$229+ 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 8/1. Fares are subject to change and may not be available on all flights or dates of travel.
STL — YMQ
Jul 29 — Aug 51
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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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 June 29, 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 29, 2026.
This American Airlines deal was found by Cheapflights users on 6/25. 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 10/68:05 pm
STL
- YUL
1 stop14h 15m
American Airlines
Tue 10/1312:30 pm
YUL
- STL
1 stop8h 38m
American Airlines
Deal found 6/25![American Airlines logo]()
$538
This Kiwi.com deal was found by Cheapflights users on 6/26. 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 7/314:57 pm
STL
- YUL
2 stops24h 18m
Multiple Airlines
Fri 8/76:51 pm
YUL
- STL
1 stop18h 05m
Multiple Airlines
Deal found 6/26![Multiple Airlines logo]()
$543
This Gotogate deal was found by Cheapflights users on 6/25. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/1112:10 pm
STL
- YUL
Nonstop2h 32m
Air Canada
Mon 7/134:55 pm
YUL
- STL
Nonstop2h 47m
Air Canada
Deal found 6/25![Air Canada logo]()
$547
This Kiwi.com deal was found by Cheapflights users on 6/24. 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.
Wed 7/224:57 pm
STL
- YUL
2 stops24h 18m
Multiple Airlines
Wed 7/297:00 am
YUL
- STL
1 stop11h 53m
Multiple Airlines
Deal found 6/24![Multiple Airlines logo]()
$555
This American Airlines deal was found by Cheapflights users on 6/28. 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 8/186:00 am
STL
- YUL
1 stop9h 50m
American Airlines
Fri 8/215:34 pm
YUL
- STL
1 stop15h 50m
American Airlines
Deal found 6/28![American Airlines logo]()
$560
This Kiwi.com deal was found by Cheapflights users on 6/25. 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 8/216:17 pm
STL
- YUL
2 stops18h 51m
Multiple Airlines
Wed 8/266:51 pm
YUL
- STL
1 stop5h 30m
Multiple Airlines
Deal found 6/25![Multiple Airlines logo]()
$561
This Kiwi.com deal was found by Cheapflights users on 6/25. 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 8/206:17 pm
STL
- YUL
2 stops24h 01m
Multiple Airlines
Tue 8/257:44 pm
YUL
- STL
1 stop17h 03m
Multiple Airlines
Deal found 6/25![Multiple Airlines logo]()
$569
This American Airlines deal was found by Cheapflights users on 6/25. 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.
Sat 8/18:06 pm
STL
- YUL
1 stop14h 37m
American Airlines
Fri 8/145:34 pm
YUL
- STL
1 stop15h 50m
American Airlines
Deal found 6/25![American Airlines logo]()
$571
This Kiwi.com deal was found by Cheapflights users on 6/25. 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 8/216:17 pm
STL
- YUL
2 stops18h 51m
Multiple Airlines
Tue 8/257:44 pm
YUL
- STL
1 stop17h 03m
Multiple Airlines
Deal found 6/25![Multiple Airlines logo]()
$572
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 29, 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 29, 2026.
This American Airlines deal was found by Cheapflights users on 6/28. 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 7/218:41 pm
STL
- YUL
1 stop19h 06m
American Airlines
Fri 7/247:51 am
YUL
- STL
1 stop10h 11m
American Airlines
Deal found 6/28![American Airlines logo]()
$605
This Delta deal was found by Cheapflights users on 6/27. 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 11/62:00 pm
STL
- YUL
1 stop8h 27m
Delta
Mon 11/99:28 am
YUL
- STL
1 stop9h 30m
Delta
Deal found 6/27![Delta logo]()
$617
This United deal was found by Cheapflights users on 6/26. 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.
Thu 10/17:30 am
STL
- YUL
1 stop7h 40m
Multiple Airlines
Thu 10/89:10 am
YUL
- STL
1 stop5h 50m
Multiple Airlines
Deal found 6/26![Multiple Airlines logo]()
$640
This United Airlines deal was found by Cheapflights users on 6/25. 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.
Tue 7/215:59 pm
STL
- YUL
1 stop17h 01m
United Airlines
Fri 7/246:30 pm
YUL
- STL
1 stop15h 09m
United Airlines
Deal found 6/25![United Airlines logo]()
$641
This Air Canada deal was found by Cheapflights users on 6/28. 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 7/2112:10 pm
STL
- YUL
Nonstop2h 32m
Air Canada
Fri 7/244:55 pm
YUL
- STL
Nonstop2h 47m
Air Canada
Deal found 6/28![Air Canada logo]()
$647
This American Airlines deal was found by Cheapflights users on 6/28. 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 8/213:25 pm
STL
- YUL
1 stop6h 28m
American Airlines
Mon 8/245:34 pm
YUL
- STL
1 stop15h 50m
American Airlines
Deal found 6/28![American Airlines logo]()
$636
This United deal was found by Cheapflights users on 6/28. 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.
