$205+ 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 7/10. Fares are subject to change and may not be available on all flights or dates of travel.
STL — YUL
Jul 12 — Jul 191
Round-trip
1 adult, Economy
We work with more than 300 partners to bring you better travel deals
Find cheap flights from St. Louis to 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
Cheapest
Best
Last-minute
One-way
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 June 12, 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 June 12, 2026.
This Air Canada deal was found by Cheapflights users on 6/8. 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.
Sat 7/412:10 pm
STL
- YUL
Nonstop2h 32m
Air Canada
Fri 7/104:55 pm
YUL
- STL
Nonstop2h 47m
Air Canada
Deal found 6/8![Air Canada logo]()
$505
This Kiwi.com deal was found by Cheapflights users on 6/8. 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.
Sat 7/45:06 pm
STL
- YUL
2 stops24h 09m
Multiple Airlines
Fri 7/106:47 pm
YUL
- STL
1 stop6h 06m
Multiple Airlines
Deal found 6/8![Multiple Airlines logo]()
$525
This Kiwi.com deal was found by Cheapflights users on 6/9. 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.
Fri 8/74:57 pm
STL
- YUL
2 stops24h 18m
Multiple Airlines
Fri 8/146:47 pm
YUL
- STL
1 stop15h 33m
Multiple Airlines
Deal found 6/9![Multiple Airlines logo]()
$526
This Kiwi.com deal was found by Cheapflights users on 6/8. 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 8/186:33 pm
STL
- YUL
2 stops22h 42m
Multiple Airlines
Fri 8/212:29 pm
YUL
- STL
1 stop7h 02m
Multiple Airlines
Deal found 6/8![Multiple Airlines logo]()
$528
This Kiwi.com deal was found by Cheapflights users on 6/9. 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.
Tue 7/216:34 pm
STL
- YUL
2 stops22h 41m
Multiple Airlines
Fri 7/249:30 am
YUL
- STL
1 stop12h 05m
Multiple Airlines
Deal found 6/9![Multiple Airlines logo]()
$530
This American Airlines deal was found by Cheapflights users on 6/11. 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 9/165:00 am
STL
- YUL
1 stop10h 53m
American Airlines
Wed 9/2312:31 pm
YUL
- STL
1 stop9h 13m
American Airlines
Deal found 6/11![American Airlines logo]()
$532
This Kiwi.com deal was found by Cheapflights users on 6/10. 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 7/45:06 pm
STL
- YUL
2 stops24h 09m
Multiple Airlines
Mon 7/136:47 pm
YUL
- STL
1 stop6h 06m
Multiple Airlines
Deal found 6/10![Multiple Airlines logo]()
$533
This Kiwi.com deal was found by Cheapflights users on 6/9. 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 8/34:57 pm
STL
- YUL
2 stops44h 11m
Multiple Airlines
Wed 8/127:44 pm
YUL
- STL
1 stop25h 47m
Multiple Airlines
Deal found 6/9![Multiple Airlines logo]()
$537
This Kiwi.com deal was found by Cheapflights users on 6/9. 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.
Tue 8/46:34 pm
STL
- YUL
2 stops23h 44m
Multiple Airlines
Thu 8/135:10 pm
YUL
- STL
1 stop4h 32m
Multiple Airlines
Deal found 6/9![Multiple Airlines logo]()
$539
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 June 12, 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 June 12, 2026.
This Delta deal was found by Cheapflights users on 6/10. 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 9/176:00 am
STL
- YUL
2 stops11h 53m
Delta
Mon 9/217:43 pm
YUL
- STL
1 stop13h 24m
Delta
Deal found 6/10![Delta logo]()
$615
This United deal was found by Cheapflights users on 6/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/168:50 am
STL
- YUL
1 stop7h 40m
Multiple Airlines
Wed 9/234:55 pm
YUL
- STL
Nonstop2h 46m
Multiple Airlines
Deal found 6/12![Multiple Airlines logo]()
$617
This United Airlines deal was found by Cheapflights users on 6/8. 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.
