$219+ 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 7/12. Fares are subject to change and may not be available on all flights or dates of travel.
STL — YMQ
Jun 16 — Jun 231
Round-trip
1 adult, Economy
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Find cheap flights from St. Louis to Montreal with Cheapflights
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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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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
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 May 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 May 17, 2026.
This Gotogate deal was found by Cheapflights users on 5/16. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/112:10 pm
STL
- YUL
Nonstop2h 32m
Air Canada
Tue 8/44:55 pm
YUL
- STL
Nonstop2h 47m
Air Canada
Deal found 5/16![Air Canada logo]()
$436
This American Airlines deal was found by Cheapflights users on 5/13. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/188:06 pm
STL
- YUL
1 stop14h 38m
American Airlines
Tue 8/2512:30 pm
YUL
- STL
1 stop12h 29m
American Airlines
Deal found 5/13![American Airlines logo]()
$476
This Booking.com deal was found by Cheapflights users on 5/12. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/281:05 pm
STL
- YUL
Nonstop2h 35m
Air Canada
Sun 5/316:30 pm
YUL
- STL
Nonstop2h 55m
Air Canada
Deal found 5/12![Air Canada logo]()
$487
This Kiwi.com deal was found by Cheapflights users on 5/16. 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.
Fri 6/55:27 pm
STL
- YUL
2 stops23h 48m
Multiple Airlines
Sun 6/76:50 pm
YUL
- STL
1 stop6h 06m
Multiple Airlines
Deal found 5/16![Multiple Airlines logo]()
$502
This Air Canada deal was found by Cheapflights users on 5/15. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/1112:10 pm
STL
- YUL
Nonstop2h 32m
Air Canada
Wed 8/124:55 pm
YUL
- STL
Nonstop2h 47m
Air Canada
Deal found 5/15![Air Canada logo]()
$513
This Air Canada deal was found by Cheapflights users on 5/17. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/12:15 pm
STL
- YUL
1 stop5h 36m
Air Canada
Thu 6/46:30 pm
YUL
- STL
Nonstop2h 55m
Air Canada
Deal found 5/17![Air Canada logo]()
$516
This Air Canada deal was found by Cheapflights users on 5/16. 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.
Wed 7/1512:10 pm
STL
- YUL
Nonstop2h 32m
Air Canada
Sun 7/197:30 am
YUL
- STL
1 stop7h 32m
Air Canada
Deal found 5/16![Air Canada logo]()
$527
This Air Canada deal was found by Cheapflights users on 5/16. 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.
Fri 6/192:15 pm
STL
- YUL
1 stop6h 35m
Air Canada
Sun 6/218:10 am
YUL
- STL
1 stop5h 11m
Air Canada
Deal found 5/16![Air Canada logo]()
$529
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 May 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 May 17, 2026.
This Air Canada deal was found by Cheapflights users on 5/16. 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 8/1112:10 pm
STL
- YUL
Nonstop2h 32m
Air Canada
Wed 8/124:55 pm
YUL
- STL
Nonstop2h 47m
Air Canada
Deal found 5/16![Air Canada logo]()
$513
This Delta deal was found by Cheapflights users on 5/16. 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 9/86:45 am
STL
- YUL
1 stop8h 16m
Delta
Sun 9/137:00 am
YUL
- STL
1 stop6h 53m
Delta
Deal found 5/16![Delta logo]()
$547
This United Airlines deal was found by Cheapflights users on 5/13. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/91:13 pm
STL
- YUL
2 stops7h 53m
United Airlines
Fri 6/124:55 pm
YUL
- STL
1 stop5h 35m
United Airlines
Deal found 5/13![United Airlines logo]()
$583
This Air Canada deal was found by Cheapflights users on 5/15. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/2512:10 pm
STL
- YUL
Nonstop2h 32m
Air Canada
Tue 7/288:10 am
YUL
- STL
1 stop6h 52m
Air Canada
Deal found 5/15![Air Canada logo]()
$583
This United Airlines deal was found by Cheapflights users on 5/16. 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 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
Mon 7/279:45 am
YUL
- STL
1 stop7h 01m
United Airlines
Deal found 5/16![United Airlines logo]()
$594
This United Airlines deal was found by Cheapflights users on 5/14. 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.
Wed 7/1511:25 am
STL
- YUL
1 stop5h 05m
United Airlines
Sat 7/189:45 am
YUL
- STL
1 stop7h 01m
United Airlines
Deal found 5/14![United Airlines logo]()
$594
This United Airlines deal was found by Cheapflights users on 5/14. 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 9/1210:24 am
STL
- YUL
1 stop6h 06m
United Airlines
Wed 9/1611:23 am
YUL
- STL
1 stop5h 24m
United Airlines
Deal found 5/14![United Airlines logo]()
$594
Last-minute flights from St. Louis to MontrealDiscover last-minute flight deals from St. Louis to Montreal. Data last updated May 17, 2026 and is based on user searches.
