$214+ Cheap flights from St. Louis (STL) to Pierre Elliott Trudeau Intl (YUL)
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 5/18. Fares are subject to change and may not be available on all flights or dates of travel.
STL — YUL
May 28 — Jun 41
Round-trip
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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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 Pierre Elliott Trudeau Intl
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Last-minute
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Cheapest flights from St. Louis to Pierre Elliott Trudeau IntlExplore the most affordable flight options available from St. Louis to Pierre Elliott Trudeau Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 28, 2026.
Explore the most affordable flight options available from St. Louis to Pierre Elliott Trudeau Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 28, 2026.
This Gotogate deal was found by Cheapflights users on 4/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/91:05 pm
STL
- YUL
Nonstop2h 35m
Air Canada
Sun 5/106:30 pm
YUL
- STL
Nonstop2h 55m
Air Canada
Deal found 4/25![Air Canada logo]()
$436
This Mytrip deal was found by Cheapflights users on 4/23. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/157:05 am
STL
- YUL
1 stop5h 16m
Air Canada
Sun 5/176:30 pm
YUL
- STL
Nonstop2h 55m
Air Canada
Deal found 4/23![Air Canada logo]()
$464
This Delta deal was found by Cheapflights users on 4/22. 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.
Tue 5/266:00 am
STL
- YUL
1 stop11h 53m
Delta
Tue 6/29:30 am
YUL
- STL
1 stop12h 09m
Delta
Deal found 4/22![Delta logo]()
$485
This Air Canada deal was found by Cheapflights users on 4/22. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/297:05 am
STL
- YUL
2 stops7h 44m
Air Canada
Fri 5/296:30 pm
YUL
- STL
Nonstop2h 55m
Air Canada
Deal found 4/22![Air Canada logo]()
$493
This American Airlines deal was found by Cheapflights users on 4/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/97:30 am
STL
- YUL
1 stop14h 29m
American Airlines
Tue 6/1612:30 pm
YUL
- STL
1 stop12h 26m
American Airlines
Deal found 4/25![American Airlines logo]()
$499
This Air Canada deal was found by Cheapflights users on 4/22. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/131:05 pm
STL
- YUL
Nonstop2h 35m
Air Canada
Thu 5/146:30 pm
YUL
- STL
Nonstop2h 55m
Air Canada
Deal found 4/22![Air Canada logo]()
$505
This Delta deal was found by Cheapflights users on 4/22. 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.
Tue 5/266:00 am
STL
- YUL
1 stop11h 53m
Delta
Thu 6/47:00 am
YUL
- STL
1 stop6h 20m
Delta
Deal found 4/22![Delta logo]()
$507
This United Airlines deal was found by Cheapflights users on 4/22. 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 Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/296:00 am
STL
- YUL
2 stops7h 40m
United Airlines
Fri 5/294:55 pm
YUL
- STL
1 stop5h 26m
United Airlines
Deal found 4/22![United Airlines logo]()
$509
Best flights from St. Louis to Pierre Elliott Trudeau IntlDiscover carefully curated flight deals from St. Louis to Pierre Elliott Trudeau Intl that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated April 28, 2026.
Discover carefully curated flight deals from St. Louis to Pierre Elliott Trudeau Intl that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated April 28, 2026.
This Delta deal was found by Cheapflights users on 4/22. 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.
Mon 5/256:45 am
STL
- YUL
1 stop8h 30m
Delta
Tue 6/29:30 am
YUL
- STL
1 stop12h 09m
Delta
Deal found 4/22![Delta logo]()
$507
This United Airlines deal was found by Cheapflights users on 4/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/36:00 am
STL
- YUL
1 stop6h 09m
United Airlines
Fri 6/56:10 am
YUL
- STL
1 stop10h 36m
United Airlines
Deal found 4/26![United Airlines logo]()
$530
This Delta deal was found by Cheapflights users on 4/22. 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.
Fri 5/291:27 pm
STL
- YUL
1 stop9h 30m
Delta
Wed 6/39:30 am
YUL
- STL
2 stops15h 29m
Delta
Deal found 4/22![Delta logo]()
$517
This United Airlines deal was found by Cheapflights users on 4/22. 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 Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/296:00 am
STL
- YUL
1 stop6h 09m
United Airlines
Thu 6/49:45 am
YUL
- STL
1 stop5h 38m
United Airlines
Deal found 4/22![United Airlines logo]()
$530
This Delta deal was found by Cheapflights users on 4/22. 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.
