$173+ Cheap flights from St. Louis (STL) to Pierre Elliott Trudeau Intl (YUL)
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 9/28. Fares are subject to change and may not be available on all flights or dates of travel.
STL — YUL
Oct 9 — Oct 161
Round-trip
1 adult, Economy
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Find cheap flights from St. Louis to Pierre Elliott Trudeau Intl 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 Pierre Elliott Trudeau Intl
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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 September 9, 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 September 9, 2026.
This American Airlines deal was found by Cheapflights users on 9/8. 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.
Sat 10/175:23 pm -
1 stop17h 21m
Wed 10/215:34 pm -
1 stop18h 16m
Deal found 9/8![American Airlines logo]()
$458
This American Airlines deal was found by Cheapflights users on 9/7. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/78:15 pm -
1 stop14h 10m
Wed 11/1112:10 pm -
1 stop12h 49m
Deal found 9/7![American Airlines logo]()
$486
This American Airlines deal was found by Cheapflights users on 9/8. 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.
Fri 10/27:21 am -
1 stop8h 32m
Tue 10/65:34 pm -
1 stop18h 16m
Deal found 9/8![American Airlines logo]()
$537
This American Airlines deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/295:00 am -
1 stop10h 52m
Mon 11/212:10 pm -
1 stop12h 49m
Deal found 9/9![American Airlines logo]()
$562
This Mytrip deal was found by Cheapflights users on 9/9. 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.
Thu 10/82:00 pm -
3 stops30h 12m
Mon 10/128:35 am -
2 stops6h 25m
Deal found 9/9![Multiple Airlines logo]()
$577
This Air Canada deal was found by Cheapflights users on 9/8. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/1512:10 pm -
Nonstop2h 31m
Wed 10/214:55 pm -
Nonstop2h 46m
Deal found 9/8![Air Canada logo]()
$588
This Air Canada deal was found by Cheapflights users on 9/9. 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 10/812:10 pm -
Nonstop2h 31m
Mon 10/124:55 pm -
Nonstop2h 46m
Deal found 9/9![Air Canada logo]()
$591
This American Airlines deal was found by Cheapflights users on 9/8. 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.
Tue 11/107:26 am -
2 stops13h 00m
Mon 11/161:04 pm -
2 stops11h 55m
Deal found 9/8![American Airlines logo]()
$594
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 September 9, 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 September 9, 2026.
This Air Canada deal was found by Cheapflights users on 9/9. 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 10/812:10 pm -
Nonstop2h 31m
Mon 10/122:00 pm -
1 stop7h 20m
Deal found 9/9![Air Canada logo]()
$599
This United Airlines deal was found by Cheapflights users on 9/8. 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 Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/301:08 pm -
1 stop20h 09m
Sat 10/311:10 pm -
1 stop9h 30m
Deal found 9/8![United Airlines logo]()
$652
This Delta deal was found by Cheapflights users on 9/5. 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.
Tue 10/65:31 pm -
1 stop14h 01m
Wed 10/147:50 pm -
1 stop13h 39m
Deal found 9/5![Delta logo]()
$695
This United deal was found by Cheapflights users on 9/5. 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.
Thu 10/89:30 am -
1 stop5h 40m
Sun 10/118:35 am -
2 stops6h 25m
Deal found 9/5![Multiple Airlines logo]()
$699
This United Airlines deal was found by Cheapflights users on 9/8. 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 Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/158:00 am -
1 stop8h 30m
Sat 10/178:35 am -
1 stop11h 25m
Deal found 9/8![United Airlines logo]()
$655
This Delta deal was found by Cheapflights users on 9/5. 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.
Mon 10/55:30 pm -
1 stop14h 02m
Wed 10/149:30 am -
1 stop11h 44m
Deal found 9/5![Delta logo]()
$695
This Delta deal was found by Cheapflights users on 9/5. 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.
Sat 10/102:00 pm -
1 stop17h 31m
Tue 10/207:50 pm -
1 stop13h 39m
Deal found 9/5![Delta logo]()
$695
This United Airlines deal was found by Cheapflights users on 9/5. 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 Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/38:00 am -
1 stop8h 30m
Sat 10/1011:23 am -
1 stop11h 14m
Deal found 9/5![United Airlines logo]()
$706
This Delta deal was found by Cheapflights users on 9/5. 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.