Sat 9/512:59 pm
STL
- YUL
1 stop7h 27m
United Airlines
Wed 9/94:55 pm
YUL
- STL
Nonstop2h 46m
United Airlines
Deal found 6/8![United Airlines logo]()
$617
This Delta deal was found by Cheapflights users on 6/10. 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 9/136:45 am
STL
- YUL
1 stop4h 31m
Delta
Wed 9/232:25 pm
YUL
- STL
1 stop6h 41m
Delta
Deal found 6/10![Delta logo]()
$632
This Kiwi.com deal was found by Cheapflights users on 6/7. 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.
Wed 8/124:57 pm
STL
- YUL
2 stops20h 11m
Multiple Airlines
Sun 8/166:47 pm
YUL
- STL
1 stop15h 10m
Multiple Airlines
Deal found 6/7![Multiple Airlines logo]()
$640
This United Airlines deal was found by Cheapflights users on 6/9. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/291:13 pm
STL
- YUL
1 stop7h 13m
United Airlines
Wed 7/84:55 pm
YUL
- STL
Nonstop2h 47m
United Airlines
Deal found 6/9![United Airlines logo]()
$647
This Kiwi.com deal was found by Cheapflights users on 6/7. 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 9/1410:35 am
STL
- YUL
2 stops26h 33m
Multiple Airlines
Fri 9/186:47 pm
YUL
- STL
1 stop5h 49m
Multiple Airlines
Deal found 6/7![Multiple Airlines logo]()
$643
This Delta deal was found by Cheapflights users on 6/8. 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.
Sun 8/167:00 am
STL
- YUL
1 stop9h 42m
Delta
Wed 8/199:30 am
YUL
- STL
2 stops12h 12m
Delta
Deal found 6/8![Delta logo]()
$653
This United deal was found by Cheapflights users on 6/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/110:20 am
STL
- YUL
1 stop6h 10m
Multiple Airlines
Wed 7/84:55 pm
YUL
- STL
Nonstop2h 47m
Multiple Airlines
Deal found 6/12![Multiple Airlines logo]()
$647
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 June 12, 2026 and is based on user searches.
Discover last-minute flight deals from St. Louis to Pierre Elliott Trudeau Intl. Data last updated June 12, 2026 and is based on user searches.
This Gotogate deal was found by Cheapflights users on 6/10. 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 6/261:20 pm
STL
- YUL
Nonstop2h 35m
Air Canada
Sun 6/286:30 pm
YUL
- STL
Nonstop2h 55m
Air Canada
Deal found 6/10![Air Canada logo]()
$569
This Kiwi.com deal was found by Cheapflights users on 6/8. 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 6/295:06 pm
STL
- YUL
2 stops25h 07m
Multiple Airlines
Tue 7/146:47 pm
YUL
- STL
1 stop6h 06m
Multiple Airlines
Deal found 6/8![Multiple Airlines logo]()
$541
This Kiwi.com deal was found by Cheapflights users on 6/9. 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 6/295:06 pm
STL
- YUL
2 stops25h 07m
Multiple Airlines
Wed 7/87:00 am
YUL
- STL
1 stop6h 17m
Multiple Airlines
Deal found 6/9![Multiple Airlines logo]()
$553
This Air Canada deal was found by Cheapflights users on 6/8. 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.
Sat 7/412:10 pm
STL
- YUL
Nonstop2h 32m
Air Canada
Fri 7/104:55 pm
YUL
- STL
Nonstop2h 47m
Air Canada
Deal found 6/8![Air Canada logo]()
$505
This Kiwi.com deal was found by Cheapflights users on 6/8. 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.
Sat 7/45:06 pm
STL
- YUL
2 stops24h 09m
Multiple Airlines
Fri 7/106:47 pm
YUL
- STL
1 stop6h 06m
Multiple Airlines
Deal found 6/8![Multiple Airlines logo]()
$525
This Kiwi.com deal was found by Cheapflights users on 6/10. 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 7/45:06 pm
STL
- YUL
2 stops24h 09m
Multiple Airlines
Mon 7/136:47 pm
YUL
- STL
1 stop6h 06m
Multiple Airlines
Deal found 6/10![Multiple Airlines logo]()
$533
This Kiwi.com deal was found by Cheapflights users on 6/8. 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 7/84:57 pm
STL
- YUL
2 stops20h 11m
Multiple Airlines
Wed 7/156:47 pm
YUL
- STL
1 stop15h 56m
Multiple Airlines
Deal found 6/8![Multiple Airlines logo]()
$563
This Kiwi.com deal was found by Cheapflights users on 6/9. 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.
