$207+ 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 10/28. Fares are subject to change and may not be available on all flights or dates of travel.
STL — YMQ
Sep 22 — Sep 291
Round-trip
1 adult, Economy
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Find cheap flights from St. Louis to Montreal with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from St. Louis to Montreal
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Best
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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 August 23, 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 August 23, 2026.
This American Airlines deal was found by Cheapflights users on 8/18. 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 -
1 stop8h 23m
Wed 10/215:34 pm -
1 stop18h 16m
Deal found 8/18![American Airlines logo]()
$480
This American Airlines deal was found by Cheapflights users on 8/20. 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 10/145:00 am -
1 stop10h 52m
Wed 10/2112:30 pm -
1 stop9h 27m
Deal found 8/20![American Airlines logo]()
$483
This American Airlines deal was found by Cheapflights users on 8/19. 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 9/97:26 am -
2 stops13h 16m
Tue 9/155:34 pm -
1 stop17h 44m
Deal found 8/19![American Airlines logo]()
$490
This American Airlines deal was found by Cheapflights users on 8/19. 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 9/187:21 am -
1 stop8h 32m
Fri 9/255:34 pm -
1 stop17h 44m
Deal found 8/19![American Airlines logo]()
$503
This American Airlines deal was found by Cheapflights users on 8/23. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/105:23 pm -
1 stop17h 21m
Wed 10/145:34 pm -
1 stop18h 16m
Deal found 8/23![American Airlines logo]()
$513
This American Airlines deal was found by Cheapflights users on 8/22. 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.
Fri 10/25:00 am -
1 stop10h 53m
Tue 10/65:34 pm -
1 stop18h 16m
Deal found 8/22![American Airlines logo]()
$531
This American Airlines deal was found by Cheapflights users on 8/22. 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 -
1 stop8h 23m
Wed 10/145:34 pm -
1 stop18h 16m
Deal found 8/22![American Airlines logo]()
$539
This American Airlines deal was found by Cheapflights users on 8/20. 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 9/307:21 am -
1 stop8h 32m
Wed 10/712:30 pm -
1 stop9h 27m
Deal found 8/20![American Airlines logo]()
$546
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 August 23, 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 August 23, 2026.
This American Airlines deal was found by Cheapflights users on 8/22. 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.
Sat 9/195:18 pm -
1 stop17h 26m
Sat 9/2612:32 pm -
1 stop12h 55m
Deal found 8/22![American Airlines logo]()
$592
This Delta deal was found by Cheapflights users on 8/22. 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.
Thu 9/176:40 am -
2 stops11h 13m
Wed 9/239:30 am -
2 stops11h 28m
Deal found 8/22![Delta logo]()
$681
This FlightHub deal was found by Cheapflights users on 8/22. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/198:00 am -
2 stops22h 05m
Sat 9/268:00 pm -
2 stops20h 54m
Deal found 8/22![WestJet logo]()
$725
This United deal was found by Cheapflights users on 8/20. 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 10/146:00 am -
1 stop10h 30m
Wed 10/214:55 pm -
Nonstop2h 46m
Deal found 8/20![Multiple Airlines logo]()
$745
This United Airlines deal was found by Cheapflights users on 8/19. 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 12/236:58 pm -
1 stop18h 02m
Sat 1/29:25 am -
1 stop8h 43m
Deal found 8/19![United Airlines logo]()
$759
This American Airlines deal was found by Cheapflights users on 8/18. 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 9/164:37 pm -
1 stop16h 12m
Sun 9/205:34 pm -
1 stop17h 44m
Deal found 8/18![American Airlines logo]()
$622
This American Airlines deal was found by Cheapflights users on 8/23. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/255:00 am -
1 stop10h 52m
Sat 10/311:06 pm -
2 stops12h 13m
Deal found 8/23![American Airlines logo]()
$638
This Delta deal was found by Cheapflights users on 8/19. 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 9/166:40 am -
2 stops11h 13m
Wed 9/239:30 am -
2 stops11h 28m
Deal found 8/19![Delta logo]()
$704
This United deal was found by Cheapflights users on 8/22. 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.
Thu 10/158:00 am -
1 stop10h 01m
Tue 10/204:55 pm -
Nonstop2h 46m
Deal found 8/22![Multiple Airlines logo]()
$749
This United Airlines deal was found by Cheapflights users on 8/19. 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 9/68:40 am -
1 stop10h 05m
Thu 9/108:40 am -
1 stop12h 20m
Deal found 8/19![United Airlines logo]()
$765
This United deal was found by Cheapflights users on 8/22. 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.
Mon 9/218:00 am -
1 stop12h 26m
Mon 9/289:10 am -
1 stop5h 50m
Deal found 8/22![Multiple Airlines logo]()
$762
Last-minute flights from St. Louis to MontrealDiscover last-minute flight deals from St. Louis to Montreal. Data last updated August 23, 2026 and is based on user searches.
