$201+ 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 8/26. Fares are subject to change and may not be available on all flights or dates of travel.
STL — YMQ
Jul 11 — Jul 181
Round-trip
1 adult, Economy
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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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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 June 11, 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 June 11, 2026.
This Air Canada deal was found by Cheapflights users on 6/8. 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.
Sat 7/412:10 pm
STL
- YUL
Nonstop2h 32m
Air Canada
Fri 7/104:55 pm
YUL
- STL
Nonstop2h 47m
Air Canada
Deal found 6/8![Air Canada logo]()
$505
This Kiwi.com deal was found by Cheapflights users on 6/6. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/216:34 pm
STL
- YUL
2 stops22h 41m
Multiple Airlines
Tue 7/286:47 pm
YUL
- STL
1 stop6h 06m
Multiple Airlines
Deal found 6/6![Multiple Airlines logo]()
$522
This Kiwi.com deal was found by Cheapflights users on 6/8. 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 7/45:06 pm
STL
- YUL
2 stops24h 09m
Multiple Airlines
Fri 7/106:47 pm
YUL
- STL
1 stop6h 06m
Multiple Airlines
Deal found 6/8![Multiple Airlines logo]()
$525
This Kiwi.com deal was found by Cheapflights users on 6/9. 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 8/74:57 pm
STL
- YUL
2 stops24h 18m
Multiple Airlines
Fri 8/146:47 pm
YUL
- STL
1 stop15h 33m
Multiple Airlines
Deal found 6/9![Multiple Airlines logo]()
$526
This Kiwi.com deal was found by Cheapflights users on 6/8. 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 8/186:33 pm
STL
- YUL
2 stops22h 42m
Multiple Airlines
Fri 8/212:29 pm
YUL
- STL
1 stop7h 02m
Multiple Airlines
Deal found 6/8![Multiple Airlines logo]()
$528
This Kiwi.com deal was found by Cheapflights users on 6/9. 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 7/216:34 pm
STL
- YUL
2 stops22h 41m
Multiple Airlines
Fri 7/249:30 am
YUL
- STL
1 stop12h 05m
Multiple Airlines
Deal found 6/9![Multiple Airlines logo]()
$530
This Kiwi.com deal was found by Cheapflights users on 6/9. 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 8/46:34 pm
STL
- YUL
2 stops23h 44m
Multiple Airlines
Fri 8/146:47 pm
YUL
- STL
1 stop15h 33m
Multiple Airlines
Deal found 6/9![Multiple Airlines logo]()
$533
This Kiwi.com deal was found by Cheapflights users on 6/9. 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 8/34:57 pm
STL
- YUL
2 stops44h 11m
Multiple Airlines
Wed 8/127:44 pm
YUL
- STL
1 stop25h 47m
Multiple Airlines
Deal found 6/9![Multiple Airlines logo]()
$537
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 June 11, 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 June 11, 2026.
This Kiwi.com deal was found by Cheapflights users on 6/6. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/216:34 pm
STL
- YUL
2 stops22h 41m
Multiple Airlines
Tue 7/286:47 pm
YUL
- STL
1 stop6h 06m
Multiple Airlines
Deal found 6/6![Multiple Airlines logo]()
$522
This Delta deal was found by Cheapflights users on 6/10. 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 9/176:00 am
STL
- YUL
2 stops11h 53m
Delta
Mon 9/217:43 pm
YUL
- STL
1 stop13h 24m
Delta
Deal found 6/10![Delta logo]()
$615
This United Airlines deal was found by Cheapflights users on 6/8. 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 9/512:59 pm
STL
- YUL
1 stop7h 27m
United Airlines
Wed 9/94:55 pm
YUL
- STL
Nonstop2h 46m
United Airlines
Deal found 6/8![United Airlines logo]()
$617
This Air Canada deal was found by Cheapflights users on 6/10. 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.
Mon 11/304:15 pm
STL
- YUL
1 stop5h 38m
Air Canada
Wed 12/211:10 am
YUL
- STL
1 stop5h 20m
Air Canada
Deal found 6/10![Air Canada logo]()
$634
This oojo deal was found by Cheapflights users on 6/6. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/35:36 pm
STL
- YUL
2 stops22h 09m
WestJet
Wed 7/86:47 pm
YUL
- STL
1 stop6h 06m
WestJet
Deal found 6/6![WestJet logo]()
$654
This United Airlines deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/1512:59 pm
STL
- YUL
1 stop7h 27m
United Airlines
Wed 9/234:55 pm
YUL
- STL
1 stop5h 36m
United Airlines
Deal found 6/10![United Airlines logo]()
$632
This United deal was found by Cheapflights users on 6/11. 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.
Wed 7/110:20 am
STL
- YUL
1 stop6h 10m
Multiple Airlines
Wed 7/84:55 pm
YUL
- STL
Nonstop2h 47m
Multiple Airlines
Deal found 6/11![Multiple Airlines logo]()
$647
This Delta deal was found by Cheapflights users on 6/8. 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.