Thu 8/137:00 am
STL
- YUL
1 stop5h 09m
Multiple Airlines
Tue 8/184:55 pm
YUL
- STL
Nonstop2h 47m
Multiple Airlines
Deal found 6/28![Multiple Airlines logo]()
$657
This United Airlines deal was found by Cheapflights users on 6/28. 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 7/191:13 pm
STL
- YUL
1 stop7h 13m
United Airlines
Thu 7/236:00 am
YUL
- STL
1 stop6h 41m
United Airlines
Deal found 6/28![United Airlines logo]()
$672
This United deal was found by Cheapflights users on 6/29. 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 8/258:40 am
STL
- YUL
1 stop5h 00m
Multiple Airlines
Fri 8/284:55 pm
YUL
- STL
Nonstop2h 47m
Multiple Airlines
Deal found 6/29![Multiple Airlines logo]()
$657
This United Airlines deal was found by Cheapflights users on 6/26. 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 7/126:01 am
STL
- YUL
1 stop6h 08m
United Airlines
Sat 7/186:10 am
YUL
- STL
1 stop7h 01m
United Airlines
Deal found 6/26![United Airlines logo]()
$672
This United deal was found by Cheapflights users on 6/28. 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 7/216:01 am
STL
- YUL
1 stop9h 09m
Multiple Airlines
Fri 7/244:55 pm
YUL
- STL
Nonstop2h 47m
Multiple Airlines
Deal found 6/28![Multiple Airlines logo]()
$657
This United deal was found by Cheapflights users on 6/24. 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 United is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/117:20 am
STL
- YUL
1 stop9h 10m
Multiple Airlines
Tue 7/144:55 pm
YUL
- STL
Nonstop2h 47m
Multiple Airlines
Deal found 6/24![Multiple Airlines logo]()
$657
Last-minute flights from St. Louis to MontrealDiscover last-minute flight deals from St. Louis to Montreal. Data last updated June 29, 2026 and is based on user searches.
Discover last-minute flight deals from St. Louis to Montreal. Data last updated June 29, 2026 and is based on user searches.
This Gotogate deal was found by Cheapflights users on 6/25. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/1112:10 pm
STL
- YUL
Nonstop2h 32m
Air Canada
Mon 7/134:55 pm
YUL
- STL
Nonstop2h 47m
Air Canada
Deal found 6/25![Air Canada logo]()
$547
This Kiwi.com deal was found by Cheapflights users on 6/24. 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.
Mon 7/204:57 pm
STL
- YUL
2 stops24h 18m
Multiple Airlines
Mon 7/276:47 pm
YUL
- STL
1 stop14h 32m
Multiple Airlines
Deal found 6/24![Multiple Airlines logo]()
$600
This American Airlines deal was found by Cheapflights users on 6/28. 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 7/218:41 pm
STL
- YUL
1 stop19h 06m
American Airlines
Fri 7/247:51 am
YUL
- STL
1 stop10h 11m
American Airlines
Deal found 6/28![American Airlines logo]()
$605
This American Airlines deal was found by Cheapflights users on 6/26. 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 7/218:41 pm
STL
- YUL
1 stop19h 06m
American Airlines
Sat 7/257:51 am
YUL
- STL
1 stop10h 11m
American Airlines
Deal found 6/26![American Airlines logo]()
$622
This Kiwi.com deal was found by Cheapflights users on 6/24. 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.
Wed 7/224:57 pm
STL
- YUL
2 stops24h 18m
Multiple Airlines
Wed 7/297:00 am
YUL
- STL
1 stop11h 53m
Multiple Airlines
Deal found 6/24![Multiple Airlines logo]()
$555
This American Airlines deal was found by Cheapflights users on 6/24. 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.
Wed 7/226:55 am
STL
- YUL
1 stop8h 52m
American Airlines
Wed 7/2912:30 pm
YUL
- STL
1 stop12h 46m
American Airlines
Deal found 6/24![American Airlines logo]()
$618
This Kiwi.com deal was found by Cheapflights users on 6/24. 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 7/236:34 pm
STL
- YUL
2 stops22h 41m
Multiple Airlines
Thu 7/306:47 pm
YUL
- STL
1 stop6h 06m
Multiple Airlines
Deal found 6/24![Multiple Airlines logo]()
$610
This Kiwi.com deal was found by Cheapflights users on 6/25. 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.
Sun 7/266:34 pm
STL
- YUL
2 stops22h 41m
Multiple Airlines
Fri 7/316:47 pm
YUL
- STL
1 stop15h 10m
Multiple Airlines
Deal found 6/25![Multiple Airlines logo]()
$620
This Kiwi.com deal was found by Cheapflights users on 6/26. 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 7/314:57 pm
STL
- YUL
2 stops24h 18m
Multiple Airlines
Fri 8/76:51 pm
YUL
- STL
1 stop18h 05m
Multiple Airlines
Deal found 6/26![Multiple Airlines logo]()
$543
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 29, 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 29, 2026.