Sat 10/32:00 pm -
1 stop17h 35m
Thu 10/157:50 pm -
1 stop13h 39m
Deal found 9/5![Delta logo]()
$695
This Delta deal was found by Cheapflights users on 9/5. 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 10/76:00 am -
2 stops11h 58m
Wed 10/149:30 am -
2 stops12h 21m
Deal found 9/5![Delta logo]()
$710
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 September 9, 2026 and is based on user searches.
Discover last-minute flight deals from St. Louis to Pierre Elliott Trudeau Intl. Data last updated September 9, 2026 and is based on user searches.
This Air Canada deal was found by Cheapflights users on 9/8. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/3012:10 pm -
Nonstop2h 31m
Sun 10/48:10 am -
1 stop6h 50m
Deal found 9/8![Air Canada logo]()
$601
This American Airlines deal was found by Cheapflights users on 9/8. 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.
Fri 10/27:21 am -
1 stop8h 32m
Tue 10/65:34 pm -
1 stop18h 16m
Deal found 9/8![American Airlines logo]()
$537
This Kiwi.com deal was found by Cheapflights users on 9/5. 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.
Mon 10/52:29 pm -
2 stops15h 36m
Wed 10/147:00 am -
1 stop11h 40m
Deal found 9/5![Multiple Airlines logo]()
$620
This Mytrip deal was found by Cheapflights users on 9/9. 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.
Thu 10/82:00 pm -
3 stops30h 12m
Mon 10/128:35 am -
2 stops6h 25m
Deal found 9/9![Multiple Airlines logo]()
$577
This Air Canada deal was found by Cheapflights users on 9/9. 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 10/812:10 pm -
Nonstop2h 31m
Mon 10/124:55 pm -
Nonstop2h 46m
Deal found 9/9![Air Canada logo]()
$591
This Air Canada deal was found by Cheapflights users on 9/8. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/1512:10 pm -
Nonstop2h 31m
Wed 10/214:55 pm -
Nonstop2h 46m
Deal found 9/8![Air Canada logo]()
$588
This American Airlines deal was found by Cheapflights users on 9/8. 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.
Sat 10/175:23 pm -
1 stop17h 21m
Wed 10/215:34 pm -
1 stop18h 16m
Deal found 9/8![American Airlines logo]()
$458
This American Airlines deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/295:00 am -
1 stop10h 52m
Mon 11/212:10 pm -
1 stop12h 49m
Deal found 9/9![American Airlines logo]()
$562
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 September 9, 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 September 9, 2026.
This Kiwi.com deal was found by Cheapflights users on 9/4. 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.
Mon 9/282:29 pm -
3 stops28h 03m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/4![Multiple Airlines logo]()
$173
This Kiwi.com deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/196:35 pm -
3 stops22h 45m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/9![Multiple Airlines logo]()
$193
This American Airlines deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/175:23 pm -
1 stop17h 21m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/9![American Airlines logo]()
$205
This Kiwi.com deal was found by Cheapflights users on 9/9. 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 10/177:42 pm -
3 stops23h 48m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/9![Multiple Airlines logo]()
$212
This Kiwi.com deal was found by Cheapflights users on 9/4. 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 10/22:29 pm -
3 stops56h 56m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/4![Multiple Airlines logo]()
$223
This Kiwi.com deal was found by Cheapflights users on 9/6. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/166:35 pm -
3 stops23h 57m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/6![Multiple Airlines logo]()
$229
This Kiwi.com deal was found by Cheapflights users on 9/4. 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.