Sun 5/101:59 pm
STL
- YUL
1 stop8h 14m
Delta
Tue 5/197:44 pm
YUL
- STL
1 stop13h 29m
Delta
Deal found 4/22![Delta logo]()
$529
This United Airlines deal was found by Cheapflights users on 4/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/231:13 pm
STL
- YUL
2 stops10h 00m
United Airlines
Sat 5/306:10 am
YUL
- STL
1 stop5h 24m
United Airlines
Deal found 4/25![United Airlines logo]()
$540
This Delta deal was found by Cheapflights users on 4/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/236:04 pm
STL
- YUL
1 stop4h 09m
Delta
Sat 5/307:00 am
YUL
- STL
1 stop8h 48m
Delta
Deal found 4/25![Delta logo]()
$530
This Delta deal was found by Cheapflights users on 4/22. 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 5/285:20 pm
STL
- YUL
1 stop5h 37m
Delta
Thu 6/412:40 pm
YUL
- STL
1 stop6h 16m
Delta
Deal found 4/22![Delta logo]()
$530
This Delta deal was found by Cheapflights users on 4/22. 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 5/146:00 am
STL
- YUL
1 stop6h 39m
Delta
Wed 5/2012:40 pm
YUL
- STL
1 stop6h 06m
Delta
Deal found 4/22![Delta logo]()
$530
This Delta deal was found by Cheapflights users on 4/22. 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 5/146:00 am
STL
- YUL
1 stop6h 39m
Delta
Sat 5/167:00 am
YUL
- STL
1 stop5h 54m
Delta
Deal found 4/22![Delta logo]()
$530
Last-minute flights from St. Louis to Pierre Elliott Trudeau IntlDiscover last-minute flight deals from St. Louis to Pierre Elliott Trudeau Intl. Data last updated April 28, 2026 and is based on user searches.
Discover last-minute flight deals from St. Louis to Pierre Elliott Trudeau Intl. Data last updated April 28, 2026 and is based on user searches.
This Gotogate deal was found by Cheapflights users on 4/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/91:05 pm
STL
- YUL
Nonstop2h 35m
Air Canada
Sun 5/106:30 pm
YUL
- STL
Nonstop2h 55m
Air Canada
Deal found 4/25![Air Canada logo]()
$436
This Air Canada deal was found by Cheapflights users on 4/22. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/131:05 pm
STL
- YUL
Nonstop2h 35m
Air Canada
Thu 5/146:30 pm
YUL
- STL
Nonstop2h 55m
Air Canada
Deal found 4/22![Air Canada logo]()
$505
This Mytrip deal was found by Cheapflights users on 4/23. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/157:05 am
STL
- YUL
1 stop5h 16m
Air Canada
Sun 5/176:30 pm
YUL
- STL
Nonstop2h 55m
Air Canada
Deal found 4/23![Air Canada logo]()
$464
This Delta deal was found by Cheapflights users on 4/22. 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.
Tue 5/266:00 am
STL
- YUL
1 stop11h 53m
Delta
Tue 6/29:30 am
YUL
- STL
1 stop12h 09m
Delta
Deal found 4/22![Delta logo]()
$485
This Delta deal was found by Cheapflights users on 4/22. 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.
Tue 5/266:00 am
STL
- YUL
1 stop11h 53m
Delta
Sun 5/3112:40 pm
YUL
- STL
1 stop9h 58m
Delta
Deal found 4/22![Delta logo]()
$507
This Air Canada deal was found by Cheapflights users on 4/22. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/297:05 am
STL
- YUL
2 stops7h 44m
Air Canada
Fri 5/296:30 pm
YUL
- STL
Nonstop2h 55m
Air Canada
Deal found 4/22![Air Canada logo]()
$493
This United Airlines deal was found by Cheapflights users on 4/22. 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 Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/296:00 am
STL
- YUL
2 stops7h 40m
United Airlines
Fri 5/294:55 pm
YUL
- STL
1 stop5h 26m
United Airlines
Deal found 4/22![United Airlines logo]()
$509
This Delta deal was found by Cheapflights users on 4/22. 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.
Sat 5/306:04 pm
STL
- YUL
2 stops13h 35m
Delta
Tue 6/27:44 pm
YUL
- STL
1 stop13h 29m
Delta
Deal found 4/22![Delta logo]()
$516
One-way flights from St. Louis to Pierre Elliott Trudeau IntlSearch for one-way flight options from St. Louis to Pierre Elliott Trudeau Intl. Find affordable one-way fares based on user searches. Data last updated April 28, 2026.
