$210+ Cheap flights from St. Louis (STL) to Montreal (YMQ)
This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 11/25. Fares are subject to change and may not be available on all flights or dates of travel.
STL — YMQ
Nov 16 — Nov 231
Round-trip
1 adult, Economy
We work with more than 300 partners to bring you better travel deals
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
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 October 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 October 17, 2026.
This American Airlines deal was found by Cheapflights users on 10/12. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/108:15 pm -
1 stop14h 10m
Tue 11/1712:10 pm -
1 stop12h 49m
Deal found 10/12![American Airlines logo]()
$460
This American Airlines deal was found by Cheapflights users on 10/12. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/267:16 am -
2 stops28h 07m
Thu 12/312:08 pm -
1 stop8h 50m
Deal found 10/12![American Airlines logo]()
$469
This American Airlines deal was found by Cheapflights users on 10/13. 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.
Mon 11/98:15 pm -
1 stop14h 10m
Fri 11/1312:10 pm -
1 stop12h 49m
Deal found 10/13![American Airlines logo]()
$507
This Mytrip deal was found by Cheapflights users on 10/14. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/116:34 pm -
3 stops26h 36m
Wed 11/184:40 pm -
3 stops31h 36m
Deal found 10/14![Multiple Airlines logo]()
$528
This Mytrip deal was found by Cheapflights users on 10/13. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/26:44 pm -
3 stops23h 21m
Fri 11/65:25 pm -
3 stops26h 49m
Deal found 10/13![Multiple Airlines logo]()
$534
This Mytrip deal was found by Cheapflights users on 10/13. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/96:34 pm -
3 stops23h 31m
Fri 11/134:40 pm -
3 stops31h 36m
Deal found 10/13![Multiple Airlines logo]()
$540
This American Airlines deal was found by Cheapflights users on 10/12. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/118:15 pm -
1 stop14h 10m
Wed 11/181:04 pm -
2 stops11h 55m
Deal found 10/12![American Airlines logo]()
$544
This American Airlines deal was found by Cheapflights users on 10/16. 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 11/145:16 pm -
1 stop17h 09m
Sat 11/2112:10 pm -
1 stop11h 04m
Deal found 10/16![American Airlines logo]()
$571
This American Airlines deal was found by Cheapflights users on 10/14. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/108:15 pm -
1 stop14h 10m
Mon 11/1612:10 pm -
1 stop12h 49m
Deal found 10/14![American Airlines logo]()
$577
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 October 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 October 17, 2026.
This American Airlines deal was found by Cheapflights users on 10/12. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/267:16 am -
2 stops28h 07m
Thu 12/312:08 pm -
1 stop8h 50m
Deal found 10/12![American Airlines logo]()
$469
This Delta deal was found by Cheapflights users on 10/17. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/17:03 am -
2 stops10h 50m
Tue 12/89:40 am -
2 stops11h 52m
Deal found 10/17![Delta logo]()
$802
This United Airlines deal was found by Cheapflights users on 10/13. 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.
Mon 12/285:20 am -
1 stop10h 47m
Wed 12/309:25 am -
1 stop9h 53m
Deal found 10/13![United Airlines logo]()
$823
This United deal was found by Cheapflights users on 10/13. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/55:00 am -
1 stop11h 07m
Sun 11/89:10 am -
1 stop7h 16m
Deal found 10/13![Multiple Airlines logo]()
$888
This American Airlines deal was found by Cheapflights users on 10/12. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/158:15 pm -
1 stop14h 10m
Thu 11/1912:10 pm -
1 stop12h 51m
Deal found 10/12![American Airlines logo]()
$588
This American Airlines deal was found by Cheapflights users on 10/17. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/108:15 pm -
1 stop14h 10m
Mon 11/1612:10 pm -
1 stop12h 49m
Deal found 10/17![American Airlines logo]()
$755
This Delta deal was found by Cheapflights users on 10/12. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/117:13 am -
2 stops10h 45m
Wed 11/1812:50 pm -
2 stops12h 06m
Deal found 10/12![Delta logo]()
$836
This United deal was found by Cheapflights users on 10/13. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/266:00 am -
1 stop10h 07m
Sat 11/2811:10 am -
1 stop5h 16m
Deal found 10/13![Multiple Airlines logo]()
$888
This American Airlines deal was found by Cheapflights users on 10/15. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/128:15 pm -
1 stop14h 10m
Thu 11/1912:10 pm -
1 stop8h 54m
Deal found 10/15![American Airlines logo]()
$765
This Delta deal was found by Cheapflights users on 10/12. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/156:00 am -
2 stops11h 58m
Thu 11/1912:50 pm -
2 stops12h 06m
Deal found 10/12![Delta logo]()
$929
Last-minute flights from St. Louis to MontrealDiscover last-minute flight deals from St. Louis to Montreal. Data last updated October 17, 2026 and is based on user searches.
