$128+ 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 4/22. Fares are subject to change and may not be available on all flights or dates of travel.
STL — YMQ
Mar 6 — Mar 131
1 adult, Economy
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Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
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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 February 4, 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 February 4, 2026.
This American Airlines deal was found by Cheapflights users on 2/3. 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 4/75:21 pm
STL
- YUL
1 stop17h 23m
American Airlines
Thu 4/912:30 pm
YUL
- STL
1 stop12h 16m
American Airlines
Deal found 2/3![American Airlines logo]()
$342
This American Airlines deal was found by Cheapflights users on 2/4. 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 5/58:03 pm
STL
- YUL
1 stop14h 41m
American Airlines
Sat 5/91:03 pm
YUL
- STL
2 stops11h 53m
American Airlines
Deal found 2/4![American Airlines logo]()
$352
This American Airlines deal was found by Cheapflights users on 2/3. 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 4/175:21 pm
STL
- YUL
1 stop17h 23m
American Airlines
Tue 4/2112:30 pm
YUL
- STL
1 stop12h 16m
American Airlines
Deal found 2/3![American Airlines logo]()
$394
This American Airlines deal was found by Cheapflights users on 2/2. 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 4/175:21 pm
STL
- YUL
1 stop17h 23m
American Airlines
Mon 4/2012:30 pm
YUL
- STL
1 stop10h 47m
American Airlines
Deal found 2/2![American Airlines logo]()
$422
This American Airlines deal was found by Cheapflights users on 2/3. 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 4/212:33 pm
STL
- YUL
1 stop20h 11m
American Airlines
Fri 4/247:29 am
YUL
- STL
1 stop11h 35m
American Airlines
Deal found 2/3![American Airlines logo]()
$455
This American Airlines deal was found by Cheapflights users on 2/2. 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 4/37:05 am
STL
- YUL
1 stop14h 43m
American Airlines
Mon 4/63:45 pm
YUL
- STL
1 stop17h 41m
American Airlines
Deal found 2/2![American Airlines logo]()
$482
This American Airlines deal was found by Cheapflights users on 2/2. 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 5/36:29 am
STL
- YUL
1 stop7h 58m
American Airlines
Sat 5/912:30 pm
YUL
- STL
1 stop12h 26m
American Airlines
Deal found 2/2![American Airlines logo]()
$504
This American Airlines deal was found by Cheapflights users on 2/2. 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 4/175:21 pm
STL
- YUL
1 stop17h 23m
American Airlines
Sun 4/1912:30 pm
YUL
- STL
1 stop5h 11m
American Airlines
Deal found 2/2![American Airlines logo]()
$534
This United Airlines deal was found by Cheapflights users on 2/3. 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 3/18:17 am
STL
- YUL
1 stop9h 23m
United Airlines
Wed 3/49:25 am
YUL
- STL
1 stop12h 40m
United Airlines
Deal found 2/3![United Airlines logo]()
$549
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 February 4, 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 February 4, 2026.