Search for one-way flight options from St. Louis to Pierre Elliott Trudeau Intl. Find affordable one-way fares based on user searches. Data last updated April 28, 2026.
This Kiwi.com deal was found by Cheapflights users on 4/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/184:19 pm
STL
- YUL
2 stops24h 56m
Multiple Airlines
Deal found 4/27![Multiple Airlines logo]()
$214
This Air Canada deal was found by Cheapflights users on 4/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/281:05 pm
STL
- YUL
Nonstop2h 35m
Air Canada
Deal found 4/27![Air Canada logo]()
$226
This United Airlines deal was found by Cheapflights users on 4/23. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 6/76:00 am
STL
- YUL
1 stop6h 09m
United Airlines
Deal found 4/23![United Airlines logo]()
$229
This Kiwi.com deal was found by Cheapflights users on 4/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/137:19 pm
STL
- YUL
3 stops44h 56m
Multiple Airlines
Deal found 4/24![Multiple Airlines logo]()
$230
This American Airlines deal was found by Cheapflights users on 4/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/286:15 am
STL
- YUL
1 stop8h 13m
American Airlines
Deal found 4/27![American Airlines logo]()
$235
This Air Canada deal was found by Cheapflights users on 4/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/271:20 pm
STL
- YUL
Nonstop2h 35m
Air Canada
Deal found 4/25![Air Canada logo]()
$236
This Kiwi.com deal was found by Cheapflights users on 4/23. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/234:17 pm
STL
- YUL
2 stops31h 08m
Multiple Airlines
Deal found 4/23![Multiple Airlines logo]()
$239
This United Airlines deal was found by Cheapflights users on 4/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/286:00 am
STL
- YUL
2 stops7h 40m
United Airlines
Deal found 4/27![United Airlines logo]()
$241
This Kiwi.com deal was found by Cheapflights users on 4/23. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/244:17 pm
STL
- YUL
2 stops26h 01m
Multiple Airlines
Deal found 4/23![Multiple Airlines logo]()
$242
This United Airlines deal was found by Cheapflights users on 4/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/78:25 am
STL
- YUL
1 stop5h 15m
United Airlines
Deal found 4/27![United Airlines logo]()
$246
Find flight deals from St. Louis to Pierre Elliott Trudeau Intl
Discover tips and strategies to find the most affordable flight options for your journey from St. Louis (STL) to Pierre Elliott Trudeau Intl (YUL). 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 April 28, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $436 (Gotogate) |
One-way from | $214 (Kiwi.com) |
Popular in | September |
Cheapest in | July |
Average price | $684 |
Good round-trip deal | $995 or less |
Good one-way deal | $343 or less |
Cheapflights Fare Finder
Customize your flight search to find flights from St. Louis to Pierre Elliott Trudeau Intl 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 April 28, 2026.
Use the filters below to find and compare flights from St. Louis to Montreal Pierre Elliott Trudeau Intl Airport that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
St. LouisMontreal
STL - YUL
STLYUL
Lambert-St Louis
Mon 5/25
6:45 am-4:15 pm
1 stop8h 30m
Montreal Pierre Elliott Trudeau Intl
Tue 6/2
9:30 am-8:39 pm
1 stop12h 09m
$507
St. LouisMontreal
STL - YUL
STLYUL
Lambert-St Louis
Fri 5/29
1:27 pm-11:57 pm
1 stop9h 30m
Montreal Pierre Elliott Trudeau Intl
Wed 6/3
9:30 am-11:59 pm
2 stops15h 29m
$517
St. LouisMontreal
STL - YUL
STLYUL
Lambert-St Louis
Sun 5/10
1:59 pm-11:13 pm
1 stop8h 14m
Montreal Pierre Elliott Trudeau Intl
Tue 5/19
7:44 pm-8:13 am
1 stop13h 29m
$529
St. LouisMontreal
STL - YUL
STLYUL
Lambert-St Louis
Wed 6/3
6:00 am-1:09 pm
1 stop6h 09m
Montreal Pierre Elliott Trudeau Intl
Fri 6/5
6:10 am-3:46 pm
1 stop10h 36m
$530
Quickest round-trip
St. LouisMontreal
STL - YUL
STLYUL
Lambert-St Louis
Fri 5/29
6:00 am-1:09 pm
1 stop6h 09m
Montreal Pierre Elliott Trudeau Intl
Thu 6/4
9:45 am-2:23 pm
1 stop5h 38m
$530
St. LouisMontreal
STL - YUL
STLYUL
Lambert-St Louis
