$218+ 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 10/14. Fares are subject to change and may not be available on all flights or dates of travel.
STL — YMQ
Aug 7 — Aug 141
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
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 July 8, 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 July 8, 2026.
This Delta deal was found by Cheapflights users on 7/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/85:30 pm
STL
- YUL
1 stop14h 05m
Delta
Tue 9/159:30 am
YUL
- STL
1 stop11h 36m
Delta
Deal found 7/8![Delta logo]()
$535
This Delta deal was found by Cheapflights users on 7/7. 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.
Mon 10/127:00 am
STL
- YUL
1 stop24h 33m
Delta
Tue 10/207:00 am
YUL
- STL
2 stops14h 15m
Delta
Deal found 7/7![Delta logo]()
$544
This Delta deal was found by Cheapflights users on 7/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/85:30 pm
STL
- YUL
1 stop14h 05m
Delta
Mon 9/147:43 pm
YUL
- STL
1 stop17h 00m
Delta
Deal found 7/8![Delta logo]()
$562
This Kiwi.com deal was found by Cheapflights users on 7/8. 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 8/74:57 pm
STL
- YUL
2 stops20h 11m
Multiple Airlines
Fri 8/146:00 am
YUL
- STL
1 stop4h 37m
Multiple Airlines
Deal found 7/8![Multiple Airlines logo]()
$571
This Kiwi.com deal was found by Cheapflights users on 7/8. 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
Fri 8/286:51 pm
YUL
- STL
1 stop6h 07m
Multiple Airlines
Deal found 7/8![Multiple Airlines logo]()
$573
This Kiwi.com deal was found by Cheapflights users on 7/7. 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 8/174:57 pm
STL
- YUL
2 stops24h 18m
Multiple Airlines
Thu 8/2012:44 pm
YUL
- STL
1 stop6h 09m
Multiple Airlines
Deal found 7/7![Multiple Airlines logo]()
$575
This Delta deal was found by Cheapflights users on 7/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/85:30 pm
STL
- YUL
1 stop14h 05m
Delta
Sat 9/199:30 am
YUL
- STL
2 stops12h 05m
Delta
Deal found 7/8![Delta logo]()
$578
This Kiwi.com deal was found by Cheapflights users on 7/5. 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 8/166:34 pm
STL
- YUL
2 stops22h 41m
Multiple Airlines
Fri 8/216:00 am
YUL
- STL
1 stop4h 37m
Multiple Airlines
Deal found 7/5![Multiple Airlines logo]()
$582
This Delta deal was found by Cheapflights users on 7/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/85:30 pm
STL
- YUL
1 stop14h 05m
Delta
Fri 9/187:00 am
YUL
- STL
1 stop7h 23m
Delta
Deal found 7/8![Delta logo]()
$587
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 July 8, 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 July 8, 2026.
This Delta deal was found by Cheapflights users on 7/7. 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.
Mon 10/125:28 pm
STL
- YUL
2 stops14h 05m
Delta
Tue 10/207:00 am
YUL
- STL
2 stops14h 15m
Delta
Deal found 7/7![Delta logo]()
$583
This United deal was found by Cheapflights users on 7/7. 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.