Sun 8/167:00 am
STL
- YUL
1 stop9h 42m
Delta
Wed 8/199:30 am
YUL
- STL
2 stops12h 12m
Delta
Deal found 6/8![Delta logo]()
$653
This United Airlines deal was found by Cheapflights users on 6/9. 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 6/291:13 pm
STL
- YUL
1 stop7h 13m
United Airlines
Wed 7/84:55 pm
YUL
- STL
Nonstop2h 47m
United Airlines
Deal found 6/9![United Airlines logo]()
$647
This United deal was found by Cheapflights users on 6/10. 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.
Sat 6/279:15 am
STL
- YUL
1 stop7h 15m
Multiple Airlines
Tue 7/144:55 pm
YUL
- STL
Nonstop2h 47m
Multiple Airlines
Deal found 6/10![Multiple Airlines logo]()
$647
This Delta deal was found by Cheapflights users on 6/11. 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 8/315:30 pm
STL
- YUL
1 stop5h 00m
Delta
Wed 9/29:30 am
YUL
- STL
2 stops12h 12m
Delta
Deal found 6/11![Delta logo]()
$658
Last-minute flights from St. Louis to MontrealDiscover last-minute flight deals from St. Louis to Montreal. Data last updated June 11, 2026 and is based on user searches.
Discover last-minute flight deals from St. Louis to Montreal. Data last updated June 11, 2026 and is based on user searches.
This Kiwi.com deal was found by Cheapflights users on 6/8. 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 6/295:06 pm
STL
- YUL
2 stops25h 07m
Multiple Airlines
Tue 7/146:47 pm
YUL
- STL
1 stop6h 06m
Multiple Airlines
Deal found 6/8![Multiple Airlines logo]()
$541
This Kiwi.com deal was found by Cheapflights users on 6/9. 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 6/295:06 pm
STL
- YUL
2 stops25h 07m
Multiple Airlines
Wed 7/87:00 am
YUL
- STL
1 stop6h 17m
Multiple Airlines
Deal found 6/9![Multiple Airlines logo]()
$553
This Air Canada deal was found by Cheapflights users on 6/8. 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.
Sat 7/412:10 pm
STL
- YUL
Nonstop2h 32m
Air Canada
Fri 7/104:55 pm
YUL
- STL
Nonstop2h 47m
Air Canada
Deal found 6/8![Air Canada logo]()
$505
This Kiwi.com deal was found by Cheapflights users on 6/8. 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 7/45:06 pm
STL
- YUL
2 stops24h 09m
Multiple Airlines
Fri 7/106:47 pm
YUL
- STL
1 stop6h 06m
Multiple Airlines
Deal found 6/8![Multiple Airlines logo]()
$525
This Kiwi.com deal was found by Cheapflights users on 6/10. 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 7/45:06 pm
STL
- YUL
2 stops24h 09m
Multiple Airlines
Mon 7/136:47 pm
YUL
- STL
1 stop6h 06m
Multiple Airlines
Deal found 6/10![Multiple Airlines logo]()
$533
This Kiwi.com deal was found by Cheapflights users on 6/6. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/216:34 pm
STL
- YUL
2 stops22h 41m
Multiple Airlines
Tue 7/286:47 pm
YUL
- STL
1 stop6h 06m
Multiple Airlines
Deal found 6/6![Multiple Airlines logo]()
$522
This Kiwi.com deal was found by Cheapflights users on 6/9. 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 7/216:34 pm
STL
- YUL
2 stops22h 41m
Multiple Airlines
Fri 7/249:30 am
YUL
- STL
1 stop12h 05m
Multiple Airlines
Deal found 6/9![Multiple Airlines logo]()
$530
This Gotogate deal was found by Cheapflights users on 6/9. 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.
Fri 7/248:55 am
STL
- YUL
1 stop6h 27m
Air Canada
Fri 7/3110:10 am
YUL
- STL
1 stop4h 52m
Air Canada
Deal found 6/9![Air Canada logo]()
$554
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 June 11, 2026.
Search for one-way flight options from St. Louis to Montreal. Find affordable one-way fares based on user searches. Data last updated June 11, 2026.