This American Airlines deal was found by Cheapflights users on 2/3. 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 4/75:21 pm
STL
- YUL
1 stop17h 23m
American Airlines
Thu 4/912:30 pm
YUL
- STL
1 stop12h 16m
American Airlines
Deal found 2/3![American Airlines logo]()
$342
This United Airlines deal was found by Cheapflights users on 2/3. 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 3/27:41 am
STL
- YUL
1 stop9h 59m
United Airlines
Wed 3/41:10 pm
YUL
- STL
1 stop10h 49m
United Airlines
Deal found 2/3![United Airlines logo]()
$549
This Kiwi.com deal was found by Cheapflights users on 2/3. 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 4/214:55 pm
STL
- YUL
2 stops21h 15m
Multiple Airlines
Thu 4/235:05 pm
YUL
- STL
1 stop4h 37m
Multiple Airlines
Deal found 2/3![Multiple Airlines logo]()
$555
This American Airlines deal was found by Cheapflights users on 2/4. 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 5/58:03 pm
STL
- YUL
1 stop14h 41m
American Airlines
Sat 5/912:30 pm
YUL
- STL
1 stop12h 26m
American Airlines
Deal found 2/4![American Airlines logo]()
$342
This American Airlines deal was found by Cheapflights users on 2/3. 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 4/175:21 pm
STL
- YUL
1 stop17h 23m
American Airlines
Tue 4/2112:30 pm
YUL
- STL
1 stop12h 16m
American Airlines
Deal found 2/3![American Airlines logo]()
$394
This American Airlines deal was found by Cheapflights users on 2/2. 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 4/175:21 pm
STL
- YUL
1 stop17h 23m
American Airlines
Mon 4/2012:30 pm
YUL
- STL
1 stop10h 47m
American Airlines
Deal found 2/2![American Airlines logo]()
$422
This United Airlines deal was found by Cheapflights users on 2/3. 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 3/18:17 am
STL
- YUL
1 stop9h 23m
United Airlines
Wed 3/49:25 am
YUL
- STL
1 stop12h 40m
United Airlines
Deal found 2/3![United Airlines logo]()
$549
This American Airlines deal was found by Cheapflights users on 2/3. 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 4/228:03 pm
STL
- YUL
1 stop14h 41m
American Airlines
Fri 4/247:45 am
YUL
- STL
1 stop12h 44m
American Airlines
Deal found 2/3![American Airlines logo]()
$455
This United Airlines deal was found by Cheapflights users on 2/4. 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 5/57:45 am
STL
- YUL
1 stop12h 41m
United Airlines
Sat 5/96:10 pm
YUL
- STL
Nonstop2h 55m
United Airlines
Deal found 2/4![United Airlines logo]()
$553
This American Airlines deal was found by Cheapflights users on 2/2. 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 5/36:29 am
STL
- YUL
1 stop7h 58m
American Airlines
Sat 5/912:30 pm
YUL
- STL
1 stop12h 26m
American Airlines
Deal found 2/2![American Airlines logo]()
$504
Last-minute flights from St. Louis to MontrealDiscover last-minute flight deals from St. Louis to Montreal. Data last updated February 4, 2026 and is based on user searches.
Discover last-minute flight deals from St. Louis to Montreal. Data last updated February 4, 2026 and is based on user searches.
This United Airlines deal was found by Cheapflights users on 2/3. 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 3/18:17 am
STL
- YUL
1 stop9h 23m
United Airlines
Wed 3/49:25 am
YUL
- STL
1 stop12h 40m
United Airlines
Deal found 2/3![United Airlines logo]()
$549
This Kiwi.com deal was found by Cheapflights users on 2/3. 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 3/13:49 pm
STL
- YUL
1 stop7h 41m
Multiple Airlines
Wed 3/48:00 am
YUL
- STL
2 stops38h 26m
Multiple Airlines
Deal found 2/3![Multiple Airlines logo]()
$583
This Delta deal was found by Cheapflights users on 2/3. 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 3/16:35 am
STL
- YUL
2 stops11h 00m
Delta
Wed 3/49:29 am
YUL
- STL
2 stops12h 14m
Delta
Deal found 2/3![Delta logo]()
$625
This United Airlines deal was found by Cheapflights users on 2/3. 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 3/29:55 am
STL
- YUL
2 stops10h 47m
United Airlines
Wed 3/46:00 am
YUL
- STL
1 stop11h 02m
United Airlines
Deal found 2/3![United Airlines logo]()
$559
This American Airlines deal was found by Cheapflights users on 2/2. 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 3/196:00 am
STL
- YUL
1 stop15h 56m
American Airlines
Thu 3/267:30 am
YUL
- STL
1 stop16h 20m
American Airlines
Deal found 2/2![American Airlines logo]()
$595