Tue 7/216:34 pm
STL
- YUL
2 stops22h 41m
Multiple Airlines
Fri 7/249:30 am
YUL
- STL
1 stop12h 05m
Multiple Airlines
Deal found 6/9![Multiple Airlines logo]()
$530
This Gotogate deal was found by Cheapflights users on 6/9. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/248:55 am
STL
- YUL
1 stop6h 27m
Air Canada
Fri 7/3110:10 am
YUL
- STL
1 stop4h 52m
Air Canada
Deal found 6/9![Air Canada logo]()
$554
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 June 12, 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 June 12, 2026.
This Kiwi.com deal was found by Cheapflights users on 6/9. 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.
Fri 7/104:57 pm
STL
- YUL
3 stops24h 13m
Multiple Airlines
Deal found 6/9![Multiple Airlines logo]()
$205
This Kiwi.com deal was found by Cheapflights users on 6/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/204:57 pm
STL
- YUL
2 stops24h 18m
Multiple Airlines
Deal found 6/12![Multiple Airlines logo]()
$207
This Kiwi.com deal was found by Cheapflights users on 6/8. 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 7/64:57 pm
STL
- YUL
2 stops24h 18m
Multiple Airlines
Deal found 6/8![Multiple Airlines logo]()
$208
This Kiwi.com deal was found by Cheapflights users on 6/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/196:34 pm
STL
- YUL
3 stops40h 36m
Multiple Airlines
Deal found 6/12![Multiple Airlines logo]()
$219
This Air Canada deal was found by Cheapflights users on 6/9. 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.
Fri 8/2112:10 pm
STL
- YUL
Nonstop2h 32m
Air Canada
Deal found 6/9![Air Canada logo]()
$227
This Kiwi.com deal was found by Cheapflights users on 6/11. 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 9/2810:35 am
STL
- YUL
3 stops32h 35m
Multiple Airlines
Deal found 6/11![Multiple Airlines logo]()
$232
This United Airlines deal was found by Cheapflights users on 6/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/78:00 am
STL
- YUL
1 stop10h 01m
United Airlines
Deal found 6/12![United Airlines logo]()
$246
This Kiwi.com deal was found by Cheapflights users on 6/9. 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.
Fri 8/215:33 pm
STL
- YUL
2 stops23h 42m
Multiple Airlines
Deal found 6/9![Multiple Airlines logo]()
$247
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 June 12, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $505 (Air Canada) |
One-way from | $205 (Kiwi.com) |
Popular in | October |
Cheapest in | August |
Average price | $766 |
Good round-trip deal | $1,001 or less |
Good one-way deal | $403 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 June 12, 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
Thu 9/17
6:00 am-6:53 pm
2 stops11h 53m
Montreal Pierre Elliott Trudeau Intl
Mon 9/21
7:43 pm-8:07 am
1 stop13h 24m
$615
St. LouisMontreal
STL - YUL
STLYUL
Lambert-St Louis
Wed 9/16
8:50 am-5:30 pm
1 stop7h 40m
Montreal Pierre Elliott Trudeau Intl
Wed 9/23
4:55 pm-6:41 pm
Nonstop2h 46m
$617
St. LouisMontreal
STL - YUL
STLYUL
Lambert-St Louis
Sat 9/5
12:59 pm-9:26 pm
1 stop7h 27m
Montreal Pierre Elliott Trudeau Intl
Wed 9/9
4:55 pm-6:41 pm
Nonstop2h 46m
$617
St. LouisMontreal
STL - YUL
STLYUL
Lambert-St Louis
Sun 9/13
6:45 am-12:16 pm
1 stop4h 31m
Montreal Pierre Elliott Trudeau Intl
Wed 9/23
2:25 pm-8:06 pm
1 stop6h 41m
$632
St. LouisMontreal
STL - YUL
STLYUL
Lambert-St Louis
Wed 8/12
4:57 pm-2:08 pm
2 stops20h 11m
Montreal Pierre Elliott Trudeau Intl
Sun 8/16