This Kiwi.com deal was found by Cheapflights users on 6/28. 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 8/14:57 pm
STL
- YUL
3 stops18h 13m
Multiple Airlines
Deal found 6/28![Multiple Airlines logo]()
$229
This Kiwi.com deal was found by Cheapflights users on 6/25. 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.
Wed 7/84:57 pm
STL
- YUL
2 stops24h 18m
Multiple Airlines
Deal found 6/25![Multiple Airlines logo]()
$230
This American Airlines deal was found by Cheapflights users on 6/28. 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 6/28![American Airlines logo]()
$241
This Kiwi.com deal was found by Cheapflights users on 6/26. 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 10/210:35 am
STL
- YUL
3 stops36h 50m
Multiple Airlines
Deal found 6/26![Multiple Airlines logo]()
$255
This Delta deal was found by Cheapflights users on 6/28. 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 6/28![Delta logo]()
$274
This Delta deal was found by Cheapflights users on 6/26. 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 10/27:05 am
STL
- YUL
1 stop9h 33m
Delta
Deal found 6/26![Delta logo]()
$292
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 29, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $538 (American Airlines) |
One-way from | $229 (Kiwi.com) |
Popular in | March |
Cheapest in | February |
Average price | $669 |
Good round-trip deal | $665 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 June 29, 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
8:41 pm-4:47 pm
1 stop19h 06m
Montreal Pierre Elliott Trudeau Intl
Fri 7/24
7:51 am-5:02 pm
1 stop10h 11m
$605
St. LouisMontreal
STL - YUL
STLYUL
Lambert-St Louis
Fri 11/6
2:00 pm-11:27 pm
1 stop8h 27m
Montreal Pierre Elliott Trudeau Intl
Mon 11/9
9:28 am-5:58 pm
1 stop9h 30m
$617
St. LouisMontreal
STL - YUL
STLYUL
Lambert-St Louis
Fri 8/21
3:25 pm-10:53 pm
1 stop6h 28m
Montreal Pierre Elliott Trudeau Intl
Mon 8/24
5:34 pm-8:24 am
1 stop15h 50m
$636
St. LouisMontreal
STL - YUL
STLYUL
Lambert-St Louis
Thu 10/1
7:30 am-4:10 pm
1 stop7h 40m
Montreal Pierre Elliott Trudeau Intl
Thu 10/8
9:10 am-2:00 pm
1 stop5h 50m
$640
St. LouisMontreal
STL - YUL
STLYUL
Lambert-St Louis
Tue 7/21
5:59 pm-12:00 pm
1 stop17h 01m
Montreal Pierre Elliott Trudeau Intl
Fri 7/24
6:30 pm-8:39 am
1 stop15h 09m
$641
Quickest round-trip
St. LouisMontreal
STL - YUL
STLYUL
Lambert-St Louis
Tue 7/21
12:10 pm-3:42 pm
Nonstop2h 32m
Montreal Pierre Elliott Trudeau Intl
Fri 7/24
4:55 pm-6:42 pm
Nonstop2h 47m
$647
St. LouisMontreal
STL - YUL
STLYUL
Lambert-St Louis
Thu 8/13
7:00 am-1:09 pm
1 stop5h 09m
Montreal Pierre Elliott Trudeau Intl
Tue 8/18
4:55 pm-6:42 pm
Nonstop2h 47m
$657
St. LouisMontreal
STL - YUL
STLYUL
Lambert-St Louis
Tue 8/25
8:40 am-2:40 pm
1 stop5h 00m
Montreal Pierre Elliott Trudeau Intl
Fri 8/28
4:55 pm-6:42 pm
Nonstop2h 47m
$657
St. LouisMontreal
STL - YUL
STLYUL
Lambert-St Louis
Tue 7/21
6:01 am-4:10 pm
1 stop9h 09m
Montreal Pierre Elliott Trudeau Intl
Fri 7/24
4:55 pm-6:42 pm
Nonstop2h 47m
$657
St. LouisMontreal
STL - YUL
STLYUL
Lambert-St Louis
Sat 7/11
7:20 am-5:30 pm
1 stop9h 10m
Montreal Pierre Elliott Trudeau Intl
Tue 7/14
4:55 pm-6:42 pm
Nonstop2h 47m
$657
Showing 1-10 of 17 resultsSorted by cheapest first
Compare providers for flights from St. Louis to Montreal
Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from St. Louis to Montreal in 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 29, 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.
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 29, 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.
Comfort
7.8
Overall
7.8
Entertainment
7.8
Food
7.2
Boarding
8.1
Crew
8.5
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Comfort
7.8
Overall
7.8
Entertainment
7.8
Food
7.2
Boarding
8.1
Crew
8.5
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Comfort
7.8
Overall
7.8
Entertainment
7.8
Food
7.2
Boarding
8.1
Crew
8.5
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Comfort
7.8
Overall
7.8
Entertainment
7.8
Food
7.2
Boarding
8.1
Crew
8.5
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Related info for your journey
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| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$257 | Average$636 | FlexibilityNo cancel fee | On-time67% | |
| Cheapest$296 | Average$743 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$348 | Average$650 | FlexibilityNo cancel fee | On-time71% |