Cheap Flights From Pierre Elliott Trudeau Intl. (YUL) To Lambert-St. Louis Intl. (STL)

Wander Wisely with exceptional service, 24/7 supportOpens in a new window

Feel at ease with free flight cancellations within 24 hours of booking

Change your flight without a fee on select flights

Find The Best Dates To Fly

Cheapest Flights from Montreal (YUL) to St. Louis (STL)

The cheapest flights to Lambert-St. Louis Intl. found within the past 7 days were CA $480 round trip and CA $360 one way. Prices and availability subject to change. Additional terms may apply.

Tue, Feb 24 - Tue, Mar 3
YUL
Montreal
STL
St. Louis
CA $480 Roundtrip, found 1 day ago
CA $480
Roundtrip
found 1 day ago
Select American Airlines flight, departing Tue, Feb 24 from Montreal to St. Louis, returning Tue, Mar 3, priced at CA $480 found 1 day ago
Tue, Feb 24 - Tue, Mar 3
YUL
Montreal
STL
St. Louis
CA $559 Roundtrip, found 1 day ago
CA $559
Roundtrip
found 1 day ago
Select American Airlines flight, departing Tue, Feb 24 from Montreal to St. Louis, returning Tue, Mar 3, priced at CA $559 found 1 day ago
Tue, Feb 24 - Tue, Mar 3
YUL
Montreal
STL
St. Louis
CA $635 Roundtrip, found 1 day ago
CA $635
Roundtrip
found 1 day ago
Select American Airlines flight, departing Tue, Feb 24 from Montreal to St. Louis, returning Tue, Mar 3, priced at CA $635 found 1 day ago
Tue, Feb 24 - Tue, Mar 3
YUL
Montreal
STL
St. Louis
CA $637 Roundtrip, found 1 day ago
CA $637
Roundtrip
found 1 day ago
Select Delta flight, departing Tue, Feb 24 from Montreal to St. Louis, returning Tue, Mar 3, priced at CA $637 found 1 day ago
Tue, Apr 7 - Fri, Apr 10
YUL
Montreal
STL
St. Louis
CA $640 Roundtrip, found 5 days ago
CA $640
Roundtrip
found 5 days ago
Select Delta flight, departing Tue, Apr 7 from Montreal to St. Louis, returning Fri, Apr 10, priced at CA $640 found 5 days ago
Tue, Feb 24 - Tue, Mar 3
YUL
Montreal
STL
St. Louis
CA $673 Roundtrip, found 1 day ago
CA $673
Roundtrip
found 1 day ago
Select American Airlines flight, departing Tue, Feb 24 from Montreal to St. Louis, returning Tue, Mar 3, priced at CA $673 found 1 day ago
Tue, Feb 24 - Tue, Mar 3
YUL
Montreal
STL
St. Louis
CA $684 Roundtrip, found 1 day ago
CA $684
Roundtrip
found 1 day ago
Select American Airlines flight, departing Tue, Feb 24 from Montreal to St. Louis, returning Tue, Mar 3, priced at CA $684 found 1 day ago
Wed, Mar 11 - Mon, Mar 16
YUL
Montreal
STL
St. Louis
CA $686 Roundtrip, found 3 days ago
CA $686
Roundtrip
found 3 days ago
Select Delta flight, departing Wed, Mar 11 from Montreal to St. Louis, returning Mon, Mar 16, priced at CA $686 found 3 days ago
Mon, Feb 16 - Sun, Feb 22
YUL
Montreal
STL
St. Louis
CA $705 Roundtrip, found 4 days ago
CA $705
Roundtrip
found 4 days ago
Select Delta flight, departing Mon, Feb 16 from Montreal to St. Louis, returning Sun, Feb 22, priced at CA $705 found 4 days ago
Tue, Feb 24 - Tue, Mar 3
YUL
Montreal
STL
St. Louis
CA $710 Roundtrip, found 1 day ago
CA $710
Roundtrip
found 1 day ago
Select Delta flight, departing Tue, Feb 24 from Montreal to St. Louis, returning Tue, Mar 3, priced at CA $710 found 1 day ago

Frequently asked questions

Are there direct flights from Montreal Airport to Lambert Field?
If you'd prefer to travel quickly from Montreal Airport to Lambert Field, have a look at United Airlines, Air Canada and American Airlines. No airlines provide direct flights on this route, so you'll have to make at least one stopover.
What airlines fly from YUL to Lambert Field?
Unfortunately, there are no airlines currently offering direct flights between Montreal Airport and St. Louis Lambert International Airport. It's in your best interest to plan well in advance to find the ideal price and route.
What is the best day to buy a plane ticket?
Airfares offered on Friday tend to be the cheapest, according to flight demand on Travelocity.ca in 2021. Purchasing your airfares on a Thursday or Saturday can also provide better value, however our advice if you're looking to save money is to avoid booking on a Wednesday or Sunday. Our data shows that those two days have the highest ticket values on average, so keep this in mind if you're browsing flight deals.
What are the cheapest days to fly?
Frequent travellers may already know this, but earlier in the week is often the cheapest time to fly. Flights departing on a Monday are the cheapest of the week. Since flights towards the middle of the week tend to be more popular, this causes the prices to rise. This is why, on average, airfares booked on Travelocity.ca in 2021 were most expensive for Wednesday departures.
How far in advance can you book a flight?
Here's the deal: It is typically possible to start comparing international airfares on Travelocity.ca up to 12 months in advance. However, it does depend on the carrier as not all airlines release their prices that far out. According to our 2021 flight demand trends, last minute planners can still bag a bargain with some of the cheapest fares appearing 2-4 weeks prior to their travel dates.*According to flight demand on Travelocity.ca from January to December 2021. Savings are subject to change and may vary depending on selections made.

Popular Flight Routes from Montreal (YUL)

Travelers at YUL love to visit these top cities. Roam to the top destinations from Montreal (YUL) today with the cheap prices from Travelocity!

Popular Flight Routes from St. Louis (STL)

Travelers at STL love to visit these top cities. Roam to the top destinations from St. Louis(STL) today with the cheap prices from Travelocity!

*Price based on the lowest price found within past 24 hours and based upon one night stay for two adults over the next thirty days. Prices and availability subject to change. Additional terms may apply.