Discover last-minute flight deals from St. Louis to Montreal. Data last updated October 17, 2026 and is based on user searches.
This Mytrip deal was found by Cheapflights users on 10/13. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/26:44 pm -
3 stops23h 21m
Fri 11/65:25 pm -
3 stops26h 49m
Deal found 10/13![Multiple Airlines logo]()
$534
This American Airlines deal was found by Cheapflights users on 10/13. 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.
Mon 11/98:15 pm -
1 stop14h 10m
Fri 11/1312:10 pm -
1 stop12h 49m
Deal found 10/13![American Airlines logo]()
$507
This Mytrip deal was found by Cheapflights users on 10/13. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/96:34 pm -
3 stops23h 31m
Fri 11/134:40 pm -
3 stops31h 36m
Deal found 10/13![Multiple Airlines logo]()
$540
This American Airlines deal was found by Cheapflights users on 10/12. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/108:15 pm -
1 stop14h 10m
Tue 11/1712:10 pm -
1 stop12h 49m
Deal found 10/12![American Airlines logo]()
$460
This American Airlines deal was found by Cheapflights users on 10/14. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/108:15 pm -
1 stop14h 10m
Mon 11/1612:10 pm -
1 stop12h 49m
Deal found 10/14![American Airlines logo]()
$577
This Mytrip deal was found by Cheapflights users on 10/14. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/116:34 pm -
3 stops26h 36m
Wed 11/184:40 pm -
3 stops31h 36m
Deal found 10/14![Multiple Airlines logo]()
$528
This American Airlines deal was found by Cheapflights users on 10/12. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/118:15 pm -
1 stop14h 10m
Wed 11/181:04 pm -
2 stops11h 55m
Deal found 10/12![American Airlines logo]()
$544
This American Airlines deal was found by Cheapflights users on 10/16. 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 11/145:16 pm -
1 stop17h 09m
Sat 11/2112:10 pm -
1 stop11h 04m
Deal found 10/16![American Airlines logo]()
$571
This American Airlines deal was found by Cheapflights users on 10/12. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/267:16 am -
2 stops28h 07m
Thu 12/312:08 pm -
1 stop8h 50m
Deal found 10/12![American Airlines logo]()
$469
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 October 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 October 17, 2026.
This Kiwi.com deal was found by Cheapflights users on 10/14. 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.
Wed 11/256:35 pm -
3 stops44h 25m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/14![Multiple Airlines logo]()
$210
This American Airlines deal was found by Cheapflights users on 10/14. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/248:12 pm -
1 stop14h 14m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/14![American Airlines logo]()
$225
This Kiwi.com deal was found by Cheapflights users on 10/13. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/292:00 pm -
3 stops31h 10m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/13![Multiple Airlines logo]()
$284
This Kiwi.com deal was found by Cheapflights users on 10/14. 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.
Tue 11/249:09 am -
3 stops29h 51m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/14![Multiple Airlines logo]()
$285
This Kiwi.com deal was found by Cheapflights users on 10/14. 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.
Wed 10/282:00 pm -
3 stops31h 10m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/14![Multiple Airlines logo]()
$316
This Kiwi.com deal was found by Cheapflights users on 10/13. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/262:00 pm -
3 stops31h 10m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/13![Multiple Airlines logo]()
$360
This Kiwi.com deal was found by Cheapflights users on 10/14. 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.