Discover last-minute flight deals from St. Louis to Montreal. Data last updated May 17, 2026 and is based on user searches.
This Booking.com deal was found by Cheapflights users on 5/12. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/281:05 pm
STL
- YUL
Nonstop2h 35m
Air Canada
Sun 5/316:30 pm
YUL
- STL
Nonstop2h 55m
Air Canada
Deal found 5/12![Air Canada logo]()
$487
This Air Canada deal was found by Cheapflights users on 5/17. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/12:15 pm
STL
- YUL
1 stop5h 36m
Air Canada
Thu 6/46:30 pm
YUL
- STL
Nonstop2h 55m
Air Canada
Deal found 5/17![Air Canada logo]()
$516
This Kiwi.com deal was found by Cheapflights users on 5/14. 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.
Thu 6/46:33 pm
STL
- YUL
2 stops22h 42m
Multiple Airlines
Mon 6/87:00 am
YUL
- STL
1 stop8h 52m
Multiple Airlines
Deal found 5/14![Multiple Airlines logo]()
$534
This Kiwi.com deal was found by Cheapflights users on 5/16. 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.
Fri 6/55:27 pm
STL
- YUL
2 stops23h 48m
Multiple Airlines
Sun 6/76:50 pm
YUL
- STL
1 stop6h 06m
Multiple Airlines
Deal found 5/16![Multiple Airlines logo]()
$502
This Air Canada deal was found by Cheapflights users on 5/13. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/82:15 pm
STL
- YUL
1 stop5h 36m
Air Canada
Fri 6/126:30 pm
YUL
- STL
Nonstop2h 55m
Air Canada
Deal found 5/13![Air Canada logo]()
$561
This Kiwi.com deal was found by Cheapflights users on 5/17. 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 6/125:06 pm
STL
- YUL
2 stops24h 09m
Multiple Airlines
Fri 6/196:50 pm
YUL
- STL
1 stop6h 06m
Multiple Airlines
Deal found 5/17![Multiple Airlines logo]()
$537
This Air Canada deal was found by Cheapflights users on 5/16. 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.
Fri 6/192:15 pm
STL
- YUL
1 stop6h 35m
Air Canada
Sun 6/218:10 am
YUL
- STL
1 stop5h 11m
Air Canada
Deal found 5/16![Air Canada logo]()
$529
This Air Canada deal was found by Cheapflights users on 5/15. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/291:20 pm
STL
- YUL
Nonstop2h 35m
Air Canada
Mon 7/610:10 am
YUL
- STL
1 stop4h 52m
Air Canada
Deal found 5/15![Air Canada logo]()
$527
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 May 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 May 17, 2026.
This Flightnetwork deal was found by Cheapflights users on 5/16. 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 Flightnetwork is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/1212:10 pm
STL
- YUL
Nonstop2h 32m
Air Canada
Deal found 5/16![Air Canada logo]()
$219
This Kiwi.com deal was found by Cheapflights users on 5/15. 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.
Mon 6/295:06 pm
STL
- YUL
3 stops26h 04m
Multiple Airlines
Deal found 5/15![Multiple Airlines logo]()
$227
This Air Canada deal was found by Cheapflights users on 5/16. 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.
Sat 6/271:20 pm
STL
- YUL
Nonstop2h 35m
Air Canada
Deal found 5/16![Air Canada logo]()
$230
This American Airlines deal was found by Cheapflights users on 5/13. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/77:38 am
STL
- YUL
1 stop7h 47m
American Airlines
Deal found 5/13![American Airlines logo]()
$233
This American Airlines deal was found by Cheapflights users on 5/16. 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.
Tue 6/306:15 am
STL
- YUL
1 stop5h 13m
American Airlines
Deal found 5/16![American Airlines logo]()
$237
This American Airlines deal was found by Cheapflights users on 5/16. 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.
Sat 6/277:30 am
STL
- YUL
1 stop14h 29m
American Airlines
Deal found 5/16![American Airlines logo]()
$240
This Air Canada deal was found by Cheapflights users on 5/15. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/292:15 pm
STL
- YUL
1 stop5h 42m
Air Canada
Deal found 5/15![Air Canada logo]()
$241
This Kiwi.com deal was found by Cheapflights users on 5/16. 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.
