$209+ Cheap flights from Pierre Elliott Trudeau Intl (YUL) to St. Louis (STL)
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 12/10. Fares are subject to change and may not be available on all flights or dates of travel.
YUL — STL
Nov 29 — Dec 61
Round-trip
1 adult, Economy
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Find cheap flights from Pierre Elliott Trudeau Intl to St. Louis 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 Pierre Elliott Trudeau Intl to St. Louis
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Cheapest flights from Pierre Elliott Trudeau Intl to St. LouisExplore the most affordable flight options available from Pierre Elliott Trudeau Intl to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 30, 2026.
Explore the most affordable flight options available from Pierre Elliott Trudeau Intl to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 30, 2026.
This American Airlines deal was found by Cheapflights users on 10/26. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/712:08 pm -
1 stop12h 54m
Wed 12/98:24 pm -
1 stop14h 04m
Deal found 10/26![American Airlines logo]()
$423
This American Airlines deal was found by Cheapflights users on 10/29. 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 12/81:04 pm -
2 stops11h 58m
Mon 12/148:24 pm -
1 stop14h 04m
Deal found 10/29![American Airlines logo]()
$432
This American Airlines deal was found by Cheapflights users on 10/27. 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 11/1912:10 pm -
1 stop8h 54m
Mon 11/235:29 pm -
1 stop16h 57m
Deal found 10/27![American Airlines logo]()
$447
This Mytrip deal was found by Cheapflights users on 10/29. 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.
Tue 12/84:40 pm -
3 stops19h 37m
Mon 12/1412:02 pm -
3 stops26h 58m
Deal found 10/29![Multiple Airlines logo]()
$478
This American Airlines deal was found by Cheapflights users on 10/27. 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.
Wed 11/1812:10 pm -
1 stop11h 05m
Sun 11/228:12 pm -
1 stop14h 14m
Deal found 10/27![American Airlines logo]()
$488
This American Airlines deal was found by Cheapflights users on 10/28. 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 11/1912:10 pm -
1 stop8h 54m
Sat 11/218:12 pm -
1 stop14h 14m
Deal found 10/28![American Airlines logo]()
$515
This American Airlines deal was found by Cheapflights users on 10/25. 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 11/1712:10 pm -
1 stop12h 49m
Sun 11/228:12 pm -
1 stop14h 14m
Deal found 10/25![American Airlines logo]()
$523
This Mytrip deal was found by Cheapflights users on 10/25. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/174:40 pm -
3 stops26h 02m
Sun 11/226:05 pm -
3 stops20h 55m
Deal found 10/25![Multiple Airlines logo]()
$524
This United Airlines deal was found by Cheapflights users on 10/28. 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 11/246:10 pm -
1 stop15h 45m
Fri 11/276:50 pm -
1 stop14h 27m
Deal found 10/28![United Airlines logo]()
$550
This United Airlines deal was found by Cheapflights users on 10/25. 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.
Mon 11/236:00 am -
1 stop10h 43m
Fri 11/276:00 am -
1 stop14h 17m
Deal found 10/25![United Airlines logo]()
$551
This Mytrip deal was found by Cheapflights users on 10/27. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/182:15 pm -
3 stops29h 24m
Sun 11/226:05 pm -
3 stops27h 05m
Deal found 10/27![Multiple Airlines logo]()
$565
Best flights from Pierre Elliott Trudeau Intl to St. LouisDiscover carefully curated flight deals from Pierre Elliott Trudeau Intl to St. Louis that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated October 30, 2026.
Discover carefully curated flight deals from Pierre Elliott Trudeau Intl to St. Louis that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated October 30, 2026.
This United Airlines deal was found by Cheapflights users on 10/28. 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 11/266:00 am -
1 stop10h 43m
Fri 11/277:30 am -
1 stop10h 32m
Deal found 10/28![United Airlines logo]()
$550
This American Airlines deal was found by Cheapflights users on 10/28. 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 11/1912:10 pm -
1 stop8h 54m
Mon 11/236:02 am -
1 stop8h 24m
Deal found 10/28![American Airlines logo]()
$571
This Mytrip deal was found by Cheapflights users on 10/27. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/198:05 am -
2 stops11h 34m
Mon 11/236:35 pm -
3 stops20h 25m
Deal found 10/27![Multiple Airlines logo]()
$572
This United Airlines deal was found by Cheapflights users on 10/25. 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.