Sun 9/68:50 am
STL
- YUL
1 stop11h 36m
Multiple Airlines
Wed 9/93:30 pm
YUL
- STL
1 stop5h 50m
Multiple Airlines
Deal found 7/7![Multiple Airlines logo]()
$638
This United Airlines deal was found by Cheapflights users on 7/7. 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 8/48:43 am
STL
- YUL
1 stop4h 57m
United Airlines
Tue 8/114:55 pm
YUL
- STL
1 stop6h 05m
United Airlines
Deal found 7/7![United Airlines logo]()
$640
This United deal was found by Cheapflights users on 7/8. 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 11/141:08 pm
STL
- YUL
2 stops7h 34m
Multiple Airlines
Sat 11/2111:10 am
YUL
- STL
1 stop5h 16m
Multiple Airlines
Deal found 7/8![Multiple Airlines logo]()
$648
This Delta deal was found by Cheapflights users on 7/5. 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 10/146:00 am
STL
- YUL
2 stops11h 59m
Delta
Tue 10/209:30 am
YUL
- STL
2 stops12h 11m
Delta
Deal found 7/5![Delta logo]()
$709
This Delta deal was found by Cheapflights users on 7/8. 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 8/56:30 am
STL
- YUL
2 stops11h 24m
Delta
Wed 8/129:30 am
YUL
- STL
2 stops12h 12m
Delta
Deal found 7/8![Delta logo]()
$711
This United deal was found by Cheapflights users on 7/4. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/286:54 pm
STL
- YUL
1 stop14h 46m
Multiple Airlines
Mon 8/314:55 pm
YUL
- STL
Nonstop2h 47m
Multiple Airlines
Deal found 7/4![Multiple Airlines logo]()
$717
This Delta deal was found by Cheapflights users on 7/7. 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 7/231:54 pm
STL
- YUL
1 stop8h 31m
Delta
Sun 7/266:00 am
YUL
- STL
1 stop8h 05m
Delta
Deal found 7/7![Delta logo]()
$724
This United deal was found by Cheapflights users on 7/6. 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 8/209:30 am
STL
- YUL
1 stop7h 00m
Multiple Airlines
Sun 8/239:10 am
YUL
- STL
1 stop5h 52m
Multiple Airlines
Deal found 7/6![Multiple Airlines logo]()
$730
This United deal was found by Cheapflights users on 7/5. 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 10/1411:35 am
STL
- YUL
1 stop4h 55m
Multiple Airlines
Mon 10/198:40 am
YUL
- STL
2 stops6h 20m
Multiple Airlines
Deal found 7/5![Multiple Airlines logo]()
$736
This Delta deal was found by Cheapflights users on 7/7. 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 9/66:00 am
STL
- YUL
2 stops11h 54m
Delta
Wed 9/99:30 am
YUL
- STL
2 stops11h 28m
Delta
Deal found 7/7![Delta logo]()
$739
Last-minute flights from St. Louis to MontrealDiscover last-minute flight deals from St. Louis to Montreal. Data last updated July 8, 2026 and is based on user searches.
Discover last-minute flight deals from St. Louis to Montreal. Data last updated July 8, 2026 and is based on user searches.
This Kiwi.com deal was found by Cheapflights users on 7/7. 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 8/46:34 pm
STL
- YUL
2 stops22h 41m
Multiple Airlines
Tue 8/116:00 am
YUL
- STL
1 stop4h 37m
Multiple Airlines
Deal found 7/7![Multiple Airlines logo]()
$589
This American Airlines deal was found by Cheapflights users on 7/8. 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 8/511:35 am
STL
- YUL
1 stop10h 51m
American Airlines
Wed 8/1210:31 am
YUL
- STL
1 stop11h 13m
American Airlines
Deal found 7/8![American Airlines logo]()
$592
This Kiwi.com deal was found by Cheapflights users on 7/8. 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 8/54:57 pm
STL
- YUL
2 stops20h 11m
Multiple Airlines
Wed 8/126:51 pm
YUL
- STL
1 stop22h 26m
Multiple Airlines
Deal found 7/8![Multiple Airlines logo]()
$605
This Kiwi.com deal was found by Cheapflights users on 7/8. 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 8/74:57 pm
STL
- YUL
2 stops20h 11m
Multiple Airlines
Fri 8/146:00 am
YUL
- STL