This Kiwi.com deal was found by Cheapflights users on 2/2. 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 3/198:02 am
STL
- YUL
2 stops31h 18m
Multiple Airlines
Thu 3/266:00 am
YUL
- STL
1 stop4h 46m
Multiple Airlines
Deal found 2/2![Multiple Airlines logo]()
$611
This Kiwi.com deal was found by Cheapflights users on 2/2. 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 3/206:10 am
STL
- YUL
1 stop25h 20m
Multiple Airlines
Wed 3/256:45 am
YUL
- STL
2 stops28h 46m
Multiple Airlines
Deal found 2/2![Multiple Airlines logo]()
$575
This lastminute.com deal was found by Cheapflights users on 2/3. 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 lastminute.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 3/206:10 am
STL
- YUL
1 stop25h 20m
WestJet
Fri 3/276:45 pm
YUL
- STL
1 stop15h 17m
WestJet
Deal found 2/3![WestJet logo]()
$576
This Justfly.com deal was found by Cheapflights users on 2/2. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 3/206:10 am
STL
- YUL
1 stop25h 20m
WestJet
Wed 3/256:00 am
YUL
- STL
1 stop7h 58m
WestJet
Deal found 2/2![WestJet logo]()
$577
This Gotogate deal was found by Cheapflights users on 2/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 3/204:05 pm
STL
- YUL
1 stop6h 47m
Air Canada
Fri 3/278:50 am
YUL
- STL
2 stops7h 39m
Air Canada
Deal found 2/3![Air Canada logo]()
$636
This Justfly.com deal was found by Cheapflights users on 2/3. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 3/285:29 pm
STL
- YUL
1 stop5h 11m
WestJet
Mon 4/64:45 pm
YUL
- STL
1 stop4h 57m
WestJet
Deal found 2/3![WestJet logo]()
$572
This Kiwi.com deal was found by Cheapflights users on 2/3. 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 3/284:21 pm
STL
- YUL
1 stop7h 09m
Multiple Airlines
Mon 4/68:00 am
YUL
- STL
2 stops27h 30m
Multiple Airlines
Deal found 2/3![Multiple Airlines logo]()
$612
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 February 4, 2026.
Search for one-way flight options from St. Louis to Montreal. Find affordable one-way fares based on user searches. Data last updated February 4, 2026.
This American Airlines deal was found by Cheapflights users on 2/3. 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 4/218:03 pm
STL
- YUL
1 stop14h 41m
American Airlines
Deal found 2/3![American Airlines logo]()
$128
This Kiwi.com deal was found by Cheapflights users on 2/2. 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 3/33:49 pm
STL
- YUL
1 stop7h 41m
Multiple Airlines
Deal found 2/2![Multiple Airlines logo]()
$138
This Kiwi.com deal was found by Cheapflights users on 2/3. 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 4/228:13 pm
STL
- YUL
3 stops21h 12m
Multiple Airlines
Deal found 2/3![Multiple Airlines logo]()
$171
This Kiwi.com deal was found by Cheapflights users on 2/3. 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 4/2311:21 am
STL
- YUL
2 stops12h 24m
Multiple Airlines
Deal found 2/3![Multiple Airlines logo]()
$186
This Kiwi.com deal was found by Cheapflights users on 2/2. 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 3/2012:16 pm
STL
- YUL
3 stops27h 14m
Multiple Airlines
Deal found 2/2![Multiple Airlines logo]()
$194
This Kiwi.com deal was found by Cheapflights users on 2/1. 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 5/18:13 pm
STL
- YUL
3 stops44h 02m
Multiple Airlines
Deal found 2/1![Multiple Airlines logo]()
$203
This American Airlines deal was found by Cheapflights users on 2/3. 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 4/248:03 pm
STL
- YUL
1 stop14h 41m
American Airlines
Deal found 2/3![American Airlines logo]()
$206
This Kiwi.com deal was found by Cheapflights users on 2/3. 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 4/248:13 pm
STL
- YUL
2 stops27h 32m
Multiple Airlines
Deal found 2/3![Multiple Airlines logo]()
$207
This Kiwi.com deal was found by Cheapflights users on 2/1. 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 4/3011:21 am
STL
- YUL
3 stops28h 54m
Multiple Airlines
Deal found 2/1![Multiple Airlines logo]()
$227
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 February 4, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $342 (American Airlines) |
One-way from | $128 (American Airlines) |
Popular in | October |
Cheapest in | June |
Good round-trip deal | $738 or less |
Good one-way deal | $299 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 February 4, 2026.
Use the filters below to find and compare flights from St. Louis to Montreal that are best for you.