Sat 11/285:15 pm -
3 stops48h 28m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/14![Multiple Airlines logo]()
$398
This Thrive Travel deal was found by Cheapflights users on 10/14. 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 Thrive Travel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/273:18 pm -
1 stop5h 12m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/14![Qatar Airways logo]()
$402
This Mytrip deal was found by Cheapflights users on 10/14. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/234:30 pm -
3 stops24h 42m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/14![Multiple Airlines logo]()
$404
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 October 17, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $460 (American Airlines) |
One-way from | $210 (Kiwi.com) |
Popular in | March |
Cheapest in | February |
Average price | $628 |
Good round-trip deal | $690 or less |
Good one-way deal | $319 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 October 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
St. LouisMontreal
STL Lambert-St Louis - YUL Montreal Pierre Elliott Trudeau Intl
STLYUL
Lambert-St Louis
Mon 10/26
2:00 pm-10:10 pm
3 stops31h 10m
Montreal Pierre Elliott Trudeau Intl
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$360
St. LouisMontreal
STL Lambert-St Louis - YUL Montreal Pierre Elliott Trudeau Intl
STLYUL
Lambert-St Louis
Fri 10/23
7:29 am-4:52 pm
1 stop8h 23m
Montreal Pierre Elliott Trudeau Intl
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$455
St. LouisMontreal
STL Lambert-St Louis - YUL Montreal Pierre Elliott Trudeau Intl
STLYUL
Lambert-St Louis
Wed 10/28
6:47 am-6:58 pm
2 stops11h 11m
Montreal Pierre Elliott Trudeau Intl
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$469
St. LouisMontreal
STL Lambert-St Louis - YUL Montreal Pierre Elliott Trudeau Intl
STLYUL
Lambert-St Louis
Thu 11/26
7:16 am-12:23 pm
2 stops28h 07m
Montreal Pierre Elliott Trudeau Intl
Thu 12/3
12:08 pm-7:58 pm
1 stop8h 50m
$469
St. LouisMontreal
STL Lambert-St Louis - YUL Montreal Pierre Elliott Trudeau Intl
STLYUL
Lambert-St Louis
Thu 10/29
7:00 am-11:25 pm
2 stops15h 25m
Montreal Pierre Elliott Trudeau Intl
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$476
St. LouisMontreal
STL Lambert-St Louis - YUL Montreal Pierre Elliott Trudeau Intl
STLYUL
Lambert-St Louis
Thu 10/29
6:09 am-5:00 pm
1 stop9h 51m
Montreal Pierre Elliott Trudeau Intl
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$490
St. LouisMontreal
STL Lambert-St Louis - YUL Montreal Pierre Elliott Trudeau Intl
STLYUL
Lambert-St Louis
Fri 10/23
6:47 am-6:58 pm
2 stops11h 11m
Montreal Pierre Elliott Trudeau Intl
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$504
Quickest round-trip
St. LouisMontreal
STL Lambert-St Louis - YUL Montreal Pierre Elliott Trudeau Intl
STLYUL
Lambert-St Louis
Fri 10/23
8:30 am-5:17 pm
2 stops7h 47m
Montreal Pierre Elliott Trudeau Intl
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$535
St. LouisMontreal
STL Lambert-St Louis - YUL Montreal Pierre Elliott Trudeau Intl
STLYUL
Lambert-St Louis
Sun 11/15
8:15 pm-11:25 am
1 stop14h 10m
Montreal Pierre Elliott Trudeau Intl
Thu 11/19
12:10 pm-12:01 am
1 stop12h 51m
$588
St. LouisMontreal
STL Lambert-St Louis - YUL Montreal Pierre Elliott Trudeau Intl
STLYUL
Lambert-St Louis
Tue 11/10
8:15 pm-11:25 am
1 stop14h 10m
Montreal Pierre Elliott Trudeau Intl
Mon 11/16
12:10 pm-11:59 pm
1 stop12h 49m
$755
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 October.
| 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 $457). Flying from St. Louis to Montreal in November is currently the most expensive (average of $829). 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 October 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 October 17, 2026.
The most flights from STL to YMQ are scheduled on a Monday (3 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (3 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 $594 and $707 in November.The cheapest round-trip price found within the last 5 days was $460 on American Airlines (Nov 10-Nov 17).
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 October 17, 2026.
Read through reviews of airlines operating flights from St. Louis to Montreal, such as Delta,United Airlines, andAir Canada. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Food
7.2
Comfort
7.8
Overall
7.8
Boarding
8.1
Crew
8.5
Entertainment
7.8
Reviews
1 / 20
6.0
GoodEllen,Oct 2026
GRR - ATL
Food
7.2
Comfort
7.8
Overall
7.8
Boarding
8.1
Crew
8.5
Entertainment
7.8
Reviews
1 / 20
6.0
GoodEllen,Oct 2026
GRR - ATL
Food
7.2
Comfort
7.8
Overall
7.8
Boarding
8.1
Crew
8.5
Entertainment
7.8
Reviews
1 / 20
6.0
GoodEllen,Oct 2026
GRR - ATL
Food
7.2
Comfort
7.8
Overall
7.8
Boarding
8.1
Crew
8.5
Entertainment
7.8
Reviews
1 / 20
6.0
GoodEllen,Oct 2026
GRR - ATL
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.
Browse thousands of different options on Cheapflights for your next trip
Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.
Alternative routes
Complete your trip
Flights by cabin class
Montreal flight routes
Other flight options
Other flights from St. Louis
Popular flights
Alternative routes for St. Louis to Montreal
See prices for flight routes from nearby airports that may be better suited for you.
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 October 17, 2026.
St. Louis and Montreal flights
Browse other St. Louis and Montreal flight options. Last updated on October 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 October 17, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
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 October 17, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$257 | Average$667 | FlexibilityNo cancel fee | On-time67% | |
| Cheapest$296 | Average$743 | FlexibilityNo cancel fee | On-time69% |