Sat 6/275:06 pm
STL
- YUL
3 stops43h 34m
Multiple Airlines
Deal found 5/16![Multiple Airlines logo]()
$246
This Air Canada deal was found by Cheapflights users on 5/13. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/281:05 pm
STL
- YUL
Nonstop2h 35m
Air Canada
Deal found 5/13![Air Canada logo]()
$247
This Kiwi.com deal was found by Cheapflights users on 5/15. 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 7/26:31 pm
STL
- YUL
3 stops46h 39m
Multiple Airlines
Deal found 5/15![Multiple Airlines logo]()
$250
This Kiwi.com deal was found by Cheapflights users on 5/16. 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.
Sun 6/286:31 pm
STL
- YUL
3 stops28h 54m
Multiple Airlines
Deal found 5/16![Multiple Airlines logo]()
$251
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 May 17, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $436 (Gotogate) |
One-way from | $219 (Flightnetwork) |
Popular in | October |
Cheapest in | June |
Average price | $610 |
Good round-trip deal | $1,056 or less |
Good one-way deal | $462 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 May 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
Quickest round-trip
St. LouisMontreal
STL - YUL
STLYUL
Lambert-St Louis
Tue 8/11
12:10 pm-3:42 pm
Nonstop2h 32m
Montreal Pierre Elliott Trudeau Intl
Wed 8/12
4:55 pm-6:42 pm
Nonstop2h 47m
$513
St. LouisMontreal
STL - YUL
STLYUL
Lambert-St Louis
Tue 9/8
6:45 am-4:01 pm
1 stop8h 16m
Montreal Pierre Elliott Trudeau Intl
Sun 9/13
7:00 am-12:53 pm
1 stop6h 53m
$547
St. LouisMontreal
STL - YUL
STLYUL
Lambert-St Louis
Tue 6/9
1:13 pm-10:06 pm
2 stops7h 53m
Montreal Pierre Elliott Trudeau Intl
Fri 6/12
4:55 pm-9:30 pm
1 stop5h 35m
$583
St. LouisMontreal
STL - YUL
STLYUL
Lambert-St Louis
Sat 7/25
12:10 pm-3:42 pm
Nonstop2h 32m
Montreal Pierre Elliott Trudeau Intl
Tue 7/28
8:10 am-2:02 pm
1 stop6h 52m
$583
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
Mon 7/27
9:45 am-3:46 pm
1 stop7h 01m
$594
St. LouisMontreal
STL - YUL
STLYUL
Lambert-St Louis
Wed 7/15
11:25 am-5:30 pm
1 stop5h 05m
Montreal Pierre Elliott Trudeau Intl
Sat 7/18
9:45 am-3:46 pm
1 stop7h 01m
$594
St. LouisMontreal
STL - YUL
STLYUL
Lambert-St Louis
Sat 9/12
10:24 am-5:30 pm
1 stop6h 06m
Montreal Pierre Elliott Trudeau Intl
Wed 9/16
11:23 am-3:47 pm
1 stop5h 24m
$594
Cheapest one-way
St. LouisMontreal
STL - YUL
STLYUL
Lambert-St Louis
Wed 10/7
7:38 am-4:25 pm
1 stop7h 47m
$233
St. LouisMontreal
STL - YUL
STLYUL
Lambert-St Louis
Tue 6/30
6:15 am-12:28 pm
1 stop5h 13m
$237
St. LouisMontreal
STL - YUL
STLYUL
Lambert-St Louis
Thu 5/28
1:05 pm-4:40 pm
Nonstop2h 35m
$247
Showing 1-10 of 14 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 May.
| 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 $212). 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 May 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 May 17, 2026.
The most flights from STL to YMQ are scheduled on a Monday (3 on average). You will have fewer flight options on Thursday, 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 May 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.
Comfort
7.8
Overall
7.9
Boarding
8.1
Entertainment
7.8
Crew
8.5
Food
7.2
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Comfort
7.8
Overall
7.9
Boarding
8.1
Entertainment
7.8
Crew
8.5
Food
7.2
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Comfort
7.8
Overall
7.9
Boarding
8.1
Entertainment
7.8
Crew
8.5
Food
7.2
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Comfort
7.8
Overall
7.9
Boarding
8.1
Entertainment
7.8
Crew
8.5
Food
7.2
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Comfort
7.8
Overall
7.9
Boarding
8.1
Entertainment
7.8
Crew
8.5
Food
7.2
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
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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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.
Search flights from St. Louis to Montreal by cabin class
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 May 17, 2026.
St. Louis and Montreal flights
Browse other St. Louis and Montreal flight options. Last updated on May 17, 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 May 17, 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 May 17, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$212 | Average$634 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$318 | Average$639 | FlexibilityNo cancel fee | On-time67% | |
| Cheapest$333 | Average$765 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$348 | Average$650 | FlexibilityNo cancel fee | On-time71% |