Fri 11/276:00 am -
1 stop9h 34m
Fri 11/276:50 pm -
1 stop14h 27m
Deal found 10/25![United Airlines logo]()
$551
This United Airlines deal was found by Cheapflights users on 10/27. 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 11/181:05 pm -
2 stops11h 19m
Sun 11/226:00 am -
1 stop12h 02m
Deal found 10/27![United Airlines logo]()
$570
This United Airlines deal was found by Cheapflights users on 10/27. 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.
Fri 11/209:25 am -
1 stop13h 15m
Sat 11/216:00 am -
1 stop10h 07m
Deal found 10/27![United Airlines logo]()
$598
This United Airlines deal was found by Cheapflights users on 10/27. 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.
Tue 2/21:10 pm -
1 stop9h 27m
Wed 2/37:29 am -
1 stop8h 38m
Deal found 10/27![United Airlines logo]()
$613
This United Airlines deal was found by Cheapflights users on 10/26. 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.
Tue 1/191:10 pm -
1 stop11h 10m
Sat 1/239:05 am -
2 stops11h 37m
Deal found 10/26![United Airlines logo]()
$614
Last-minute flights from Pierre Elliott Trudeau Intl to St. LouisDiscover last-minute flight deals from Pierre Elliott Trudeau Intl to St. Louis. Data last updated October 30, 2026 and is based on user searches.
Discover last-minute flight deals from Pierre Elliott Trudeau Intl to St. Louis. Data last updated October 30, 2026 and is based on user searches.
This American Airlines deal was found by Cheapflights users on 10/25. 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 11/1712:10 pm -
1 stop12h 49m
Sun 11/228:12 pm -
1 stop14h 14m
Deal found 10/25![American Airlines logo]()
$523
This Mytrip deal was found by Cheapflights users on 10/25. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/174:40 pm -
3 stops26h 02m
Sun 11/226:05 pm -
3 stops20h 55m
Deal found 10/25![Multiple Airlines logo]()
$524
This American Airlines deal was found by Cheapflights users on 10/27. 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.
Wed 11/1812:10 pm -
1 stop11h 05m
Sun 11/228:12 pm -
1 stop14h 14m
Deal found 10/27![American Airlines logo]()
$488
This Mytrip deal was found by Cheapflights users on 10/27. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/182:15 pm -
3 stops29h 24m
Sun 11/226:05 pm -
3 stops27h 05m
Deal found 10/27![Multiple Airlines logo]()
$565
This United Airlines deal was found by Cheapflights users on 10/27. 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 11/181:05 pm -
2 stops11h 19m
Sun 11/226:00 am -
1 stop12h 02m
Deal found 10/27![United Airlines logo]()
$570
This American Airlines deal was found by Cheapflights users on 10/27. 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 11/1912:10 pm -
1 stop8h 54m
Mon 11/235:29 pm -
1 stop16h 57m
Deal found 10/27![American Airlines logo]()
$447
This American Airlines deal was found by Cheapflights users on 10/28. 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 11/1912:10 pm -
1 stop8h 54m
Sat 11/218:12 pm -
1 stop14h 14m
Deal found 10/28![American Airlines logo]()
$515
This Mytrip deal was found by Cheapflights users on 10/27. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/198:05 am -
2 stops11h 34m
Mon 11/236:35 pm -
3 stops20h 25m
Deal found 10/27![Multiple Airlines logo]()
$572
This United Airlines deal was found by Cheapflights users on 10/25. 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.
Mon 11/236:00 am -
1 stop10h 43m
Fri 11/276:00 am -
1 stop14h 17m
Deal found 10/25![United Airlines logo]()
$551
This American Airlines deal was found by Cheapflights users on 10/26. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/2312:10 pm -
1 stop8h 40m
Mon 11/308:12 pm -
1 stop14h 14m
Deal found 10/26![American Airlines logo]()
$576
This United Airlines deal was found by Cheapflights users on 10/28. 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 11/246:10 pm -
1 stop15h 45m
Fri 11/276:50 pm -
1 stop14h 27m
Deal found 10/28![United Airlines logo]()
$550
One-way flights from Pierre Elliott Trudeau Intl to St. LouisSearch for one-way flight options from Pierre Elliott Trudeau Intl to St. Louis. Find affordable one-way fares based on user searches. Data last updated October 30, 2026.