Discover last-minute flight deals from St. Louis to Montreal. Data last updated August 23, 2026 and is based on user searches.
This American Airlines deal was found by Cheapflights users on 8/19. 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 9/97:26 am -
2 stops13h 16m
Tue 9/155:34 pm -
1 stop17h 44m
Deal found 8/19![American Airlines logo]()
$490
This American Airlines deal was found by Cheapflights users on 8/19. 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 9/114:37 pm -
1 stop16h 12m
Tue 9/155:34 pm -
1 stop17h 44m
Deal found 8/19![American Airlines logo]()
$551
This Kiwi.com deal was found by Cheapflights users on 8/19. 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 9/112:29 pm -
2 stops15h 36m
Tue 9/156:00 am -
1 stop4h 29m
Deal found 8/19![Multiple Airlines logo]()
$574
This Kiwi.com deal was found by Cheapflights users on 8/21. 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.
Mon 9/142:29 pm -
2 stops15h 36m
Wed 9/167:00 am -
1 stop7h 23m
Deal found 8/21![Multiple Airlines logo]()
$566
This Kiwi.com deal was found by Cheapflights users on 8/22. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/168:10 pm -
2 stops26h 35m
Wed 9/232:25 pm -
1 stop6h 41m
Deal found 8/22![Multiple Airlines logo]()
$554
This American Airlines deal was found by Cheapflights users on 8/22. 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 9/165:00 am -
1 stop10h 53m
Wed 9/235:34 pm -
1 stop17h 44m
Deal found 8/22![American Airlines logo]()
$556
This Delta deal was found by Cheapflights users on 8/19. 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 9/167:00 am -
1 stop10h 53m
Wed 9/239:30 am -
1 stop11h 36m
Deal found 8/19![Delta logo]()
$595
This American Airlines deal was found by Cheapflights users on 8/18. 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 9/177:27 am -
1 stop8h 26m
Sun 9/205:34 pm -
1 stop17h 44m
Deal found 8/18![American Airlines logo]()
$568
This American Airlines deal was found by Cheapflights users on 8/19. 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 9/187:21 am -
1 stop8h 32m
Fri 9/255:34 pm -
1 stop17h 44m
Deal found 8/19![American Airlines logo]()
$503
This American Airlines deal was found by Cheapflights users on 8/20. 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 9/307:21 am -
1 stop8h 32m
Wed 10/712:30 pm -
1 stop9h 27m
Deal found 8/20![American Airlines logo]()
$546
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 August 23, 2026.
Search for one-way flight options from St. Louis to Montreal. Find affordable one-way fares based on user searches. Data last updated August 23, 2026.
This American Airlines deal was found by Cheapflights users on 8/18. 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 10/287:29 am -
1 stop8h 23m
Deal found 8/18![American Airlines logo]()
$207
This American Airlines deal was found by Cheapflights users on 8/19. 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 -
1 stop8h 23m
Deal found 8/19![American Airlines logo]()
$211
This American Airlines deal was found by Cheapflights users on 8/18. 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 10/195:27 pm -
1 stop17h 17m
Deal found 8/18![American Airlines logo]()
$216
This American Airlines deal was found by Cheapflights users on 8/21. 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.
Thu 10/225:00 am -
1 stop10h 52m
Deal found 8/21![American Airlines logo]()
$225
This American Airlines deal was found by Cheapflights users on 8/20. 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 10/55:27 pm -
1 stop17h 17m
Deal found 8/20![American Airlines logo]()
$228
This Kiwi.com deal was found by Cheapflights users on 8/20. 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 9/72:10 pm -
3 stops30h 02m
Deal found 8/20![Multiple Airlines logo]()
$234
This Kiwi.com deal was found by Cheapflights users on 8/20. 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 10/52:29 pm -
3 stops32h 56m
Deal found 8/20![Multiple Airlines logo]()
$242
This Kiwi.com deal was found by Cheapflights users on 8/21. 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.