1 stop4h 37m
Multiple Airlines
Deal found 7/8![Multiple Airlines logo]()
$571
This Kiwi.com deal was found by Cheapflights users on 7/4. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/74:57 pm
STL
- YUL
2 stops20h 11m
Multiple Airlines
Tue 8/116:51 pm
YUL
- STL
1 stop5h 30m
Multiple Airlines
Deal found 7/4![Multiple Airlines logo]()
$590
This Kiwi.com deal was found by Cheapflights users on 7/5. 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 8/144:57 pm
STL
- YUL
2 stops24h 18m
Multiple Airlines
Fri 8/2112:44 pm
YUL
- STL
1 stop6h 09m
Multiple Airlines
Deal found 7/5![Multiple Airlines logo]()
$596
This Kiwi.com deal was found by Cheapflights users on 7/5. 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 8/166:34 pm
STL
- YUL
2 stops22h 41m
Multiple Airlines
Fri 8/216:00 am
YUL
- STL
1 stop4h 37m
Multiple Airlines
Deal found 7/5![Multiple Airlines logo]()
$582
This Kiwi.com deal was found by Cheapflights users on 7/7. 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 8/174:57 pm
STL
- YUL
2 stops24h 18m
Multiple Airlines
Thu 8/2012:44 pm
YUL
- STL
1 stop6h 09m
Multiple Airlines
Deal found 7/7![Multiple Airlines logo]()
$575
This Delta deal was found by Cheapflights users on 7/8. 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 8/189:25 am
STL
- YUL
1 stop8h 29m
Delta
Fri 8/217:00 am
YUL
- STL
1 stop8h 33m
Delta
Deal found 7/8![Delta logo]()
$587
This Kiwi.com deal was found by Cheapflights users on 7/8. 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
Fri 8/286:51 pm
YUL
- STL
1 stop6h 07m
Multiple Airlines
Deal found 7/8![Multiple Airlines logo]()
$573
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 July 8, 2026.
Search for one-way flight options from St. Louis to Montreal. Find affordable one-way fares based on user searches. Data last updated July 8, 2026.
This Kiwi.com deal was found by Cheapflights users on 7/8. 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 10/1410:35 am
STL
- YUL
3 stops36h 50m
Multiple Airlines
Deal found 7/8![Multiple Airlines logo]()
$218
This Delta deal was found by Cheapflights users on 7/8. 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 10/135:30 pm
STL
- YUL
1 stop14h 03m
Delta
Deal found 7/8![Delta logo]()
$227
This Kiwi.com deal was found by Cheapflights users on 7/4. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/244:57 pm
STL
- YUL
2 stops24h 18m
Multiple Airlines
Deal found 7/4![Multiple Airlines logo]()
$240
This Delta deal was found by Cheapflights users on 7/7. 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.
Mon 10/127:00 am
STL
- YUL
1 stop24h 33m
Delta
Deal found 7/7![Delta logo]()
$244
This Kiwi.com deal was found by Cheapflights users on 7/7. 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 8/154:57 pm
STL
- YUL
2 stops25h 21m
Multiple Airlines
Deal found 7/7![Multiple Airlines logo]()
$247
This Kiwi.com deal was found by Cheapflights users on 7/8. 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 10/1210:35 am
STL
- YUL
3 stops50h 33m
Multiple Airlines
Deal found 7/8![Multiple Airlines logo]()
$248
This Delta deal was found by Cheapflights users on 7/8. 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 10/145:30 pm
STL
- YUL
1 stop14h 03m
Delta
Deal found 7/8![Delta logo]()
$250
This Kiwi.com deal was found by Cheapflights users on 7/7. 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 7/274:57 pm
STL
- YUL
3 stops18h 13m
Multiple Airlines
Deal found 7/7![Multiple Airlines logo]()
$252
This Kiwi.com deal was found by Cheapflights users on 7/8. 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 10/1310:35 am
STL
- YUL
2 stops26h 33m
Multiple Airlines
Deal found 7/8![Multiple Airlines logo]()
$255