6:47 pm-8:57 am
1 stop15h 10m
$640
St. LouisMontreal
STL - YUL
STLYUL
Lambert-St Louis
Mon 9/14
10:35 am-2:08 pm
2 stops26h 33m
Montreal Pierre Elliott Trudeau Intl
Fri 9/18
6:47 pm-11:36 pm
1 stop5h 49m
$643
St. LouisMontreal
STL - YUL
STLYUL
Lambert-St Louis
Mon 6/29
1:13 pm-9:26 pm
1 stop7h 13m
Montreal Pierre Elliott Trudeau Intl
Wed 7/8
4:55 pm-6:42 pm
Nonstop2h 47m
$647
Quickest round-trip
St. LouisMontreal
STL - YUL
STLYUL
Lambert-St Louis
Wed 7/1
10:20 am-5:30 pm
1 stop6h 10m
Montreal Pierre Elliott Trudeau Intl
Wed 7/8
4:55 pm-6:42 pm
Nonstop2h 47m
$647
St. LouisMontreal
STL - YUL
STLYUL
Lambert-St Louis
Sun 8/16
7:00 am-5:42 pm
1 stop9h 42m
Montreal Pierre Elliott Trudeau Intl
Wed 8/19
9:30 am-8:42 pm
2 stops12h 12m
$653
Cheapest one-way
St. LouisMontreal
STL - YUL
STLYUL
Lambert-St Louis
Mon 7/6
4:57 pm-6:15 pm
2 stops24h 18m
$208
Showing 1-10 of 18 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 June.
| 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 June 12, 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 June 12, 2026.
Get a feel of what it's like to fly with United Airlines,American Airlines, andAir 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.
Overall
7.4
Boarding
7.7
Comfort
7.3
Entertainment
7.1
Food
6.6
Crew
8.1
Reviews
1 / 20
4.0
OkayDynasty,May 2026
LAX - EWR
Overall
7.4
Boarding
7.7
Comfort
7.3
Entertainment
7.1
Food
6.6
Crew
8.1
Reviews
1 / 20
4.0
OkayDynasty,May 2026
LAX - EWR
Overall
7.4
Boarding
7.7
Comfort
7.3
Entertainment
7.1
Food
6.6
Crew
8.1
Reviews
1 / 20
4.0
OkayDynasty,May 2026
LAX - EWR
Overall
7.4
Boarding
7.7
Comfort
7.3
Entertainment
7.1
Food
6.6
Crew
8.1
Reviews
1 / 20
4.0
OkayDynasty,May 2026
LAX - EWR
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 locationsLongueuil
Laval
Dorval
Browse thousands of different options on Cheapflights for your next trip
Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.
Alternative routes
Complete your trip
Flights by cabin class
Other flight options
Other flights from St. Louis
Pierre Elliott Trudeau Intl flight routes
Popular flights
Alternative routes for St. Louis to Pierre Elliott Trudeau Intl
See prices for flight routes from nearby airports that may be better suited for you.
Complete your trip
Complete your trip to Pierre Elliott Trudeau Intl by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from St. Louis to Pierre Elliott Trudeau Intl by cabin class
Find flights from St. Louis to Pierre Elliott Trudeau Intl, based on your preferred cabin class, be it economy, premium economy, business, or first class.
St. Louis and Pierre Elliott Trudeau Intl flights
Browse other St. Louis and Pierre Elliott Trudeau Intl flight options. Last updated on June 12, 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 June 12, 2026.
Other flights to Pierre Elliott Trudeau Intl
Explore flights to Pierre Elliott Trudeau Intl departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on June 12, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Top 3 airlines flying from St. Louis to Pierre Elliott Trudeau Intl
Discover the top 3 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 2,558,603 searches. Data last updated June 12, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$257 | Average$624 | FlexibilityNo cancel fee | On-time67% | |
| Cheapest$296 | Average$759 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$348 | Average$617 | FlexibilityNo cancel fee | On-time71% |