026 and is based on user searches.
This American Airlines deal was found by Cheapflights users on 7/21. 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 8/184:54 pm
STL
- YUL
1 stop17h 49m
American Airlines
Fri 8/215:34 pm
YUL
- STL
1 stop15h 50m
American Airlines
Deal found 7/21![American Airlines logo]()
$465
This American Airlines deal was found by Cheapflights users on 7/21. 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 8/188:07 pm
STL
- YUL
1 stop14h 36m
American Airlines
Tue 8/255:34 pm
YUL
- STL
1 stop15h 50m
American Airlines
Deal found 7/21![American Airlines logo]()
$476
This American Airlines deal was found by Cheapflights users on 7/22. 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 8/259:32 am
STL
- YUL
2 stops11h 12m
American Airlines
Fri 8/285:34 pm
YUL
- STL
1 stop15h 50m
American Airlines
Deal found 7/22![American Airlines logo]()
$486
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.
Thu 8/272:55 pm
STL
- YUL
1 stop17h 51m
American Airlines
Mon 8/3112:30 pm
YUL
- STL
1 stop12h 44m
American Airlines
Deal found 7/25![American Airlines logo]()
$586
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 8/276:17 pm
STL
- YUL
2 stops18h 51m
Multiple Airlines
Mon 8/317:00 am
YUL
- STL
1 stop11h 22m
Multiple Airlines
Deal found 7/25![Multiple Airlines logo]()
$611
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 8/286:17 pm
STL
- YUL
2 stops18h 51m
Multiple Airlines
Sun 8/307:00 am
YUL
- STL
1 stop5h 46m
Multiple Airlines
Deal found 7/25![Multiple Airlines logo]()
$580
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.
Sun 8/308:07 pm
STL
- YUL
1 stop14h 36m
American Airlines
Thu 9/312:30 pm
YUL
- STL
1 stop12h 44m
American Airlines
Deal found 7/25![American Airlines logo]()
$601
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.
Mon 8/317:58 pm
STL
- YUL
2 stops26h 47m
Multiple Airlines
Fri 9/42:46 pm
YUL
- STL
1 stop10h 12m
Multiple Airlines
Deal found 7/23![Multiple Airlines logo]()
$563
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 July 26, 2026.
Search for one-way flight options from St. Louis to Montreal. Find affordable one-way fares based on user searches. Data last updated July 26, 2026.
This Kiwi.com deal was found by Cheapflights users on 7/21. 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 9/1310:35 am
STL
- YUL
3 stops36h 50m
Multiple Airlines
Deal found 7/21![Multiple Airlines logo]()
$209
This American Airlines deal was found by Cheapflights users on 7/22. 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 10/77:29 am
STL
- YUL
1 stop8h 23m
American Airlines
Deal found 7/22![American Airlines logo]()
$210
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 8/228:06 pm
STL
- YUL
1 stop14h 37m
American Airlines
Deal found 7/24![American Airlines logo]()
$214
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
- YUL
3 stops48h 53m
Multiple Airlines
Deal found 7/24![Multiple Airlines logo]()
$243
This American Airlines deal was found by Cheapflights users on 7/21. 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 10/147:29 am
STL
- YUL
1 stop8h 23m
American Airlines
Deal found 7/21![American Airlines logo]()
$245
This American Airlines deal was found by Cheapflights users on 7/21. 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 10/135:27 pm
STL
- YUL
1 stop17h 17m
American Airlines
Deal found 7/21![American Airlines logo]()
$251
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 8/187:25 am
STL
- YUL
1 stop10h 38m
United Airlines
Deal found 7/23![United Airlines logo]()
$257
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/76:40 am
STL
- YUL
2 stops11h 19m
Delta
Deal found 7/24![Delta logo]()
$269
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 July 26, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $465 (American Airlines) |
One-way from | $209 (Kiwi.com) |
Popular in | March |
Cheapest in | February |
Average price | $582 |