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 July 8, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $573 (Kiwi.com) |
One-way from | $218 (Kiwi.com) |
Popular in | March |
Cheapest in | February |
Average price | $617 |
Good round-trip deal | $649 or less |
Good one-way deal | $360 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 July 8, 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
Mon 10/12
5:28 pm-8:33 am
2 stops14h 05m
Montreal Pierre Elliott Trudeau Intl
Tue 10/20
7:00 am-8:15 pm
2 stops14h 15m
$583
St. LouisMontreal
STL - YUL
STLYUL
Lambert-St Louis
Sun 9/6
8:50 am-9:26 pm
1 stop11h 36m
Montreal Pierre Elliott Trudeau Intl
Wed 9/9
3:30 pm-8:20 pm
1 stop5h 50m
$638
Quickest round-trip
St. LouisMontreal
STL - YUL
STLYUL
Lambert-St Louis
Tue 8/4
8:43 am-2:40 pm
1 stop4h 57m
Montreal Pierre Elliott Trudeau Intl
Tue 8/11
4:55 pm-10:00 pm
1 stop6h 05m
$640
St. LouisMontreal
STL - YUL
STLYUL
Lambert-St Louis
Sat 11/14
1:08 pm-9:42 pm
2 stops7h 34m
Montreal Pierre Elliott Trudeau Intl
Sat 11/21
11:10 am-3:26 pm
1 stop5h 16m
$648
St. LouisMontreal
STL - YUL
STLYUL
Lambert-St Louis
Wed 10/14
6:00 am-6:59 pm
2 stops11h 59m
Montreal Pierre Elliott Trudeau Intl
Tue 10/20
9:30 am-8:41 pm
2 stops12h 11m
$709
St. LouisMontreal
STL - YUL
STLYUL
Lambert-St Louis
Wed 8/5
6:30 am-6:54 pm
2 stops11h 24m
Montreal Pierre Elliott Trudeau Intl
Wed 8/12
9:30 am-8:42 pm
2 stops12h 12m
$711
St. LouisMontreal
STL - YUL
STLYUL
Lambert-St Louis
Fri 8/28
6:54 pm-10:40 am
1 stop14h 46m
Montreal Pierre Elliott Trudeau Intl
Mon 8/31
4:55 pm-6:42 pm
Nonstop2h 47m
$717
St. LouisMontreal
STL - YUL
STLYUL
Lambert-St Louis
Thu 7/23
1:54 pm-11:25 pm
1 stop8h 31m
Montreal Pierre Elliott Trudeau Intl
Sun 7/26
6:00 am-1:05 pm
1 stop8h 05m
$724
St. LouisMontreal
STL - YUL
STLYUL
Lambert-St Louis
Thu 8/20
9:30 am-5:30 pm
1 stop7h 00m
Montreal Pierre Elliott Trudeau Intl
Sun 8/23
9:10 am-2:02 pm
1 stop5h 52m
$730
St. LouisMontreal
STL - YUL
STLYUL
Lambert-St Louis
Wed 10/14
11:35 am-5:30 pm
1 stop4h 55m
Montreal Pierre Elliott Trudeau Intl
Mon 10/19
8:40 am-2:00 pm
2 stops6h 20m
$736
Showing 1-10 of 20 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 July.
| 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 July 8, 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 July 8, 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?
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 July 8, 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.
Boarding
8.1
Entertainment
7.8
Food
7.2
Comfort
7.8
Overall
7.8
Crew
8.5
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Boarding
8.1
Entertainment
7.8
Food
7.2
Comfort
7.8
Overall
7.8
Crew
8.5
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Boarding
8.1
Entertainment
7.8
Food
7.2
Comfort
7.8
Overall
7.8
Crew
8.5
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Boarding
8.1
Entertainment
7.8
Food
7.2
Comfort
7.8
Overall
7.8
Crew
8.5
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Related info for your journey
Find useful and relevant information for your journey from St. Louis to Montreal. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Browse thousands of different options on Cheapflights for your next trip
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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 July 8, 2026.
St. Louis and Montreal flights
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Top 3 airlines flying from St. Louis to Montreal
Discover the top 3 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 July 8, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$257 | Average$636 | FlexibilityNo cancel fee | On-time67% | |
| Cheapest$296 | Average$754 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$348 | Average$683 | FlexibilityNo cancel fee | On-time71% |