Sat 5/23
6:04 pm-11:13 pm
1 stop4h 09m
Montreal Pierre Elliott Trudeau Intl
Sat 5/30
7:00 am-2:48 pm
1 stop8h 48m
$530
St. LouisMontreal
STL - YUL
STLYUL
Lambert-St Louis
Thu 5/28
5:20 pm-11:57 pm
1 stop5h 37m
Montreal Pierre Elliott Trudeau Intl
Thu 6/4
12:40 pm-5:56 pm
1 stop6h 16m
$530
St. LouisMontreal
STL - YUL
STLYUL
Lambert-St Louis
Thu 5/14
6:00 am-1:39 pm
1 stop6h 39m
Montreal Pierre Elliott Trudeau Intl
Wed 5/20
12:40 pm-5:46 pm
1 stop6h 06m
$530
St. LouisMontreal
STL - YUL
STLYUL
Lambert-St Louis
Thu 5/14
6:00 am-1:39 pm
1 stop6h 39m
Montreal Pierre Elliott Trudeau Intl
Sat 5/16
7:00 am-11:54 am
1 stop5h 54m
$530
St. LouisMontreal
STL - YUL
STLYUL
Lambert-St Louis
Sat 5/23
1:13 pm-12:13 am
2 stops10h 00m
Montreal Pierre Elliott Trudeau Intl
Sat 5/30
6:10 am-10:34 am
1 stop5h 24m
$540
Showing 1-10 of 20 resultsSorted by cheapest first
Compare providers for flights from St. Louis to Pierre Elliott Trudeau Intl
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 Pierre Elliott Trudeau Intl in April.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy1 star | Trust Score*3 stars |
- Most accurate provider: When it comes to deals on St. Louis-Montreal Pierre Elliott Trudeau Intl Airport 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 Pierre Elliott Trudeau Intl Airport flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from St. Louis-Montreal Pierre Elliott Trudeau Intl Airport flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on St. Louis-Montreal Pierre Elliott Trudeau Intl Airport 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 Pierre Elliott Trudeau Intl Airport 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 Pierre Elliott Trudeau Intl
Have a flexible travel schedule? Discover the best time to fly to Pierre Elliott Trudeau Intl from St. Louis with our price prediction graph.
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 Pierre Elliott Trudeau Intl Airport
What is the cheapest time of day to fly from STL to YUL?
Find hourly flight availability from St. Louis to Pierre Elliott Trudeau Intl. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated April 28, 2026.
When flying from St. Louis to Montreal Pierre Elliott Trudeau Intl Airport, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.
How much does it cost to fly round-trip from St. Louis to Montreal Pierre Elliott Trudeau Intl Airport?
Reviews of airlines servicing Pierre Elliott Trudeau Intl
Get insights into the airlines that provide service to Pierre Elliott Trudeau Intl. 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 Pierre Elliott Trudeau Intl. Reviews last updated April 28, 2026.
Get a feel of what it's like to fly with Delta,United Airlines, andAmerican Airlines from St. Louis to Montreal Pierre Elliott Trudeau Intl Airport by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Entertainment
7.8
Comfort
7.9
Boarding
8.1
Overall
7.9
Food
7.2
Crew
8.5
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
Entertainment
7.8
Comfort
7.9
Boarding
8.1
Overall
7.9
Food
7.2
Crew
8.5
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
Entertainment
7.8
Comfort
7.9
Boarding
8.1
Overall
7.9
Food
7.2
Crew
8.5
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
Entertainment
7.8
Comfort
7.9
Boarding
8.1
Overall
7.9
Food
7.2
Crew
8.5
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
Entertainment
7.8
Comfort
7.9
Boarding
8.1
Overall
7.9
Food
7.2
Crew
8.5
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 Pierre Elliott Trudeau Intl. 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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Top 4 airlines flying from St. Louis to Pierre Elliott Trudeau Intl
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| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$212 | Average$634 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$239 | Average$765 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$318 | Average$647 | FlexibilityNo cancel fee | On-time67% | |
| Cheapest$348 | Average$650 | FlexibilityNo cancel fee | On-time71% |