Search for one-way flight options from Pierre Elliott Trudeau Intl to St. Louis. Find affordable one-way fares based on user searches. Data last updated October 30, 2026.
This American Airlines deal was found by Cheapflights users on 10/26. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/1012:08 pm -
1 stop8h 50m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/26![American Airlines logo]()
$209
This Kiwi.com deal was found by Cheapflights users on 10/26. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/104:40 pm -
3 stops19h 37m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/26![Multiple Airlines logo]()
$222
This American Airlines deal was found by Cheapflights users on 10/27. 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.
Fri 12/1112:08 pm -
1 stop12h 54m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/27![American Airlines logo]()
$244
This Kiwi.com deal was found by Cheapflights users on 10/30. 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 12/149:45 am -
3 stops39h 27m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/30![Multiple Airlines logo]()
$262
This American Airlines deal was found by Cheapflights users on 10/29. 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 11/2412:10 pm -
1 stop8h 40m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/29![American Airlines logo]()
$266
This American Airlines deal was found by Cheapflights users on 10/28. 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 1/2312:13 pm -
1 stop12h 44m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/28![American Airlines logo]()
$271
This Kiwi.com deal was found by Cheapflights users on 10/29. 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 11/249:45 am -
3 stops28h 46m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/29![Multiple Airlines logo]()
$288
This Kiwi.com deal was found by Cheapflights users on 10/27. 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.
Fri 12/112:15 pm -
3 stops34h 57m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/27![Multiple Airlines logo]()
$289
This Delta deal was found by Cheapflights users on 10/27. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/117:44 pm -
2 stops16h 45m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/27![Delta logo]()
$292
This Kiwi.com deal was found by Cheapflights users on 10/28. 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 12/319:45 am -
3 stops28h 36m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/28![Multiple Airlines logo]()
$294
Find flight deals from Pierre Elliott Trudeau Intl to St. Louis
Discover tips and strategies to find the most affordable flight options for your journey from Pierre Elliott Trudeau Intl (YUL) to St. Louis (STL). 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 October 30, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $423 (American Airlines) |
One-way from | $209 (American Airlines) |
Popular in | January |
Cheapest in | August |
Average price | $829 |
Cheapflights Fare Finder
Customize your flight search to find flights from Pierre Elliott Trudeau Intl to St. Louis 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 October 30, 2026.
Use the filters below to find and compare flights from Montreal Pierre Elliott Trudeau Intl Airport to St. Louis that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
MontrealSt. Louis
YUL Montreal Pierre Elliott Trudeau Intl - STL Lambert-St Louis
YULSTL
Montreal Pierre Elliott Trudeau Intl
Thu 12/10
12:08 pm-7:58 pm
1 stop8h 50m
Lambert-St Louis
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$209
MontrealSt. Louis
YUL Montreal Pierre Elliott Trudeau Intl - STL Lambert-St Louis
YULSTL
Montreal Pierre Elliott Trudeau Intl
Thu 12/10
4:40 pm-11:17 am
3 stops19h 37m
Lambert-St Louis
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$222
MontrealSt. Louis
YUL Montreal Pierre Elliott Trudeau Intl - STL Lambert-St Louis
YULSTL
Montreal Pierre Elliott Trudeau Intl
Fri 12/11
12:08 pm-12:02 am
1 stop12h 54m
Lambert-St Louis
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$244
MontrealSt. Louis
YUL Montreal Pierre Elliott Trudeau Intl - STL Lambert-St Louis
YULSTL
Montreal Pierre Elliott Trudeau Intl
Mon 12/14
9:45 am-12:12 am
3 stops39h 27m
Lambert-St Louis
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$262
Quickest round-trip
MontrealSt. Louis
YUL Montreal Pierre Elliott Trudeau Intl - STL Lambert-St Louis
YULSTL
Montreal Pierre Elliott Trudeau Intl
Tue 11/24
12:10 pm-7:50 pm
1 stop8h 40m
Lambert-St Louis
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$266
MontrealSt. Louis
YUL Montreal Pierre Elliott Trudeau Intl - STL Lambert-St Louis
YULSTL
Montreal Pierre Elliott Trudeau Intl
Sat 1/23
1:00 pm-11:57 pm
2 stops11h 57m
Lambert-St Louis