This Kiwi.com deal was found by Cheapflights users on 6/6. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/265:33 pm
STL
- YUL
2 stops23h 42m
Multiple Airlines
Deal found 6/6![Multiple Airlines logo]()
$201
This Kiwi.com deal was found by Cheapflights users on 6/9. 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 7/104:57 pm
STL
- YUL
3 stops24h 13m
Multiple Airlines
Deal found 6/9![Multiple Airlines logo]()
$205
This Kiwi.com deal was found by Cheapflights users on 6/8. 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 7/64:57 pm
STL
- YUL
2 stops24h 18m
Multiple Airlines
Deal found 6/8![Multiple Airlines logo]()
$208
This Air Canada deal was found by Cheapflights users on 6/9. 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 8/2112:10 pm
STL
- YUL
Nonstop2h 32m
Air Canada
Deal found 6/9![Air Canada logo]()
$227
This Kiwi.com deal was found by Cheapflights users on 6/9. 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 8/215:33 pm
STL
- YUL
2 stops23h 42m
Multiple Airlines
Deal found 6/9![Multiple Airlines logo]()
$247
This Kiwi.com deal was found by Cheapflights users on 6/7. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 6/286:31 pm
STL
- YUL
2 stops47h 42m
Multiple Airlines
Deal found 6/7![Multiple Airlines logo]()
$252
This Kiwi.com deal was found by Cheapflights users on 6/9. 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 7/96:34 pm
STL
- YUL
2 stops42h 34m
Multiple Airlines
Deal found 6/9![Multiple Airlines logo]()
$257
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 June 11, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $505 (Air Canada) |
One-way from | $201 (Kiwi.com) |
Popular in | March |
Cheapest in | February |
Average price | $608 |
Good round-trip deal | $1,001 or less |
Good one-way deal | $403 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 June 11, 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 7/21
6:34 pm-6:15 pm
2 stops22h 41m
Montreal Pierre Elliott Trudeau Intl
Tue 7/28
6:47 pm-11:53 pm
1 stop6h 06m
$522
St. LouisMontreal
STL - YUL
STLYUL
Lambert-St Louis
Thu 9/17
6:00 am-6:53 pm
2 stops11h 53m
Montreal Pierre Elliott Trudeau Intl
Mon 9/21
7:43 pm-8:07 am
1 stop13h 24m
$615
St. LouisMontreal
STL - YUL
STLYUL
Lambert-St Louis
Sat 9/5
12:59 pm-9:26 pm
1 stop7h 27m
Montreal Pierre Elliott Trudeau Intl
Wed 9/9
4:55 pm-6:41 pm
Nonstop2h 46m
$617
St. LouisMontreal
STL - YUL
STLYUL
Lambert-St Louis
Tue 9/15
12:59 pm-9:26 pm
1 stop7h 27m
Montreal Pierre Elliott Trudeau Intl
Wed 9/23
4:55 pm-9:31 pm
1 stop5h 36m
$632
St. LouisMontreal
STL - YUL
STLYUL
Lambert-St Louis
Mon 11/30
4:15 pm-10:53 pm
1 stop5h 38m
Montreal Pierre Elliott Trudeau Intl
Wed 12/2
11:10 am-3:30 pm
1 stop5h 20m
$634
Quickest round-trip
St. LouisMontreal
STL - YUL
STLYUL
Lambert-St Louis
Wed 7/1
10:20 am-5:30 pm
1 stop6h 10m
Montreal Pierre Elliott Trudeau Intl
Wed 7/8
4:55 pm-6:42 pm
Nonstop2h 47m
$647
St. LouisMontreal
STL - YUL
STLYUL
Lambert-St Louis
Mon 6/29
1:13 pm-9:26 pm
1 stop7h 13m
Montreal Pierre Elliott Trudeau Intl
Wed 7/8
4:55 pm-6:42 pm
Nonstop2h 47m
$647
St. LouisMontreal
STL - YUL
STLYUL
Lambert-St Louis
Sat 6/27
9:15 am-5:30 pm
1 stop7h 15m
Montreal Pierre Elliott Trudeau Intl
Tue 7/14
4:55 pm-6:42 pm
Nonstop2h 47m
$647
St. LouisMontreal
STL - YUL
STLYUL
Lambert-St Louis
Sun 8/16
7:00 am-5:42 pm
1 stop9h 42m
Montreal Pierre Elliott Trudeau Intl
Wed 8/19
9:30 am-8:42 pm
2 stops12h 12m
$653
St. LouisMontreal
STL - YUL
STLYUL
Lambert-St Louis
Fri 7/3
5:36 pm-4:45 pm
2 stops22h 09m
Montreal Pierre Elliott Trudeau Intl
Wed 7/8
6:47 pm-11:53 pm
1 stop6h 06m
$654
Showing 1-10 of 21 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 June.
| 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, August is the cheapest month in which you can book a flight from St. Louis to Montreal (average of $257). Flying from St. Louis to Montreal in November is currently the most expensive (average of $650). 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 June 11, 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 June 11, 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?
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 June 11, 2026.
Read through reviews of airlines operating flights from St. Louis to Montreal, such as Delta,American Airlines, andAir Canada. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Crew
8.5
Food
7.2
Boarding
8.1
Comfort
7.8
Entertainment
7.8
Overall
7.9
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Crew
8.5
Food
7.2
Boarding
8.1
Comfort
7.8
Entertainment
7.8
Overall
7.9
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Crew
8.5
Food
7.2
Boarding
8.1
Comfort
7.8
Entertainment
7.8
Overall
7.9
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Crew
8.5
Food
7.2
Boarding
8.1
Comfort
7.8
Entertainment
7.8
Overall
7.9
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
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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$624 | FlexibilityNo cancel fee | On-time67% | |
| Cheapest$296 | Average$759 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$348 | Average$617 | FlexibilityNo cancel fee | On-time71% |