Good round-trip deal | $879 or less |
Good one-way deal | $413 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 July 26, 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
Thu 10/1
8:00 am-5:30 pm
1 stop8h 30m
Montreal Pierre Elliott Trudeau Intl
Tue 10/13
1:15 pm-9:21 pm
1 stop9h 06m
$603
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
Sun 9/27
9:10 am-2:00 pm
1 stop5h 50m
$612
St. LouisMontreal
STL - YUL
STLYUL
Lambert-St Louis
Tue 10/27
6:40 am-6:50 pm
2 stops11h 10m
Montreal Pierre Elliott Trudeau Intl
Fri 10/30
11:15 am-9:16 pm
2 stops11h 01m
$653
St. LouisMontreal
STL - YUL
STLYUL
Lambert-St Louis
Tue 8/25
6:30 am-6:54 pm
2 stops11h 24m
Montreal Pierre Elliott Trudeau Intl
Fri 8/28
9:30 am-8:42 pm
2 stops12h 12m
$667
St. LouisMontreal
STL - YUL
STLYUL
Lambert-St Louis
Thu 9/3
6:25 pm-11:30 pm
1 stop4h 05m
Montreal Pierre Elliott Trudeau Intl
Mon 9/7
7:20 pm-1:10 pm
2 stops42h 50m
$688
St. LouisMontreal
STL - YUL
STLYUL
Lambert-St Louis
Fri 10/9
5:36 pm-12:00 pm
1 stop17h 24m
Montreal Pierre Elliott Trudeau Intl
Mon 10/12
1:15 pm-9:21 pm
1 stop9h 06m
$689
St. LouisMontreal
STL - YUL
STLYUL
Lambert-St Louis
Sun 8/30
12:10 pm-3:42 pm
Nonstop2h 32m
Montreal Pierre Elliott Trudeau Intl
Tue 9/1
6:30 pm-2:57 pm
1 stop21h 27m
$696
St. LouisMontreal
STL - YUL
STLYUL
Lambert-St Louis
Tue 8/25
7:25 am-5:30 pm
1 stop9h 05m
Montreal Pierre Elliott Trudeau Intl
Fri 8/28
4:55 pm-6:42 pm
Nonstop2h 47m
$707
St. LouisMontreal
STL - YUL
STLYUL
Lambert-St Louis
Thu 10/1
8:00 am-5:30 pm
1 stop8h 30m
Montreal Pierre Elliott Trudeau Intl
Thu 10/8
9:45 am-9:21 pm
1 stop12h 36m
$719
St. LouisMontreal
STL - YUL
STLYUL
Lambert-St Louis
Fri 1/1
6:00 am-5:55 pm
1 stop10h 55m
Montreal Pierre Elliott Trudeau Intl
Wed 1/6
9:28 am-5:58 pm
1 stop9h 30m
$723
Showing 1-10 of 16 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 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-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, February is the cheapest month in which you can book a flight from St. Louis to Montreal (average of $506). Flying from St. Louis to Montreal in March is currently the most expensive (average of $779). 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 July 26, 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 July 26, 2026.
The most flights from STL to YMQ are scheduled on a Monday (2 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (2 on average).
How much does it cost to fly round-trip from St. Louis to Montreal?
Airfare is below average for this route at the moment.
St. Louis to Montreal flights typically cost between $510 and $718 in August.The cheapest round-trip price found within the last 5 days was $465 on American Airlines (Aug 18-Aug 21).
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 July 26, 2026.
Read through reviews of airlines operating flights from St. Louis to Montreal, such as Delta,United Airlines, andAir Canada. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Overall
7.8
Comfort
7.8
Crew
8.5
Food
7.2
Entertainment
7.8
Boarding
8.1
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Overall
7.8
Comfort
7.8
Crew
8.5
Food
7.2
Entertainment
7.8
Boarding
8.1
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Overall
7.8
Comfort
7.8
Crew
8.5
Food
7.2
Entertainment
7.8
Boarding
8.1
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Overall
7.8
Comfort
7.8
Crew
8.5
Food
7.2
Entertainment
7.8
Boarding
8.1
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Related info for your journey
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Top 3 airlines flying from St. Louis to Montreal
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| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$257 | Average$636 | FlexibilityNo cancel fee | On-time67% | |
| Cheapest$296 | Average$754 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$368 | Average$709 | FlexibilityNo cancel fee | On-time71% |