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$287
MontrealSt. Louis
YUL Montreal Pierre Elliott Trudeau Intl - STL Lambert-St Louis
YULSTL
Montreal Pierre Elliott Trudeau Intl
Tue 11/24
9:45 am-1:31 pm
3 stops28h 46m
Lambert-St Louis
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$288
MontrealSt. Louis
YUL Montreal Pierre Elliott Trudeau Intl - STL Lambert-St Louis
YULSTL
Montreal Pierre Elliott Trudeau Intl
Fri 12/11
7:44 pm-11:29 am
2 stops16h 45m
Lambert-St Louis
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$292
MontrealSt. Louis
YUL Montreal Pierre Elliott Trudeau Intl - STL Lambert-St Louis
YULSTL
Montreal Pierre Elliott Trudeau Intl
Fri 1/22
8:00 am-12:04 am
3 stops17h 04m
Lambert-St Louis
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$295
MontrealSt. Louis
YUL Montreal Pierre Elliott Trudeau Intl - STL Lambert-St Louis
YULSTL
Montreal Pierre Elliott Trudeau Intl
Mon 11/16
6:45 am-1:31 pm
3 stops31h 46m
Lambert-St Louis
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$298
Showing 1-10 of 19 resultsSorted by cheapest first
Compare providers for flights from Pierre Elliott Trudeau Intl to St. Louis
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 Pierre Elliott Trudeau Intl to St. Louis in October.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy2 stars | Trust Score*3 stars |
- Most accurate provider: When it comes to deals on Montreal Pierre Elliott Trudeau Intl Airport-St. Louis flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Montreal Pierre Elliott Trudeau Intl Airport-St. Louis flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Montreal Pierre Elliott Trudeau Intl Airport-St. Louis flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Montreal Pierre Elliott Trudeau Intl Airport-St. Louis 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 Montreal Pierre Elliott Trudeau Intl Airport-St. Louis 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 Pierre Elliott Trudeau Intl to St. Louis
Have a flexible travel schedule? Discover the best time to fly to St. Louis from Pierre Elliott Trudeau Intl with our price prediction graph.
YUL-STL
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 Montreal Pierre Elliott Trudeau Intl Airport to St. Louis
What is the cheapest month to book a flight from Montreal Pierre Elliott Trudeau Intl Airport to St. Louis?
Currently, August is the cheapest month in which you can book a flight from Montreal Pierre Elliott Trudeau Intl Airport to St. Louis (average of $442). Flying from Montreal Pierre Elliott Trudeau Intl Airport to St. Louis in January is currently the most expensive (average of $889). 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 YUL to STL?
Find hourly flight availability from Pierre Elliott Trudeau Intl to St. Louis. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated October 30, 2026.
Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Montreal Pierre Elliott Trudeau Intl Airport to St. Louis as you normally would.
The best insider tips for Montreal Pierre Elliott Trudeau Intl Airport to St. Louis flights
AI-powered summary based on content written by travel experts. AI can make mistakes.
Cheapflights partnered with top experts to bring you the best recommendations for your Montreal Pierre Elliott Trudeau Intl Airport to St. Louis trip
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Reviews of airlines servicing St. Louis
Get insights into the airlines that provide service to St. Louis. 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 St. Louis. Reviews last updated October 30, 2026.
Peruse reviews from past customers who have flown with Air Canada from Montreal Pierre Elliott Trudeau Intl Airport to St. Louis to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Entertainment
6.8
Boarding
7.3
Overall
7.1
Comfort
7.1
Crew
7.8
Food
6.3
Reviews
1 / 20
8.0
ExcellentMicheline,Aug 2026
YUL - LAX
Entertainment
6.8
Boarding
7.3
Overall
7.1
Comfort
7.1
Crew
7.8
Food
6.3
Reviews
1 / 20
8.0
ExcellentMicheline,Aug 2026
YUL - LAX
Related info for your journey
Find useful and relevant information for your journey from Pierre Elliott Trudeau Intl to St. Louis. 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 St. Louis?
Book flights to St. Louis if you plan to visit one of these locationsFairview Heights
O'Fallon
Fenton
Swansea
Eureka
Wentzville
Maryland Heights
Chesterfield
Collinsville
Edwardsville
Glencoe
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Top airline flying from Pierre Elliott Trudeau Intl to St. Louis
Discover the top airline that operate flights from Pierre Elliott Trudeau Intl to St. Louis. 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 October 30, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$478 | Average$567 | FlexibilityNo cancel fee | On-time67% |