Sun 9/2010:20 am -
3 stops37h 05m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/4![Multiple Airlines logo]()
$243
This Kiwi.com deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/152:00 pm -
3 stops27h 12m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/9![Multiple Airlines logo]()
$244
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 September 9, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $458 (American Airlines) |
One-way from | $173 (Kiwi.com) |
Popular in | October |
Cheapest in | August |
Average price | $776 |
Good round-trip deal | $665 or less |
Good one-way deal | $359 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 7,457,451 searches. Data last updated September 9, 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 Lambert-St Louis - YUL Montreal Pierre Elliott Trudeau Intl
STLYUL
Lambert-St Louis
Thu 10/1
2:00 pm-6:12 pm
3 stops27h 12m
Montreal Pierre Elliott Trudeau Intl
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$253
St. LouisMontreal
STL Lambert-St Louis - YUL Montreal Pierre Elliott Trudeau Intl
STLYUL
Lambert-St Louis
Mon 10/19
5:31 pm-8:32 am
1 stop14h 01m
Montreal Pierre Elliott Trudeau Intl
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$269
St. LouisMontreal
STL Lambert-St Louis - YUL Montreal Pierre Elliott Trudeau Intl
STLYUL
Lambert-St Louis
Mon 9/28
5:18 pm-11:44 am
1 stop17h 26m
Montreal Pierre Elliott Trudeau Intl
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$274
St. LouisMontreal
STL Lambert-St Louis - YUL Montreal Pierre Elliott Trudeau Intl
STLYUL
Lambert-St Louis
Sat 10/17
4:30 pm-2:05 pm
2 stops20h 35m
Montreal Pierre Elliott Trudeau Intl
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$274
St. LouisMontreal
STL Lambert-St Louis - YUL Montreal Pierre Elliott Trudeau Intl
STLYUL
Lambert-St Louis
Wed 10/7
8:00 am-7:01 pm
1 stop10h 01m
Montreal Pierre Elliott Trudeau Intl
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$284
St. LouisMontreal
STL Lambert-St Louis - YUL Montreal Pierre Elliott Trudeau Intl
STLYUL
Lambert-St Louis
Fri 10/16
5:31 pm-8:32 am
1 stop14h 01m
Montreal Pierre Elliott Trudeau Intl
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$285
St. LouisMontreal
STL Lambert-St Louis - YUL Montreal Pierre Elliott Trudeau Intl
STLYUL
Lambert-St Louis
Sun 10/18
4:30 pm-9:12 pm
3 stops27h 42m
Montreal Pierre Elliott Trudeau Intl
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$296
St. LouisMontreal
STL Lambert-St Louis - YUL Montreal Pierre Elliott Trudeau Intl
STLYUL
Lambert-St Louis
Wed 10/7
6:00 am-6:58 pm
2 stops11h 58m
Montreal Pierre Elliott Trudeau Intl
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$297
Quickest round-trip
St. LouisMontreal
STL Lambert-St Louis - YUL Montreal Pierre Elliott Trudeau Intl
STLYUL
Lambert-St Louis
Wed 10/7
12:10 pm-3:41 pm
Nonstop2h 31m
Montreal Pierre Elliott Trudeau Intl
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$308
St. LouisMontreal
STL Lambert-St Louis - YUL Montreal Pierre Elliott Trudeau Intl
STLYUL
Lambert-St Louis
Wed 10/7
4:18 pm-9:52 am
1 stop16h 34m
Montreal Pierre Elliott Trudeau Intl
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$313
Showing 1-10 of 21 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 September.
| 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
Prices
Airlines
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 September 9, 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?
Airfare is below average for this route at the moment.
St. Louis to Montreal Pierre Elliott Trudeau Intl Airport flights typically cost between $725 and $1,385 in October.The cheapest round-trip price found within the last 5 days was $458 on American Airlines (Oct 17-Oct 21).
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 September 9, 2026.
Get a feel of what it's like to fly with United Airlines and Air Canada 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.
Comfort
7.3
Entertainment
7.1
Boarding
7.7
Food
6.7
Crew
8.1
Overall
7.4
Reviews
1 / 20
6.0
GoodMiz,Oct 2024
EWR - YYZ
Comfort
7.3
Entertainment
7.1
Boarding
7.7
Food
6.7
Crew
8.1
Overall
7.4
Reviews
1 / 20
6.0
GoodMiz,Oct 2024
EWR - YYZ
Comfort
7.3
Entertainment
7.1
Boarding
7.7
Food
6.7
Crew
8.1
Overall
7.4
Reviews
1 / 20
6.0
GoodMiz,Oct 2024
EWR - YYZ
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.
Traveling to a place near Montreal Pierre Elliott Trudeau Intl Airport?
Book flights to Montreal Pierre Elliott Trudeau Intl Airport if you plan to visit one of these locationsCornwall
Longueuil
Laval
Dorval
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St. Louis and Pierre Elliott Trudeau Intl flights
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Browse through other flights departing from St. Louis. Flights are based on user searches made on Cheapflights and were last updated on September 9, 2026.
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Top 2 airlines flying from St. Louis to Pierre Elliott Trudeau Intl
Discover the top 2 airlines that operate flights from St. Louis to Pierre Elliott Trudeau Intl. 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 September 9, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$257 | Average$665 | FlexibilityNo cancel fee | On-time67% | |
| Cheapest$296 | Average$759 | FlexibilityNo cancel fee | On-time69% |