Fly from
St. Louis
Fly to
Montreal
Route
Depart
Return
Price
St. LouisMontreal
STL - YUL
STLYUL
Lambert-St Louis
Tue 4/7
5:21 pm-11:44 am
1 stop17h 23m
Montreal Pierre Elliott Trudeau Intl
Thu 4/9
12:30 pm-11:46 pm
1 stop12h 16m
$342
St. LouisMontreal
STL - YUL
STLYUL
Lambert-St Louis
Tue 5/5
8:03 pm-11:44 am
1 stop14h 41m
Montreal Pierre Elliott Trudeau Intl
Sat 5/9
12:30 pm-11:56 pm
1 stop12h 26m
$342
St. LouisMontreal
STL - YUL
STLYUL
Lambert-St Louis
Fri 4/17
5:21 pm-11:44 am
1 stop17h 23m
Montreal Pierre Elliott Trudeau Intl
Tue 4/21
12:30 pm-11:46 pm
1 stop12h 16m
$394
St. LouisMontreal
STL - YUL
STLYUL
Lambert-St Louis
Fri 4/17
5:21 pm-11:44 am
1 stop17h 23m
Montreal Pierre Elliott Trudeau Intl
Mon 4/20
12:30 pm-10:17 pm
1 stop10h 47m
$422
St. LouisMontreal
STL - YUL
STLYUL
Lambert-St Louis
Wed 4/22
8:03 pm-11:44 am
1 stop14h 41m
Montreal Pierre Elliott Trudeau Intl
Fri 4/24
7:45 am-7:29 pm
1 stop12h 44m
$455
St. LouisMontreal
STL - YUL
STLYUL
Lambert-St Louis
Sun 5/3
6:29 am-3:27 pm
1 stop7h 58m
Montreal Pierre Elliott Trudeau Intl
Sat 5/9
12:30 pm-11:56 pm
1 stop12h 26m
$504
St. LouisMontreal
STL - YUL
STLYUL
Lambert-St Louis
Mon 3/2
7:41 am-6:40 pm
1 stop9h 59m
Montreal Pierre Elliott Trudeau Intl
Wed 3/4
1:10 pm-10:59 pm
1 stop10h 49m
$549
St. LouisMontreal
STL - YUL
STLYUL
Lambert-St Louis
Sun 3/1
8:17 am-6:40 pm
1 stop9h 23m
Montreal Pierre Elliott Trudeau Intl
Wed 3/4
9:25 am-9:05 pm
1 stop12h 40m
$549
St. LouisMontreal
STL - YUL
STLYUL
Lambert-St Louis
Tue 5/5
7:45 am-9:26 pm
1 stop12h 41m
Montreal Pierre Elliott Trudeau Intl
Sat 5/9
6:10 pm-8:05 pm
Nonstop2h 55m
$553
St. LouisMontreal
STL - YUL
STLYUL
Lambert-St Louis
Tue 4/21
4:55 pm-3:10 pm
2 stops21h 15m
Montreal Pierre Elliott Trudeau Intl
Thu 4/23
5:05 pm-8:42 pm
1 stop4h 37m
$555
Showing 1-10 of 19 results
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 February.
| 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 $220). Flying from St. Louis to Montreal in February is currently the most expensive (average of $1,289). 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.
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 February 4, 2026.
Read through reviews of airlines operating flights from St. Louis to Montreal, such as Delta, United Airlines, and American Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Overall
7.9
Crew
8.5
Comfort
7.9
Boarding
8.1
Food
7.2
Entertainment
7.8
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
Overall
7.9
Crew
8.5
Comfort
7.9
Boarding
8.1
Food
7.2
Entertainment
7.8
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
Overall
7.9
Crew
8.5
Comfort
7.9
Boarding
8.1
Food
7.2
Entertainment
7.8
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
Overall
7.9
Crew
8.5
Comfort
7.9
Boarding
8.1
Food
7.2
Entertainment
7.8
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
Overall
7.9
Crew
8.5
Comfort
7.9
Boarding
8.1
Food
7.2
Entertainment
7.8
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - 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.
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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 February 4, 2026.
St. Louis and Montreal flights
Browse other St. Louis and Montreal flight options. Last updated on February 4, 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 February 4, 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 February 4, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$212 | Average$634 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$246 | Average$582 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$285 | Average$667 | FlexibilityNo cancel fee | On-time67% | |
| Cheapest$348 | Average$683 | FlexibilityNo cancel fee | On-time71% |