Thu 10/152:00 pm -
3 stops30h 12m
Deal found 8/21![Multiple Airlines logo]()
$253
This Kiwi.com deal was found by Cheapflights users on 8/18. 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 10/196:35 pm -
3 stops29h 02m
Deal found 8/18![Multiple Airlines logo]()
$254
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 August 23, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $480 (American Airlines) |
One-way from | $207 (American Airlines) |
Popular in | March |
Cheapest in | February |
Average price | $569 |
Good round-trip deal | $901 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 7,457,451 searches. Data last updated August 23, 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 Lambert-St Louis - YUL Montreal Pierre Elliott Trudeau Intl
STLYUL
Lambert-St Louis
Sat 9/19
5:18 pm-11:44 am
1 stop17h 26m
Montreal Pierre Elliott Trudeau Intl
Sat 9/26
12:32 pm-12:27 am
1 stop12h 55m
$592
St. LouisMontreal
STL Lambert-St Louis - YUL Montreal Pierre Elliott Trudeau Intl
STLYUL
Lambert-St Louis
Wed 9/16
4:37 pm-9:49 am
1 stop16h 12m
Montreal Pierre Elliott Trudeau Intl
Sun 9/20
5:34 pm-10:18 am
1 stop17h 44m
$622
St. LouisMontreal
STL Lambert-St Louis - YUL Montreal Pierre Elliott Trudeau Intl
STLYUL
Lambert-St Louis
Sun 10/25
5:00 am-4:52 pm
1 stop10h 52m
Montreal Pierre Elliott Trudeau Intl
Sat 10/31
1:06 pm-12:19 am
2 stops12h 13m
$638
St. LouisMontreal
STL Lambert-St Louis - YUL Montreal Pierre Elliott Trudeau Intl
STLYUL
Lambert-St Louis
Thu 9/17
6:40 am-6:53 pm
2 stops11h 13m
Montreal Pierre Elliott Trudeau Intl
Wed 9/23
9:30 am-7:58 pm
2 stops11h 28m
$681
St. LouisMontreal
STL Lambert-St Louis - YUL Montreal Pierre Elliott Trudeau Intl
STLYUL
Lambert-St Louis
Wed 9/16
6:40 am-6:53 pm
2 stops11h 13m
Montreal Pierre Elliott Trudeau Intl
Wed 9/23
9:30 am-7:58 pm
2 stops11h 28m
$704
St. LouisMontreal
STL Lambert-St Louis - YUL Montreal Pierre Elliott Trudeau Intl
STLYUL
Lambert-St Louis
Sat 9/19
8:00 am-7:05 am
2 stops22h 05m
Montreal Pierre Elliott Trudeau Intl
Sat 9/26
8:00 pm-3:54 pm
2 stops20h 54m
$725
St. LouisMontreal
STL Lambert-St Louis - YUL Montreal Pierre Elliott Trudeau Intl
STLYUL
Lambert-St Louis
Wed 10/14
6:00 am-5:30 pm
1 stop10h 30m
Montreal Pierre Elliott Trudeau Intl
Wed 10/21
4:55 pm-6:41 pm
Nonstop2h 46m
$745
Quickest round-trip
St. LouisMontreal
STL Lambert-St Louis - YUL Montreal Pierre Elliott Trudeau Intl
STLYUL
Lambert-St Louis
Thu 10/15
8:00 am-7:01 pm
1 stop10h 01m
Montreal Pierre Elliott Trudeau Intl
Tue 10/20
4:55 pm-6:41 pm
Nonstop2h 46m
$749
St. LouisMontreal
STL Lambert-St Louis - YUL Montreal Pierre Elliott Trudeau Intl
STLYUL
Lambert-St Louis
Wed 12/23
6:58 pm-2:00 pm
1 stop18h 02m
Montreal Pierre Elliott Trudeau Intl
Sat 1/2
9:25 am-5:08 pm
1 stop8h 43m
$759
St. LouisMontreal
STL Lambert-St Louis - YUL Montreal Pierre Elliott Trudeau Intl
STLYUL
Lambert-St Louis
Mon 9/21
8:00 am-9:26 pm
1 stop12h 26m
Montreal Pierre Elliott Trudeau Intl
Mon 9/28
9:10 am-2:00 pm
1 stop5h 50m
$762
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 August.
| 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 August 23, 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 August 23, 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 $491 and $819 in October.The cheapest round-trip price found within the last 5 days was $480 on American Airlines (Oct 17-Oct 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 August 23, 2026.
Read through reviews of airlines operating flights from St. Louis to Montreal, such as Delta and Air Canada. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Food
7.2
Crew
8.5
Entertainment
7.8
Comfort
7.8
Overall
7.8
Boarding
8.1
Reviews
1 / 20
10.0
ExcellentSalvador,Aug 2026
PHL - DTW
Food
7.2
Crew
8.5
Entertainment
7.8
Comfort
7.8
Overall
7.8
Boarding
8.1
Reviews
1 / 20
10.0
ExcellentSalvador,Aug 2026
PHL - DTW
Food
7.2
Crew
8.5
Entertainment
7.8
Comfort
7.8
Overall
7.8
Boarding
8.1
Reviews
1 / 20
10.0
ExcellentSalvador,Aug 2026
PHL - DTW
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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Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.
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Explore flights to Montreal departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on August 23, 2026.
St. Louis and Montreal flights
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Top 2 airlines flying from St. Louis to Montreal
Discover the top 2 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 7,457,451 searches. Data last updated August 23, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$257 | Average$649 | FlexibilityNo cancel fee | On-time67% | |
| Cheapest$296 | Average$754 | FlexibilityNo cancel fee | On-time69% |