Find cheap flights from St. Louis to Montreal Trudeau Airport

STL - YUL

Find cheap flights from St. Louis to Montreal Trudeau Airport

Round-trip
Economy
St. Louis (STL)
Montreal Pierre Elliott Trudeau Intl
Sun. 9/8
Sun. 16/8
Any month
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Good to know

Low season

April Best time to beat the crowds (26% less expensive on average)

High season

June Most popular time to fly (22% more expensive on average)

Average price of a round-trip

C$ 269 (avg. price over the last 2 weeks)

Good deal for a round-trip

C$ 248 or less

When to book flights from St. Louis to Montreal Pierre Elliott Trudeau Intl

Estimated round-trip price
Average price per month
Flight prices as travel date approaches
-1 day
-2 days

Top tips for finding a cheap flight

  • Looking for a cheap flight? 25% of our users found flights on this route for C$ 208 or less.
  • The cheapest flight from St. Louis to Montreal Trudeau Airport was found, on average, 86 days before departure.
  • Book at least 3 weeks before departure in order to get a below-average price.
  • High season is considered to be May, June and July. The cheapest month to fly is April.
*Average of the lowest prices shown in KAYAK’s search results for departures within the next 30 days

FAQs for booking St. Louis to Montreal Trudeau Airport flights

How long does a flight from St. Louis to Montreal Trudeau Airport take?

Which airlines provide the cheapest flights from St. Louis to Montreal Trudeau Airport?

What’s the cheapest day of the week to fly from St. Louis to Montreal Trudeau Airport?

How does KAYAK find such low prices on flights from St. Louis to Montreal Trudeau Airport?

How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from St. Louis to Montreal Trudeau Airport?

What is the Hacker Fare option on flights from St. Louis to Montreal Trudeau Airport?

What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from St. Louis to Montreal Trudeau Airport?

Top 5 airlines serving Lambert-St Louis to Montreal Pierre Elliott Trudeau Intl

Scores according to KAYAK customer reviews

8.7
Korean Air
Overall score based on 4,930 reviews
8.8
Boarding
8.6
Comfort
9.0
Crew
8.5
Entertainment
8.4
Food
Airline reviews
Read more about Korean Air

Book cheap flights from St. Louis to Montreal Trudeau Airport

Recent round-trip flight deals

6/11
Fri.
1 stop
British Airways
5h 40m
STL - YUL
9/11
Mon.
1 stop
British Airways
9h 06m
YUL - STL
6/11
Fri.
1 stop
Austrian Airlines
6h 04m
STL - YUL
9/11
Mon.
1 stop
Austrian Airlines
6h 09m
YUL - STL
6/11
Fri.
1 stop
EVA Air
5h 49m
STL - YUL
9/11
Mon.
1 stop
EVA Air
5h 14m
YUL - STL
3/1
Sun.
1 stop
Lufthansa
4h 46m
STL - YUL
17/1
Sun.
1 stop
Lufthansa
7h 50m
YUL - STL
3/1
Sun.
1 stop
Korean Air
4h 34m
STL - YUL
17/1
Sun.
1 stop
Korean Air
7h 35m
YUL - STL
3/1
Sun.
1 stop
SAS
4h 46m
STL - YUL
17/1
Sun.
2 stops
SAS
9h 39m
YUL - STL
6/11
Fri.
1 stop
Delta
5h 06m
STL - YUL
9/11
Mon.
1 stop
Delta
8h 27m
YUL - STL
3/1
Sun.
1 stop
EVA Air
5h 49m
STL - YUL
17/1
Sun.
1 stop
EVA Air
7h 45m
YUL - STL
3/1
Sun.
1 stop
EVA Air
5h 49m
STL - YUL
17/1
Sun.
1 stop
EVA Air
5h 09m
YUL - STL
3/1
Sun.
1 stop
Aeromexico
5h 37m
STL - YUL
17/1
Sun.
1 stop
Aeromexico
6h 37m
YUL - STL
3/1
Sun.
2 stops
Korean Air
8h 06m
STL - YUL
17/1
Sun.
1 stop
Korean Air
7h 35m
YUL - STL
3/1
Sun.
1 stop
Delta
4h 34m
STL - YUL
17/1
Sun.
1 stop
Delta
7h 35m
YUL - STL
6/11
Fri.
1 stop
Korean Air
6h 10m
STL - YUL
9/11
Mon.
1 stop
Korean Air
6h 56m
YUL - STL
3/1
Sun.
1 stop
Delta
4h 34m
STL - YUL
17/1
Sun.
1 stop
Delta
7h 03m
YUL - STL
6/11
Fri.
1 stop
Delta
7h 37m
STL - YUL
9/11
Mon.
1 stop
Delta
6h 17m
YUL - STL
3/1
Sun.
1 stop
Delta
6h 33m
STL - YUL
17/1
Sun.
1 stop
Delta
7h 02m
YUL - STL
3/1
Sun.
2 stops
Delta
8h 08m
STL - YUL
17/1
Sun.
2 stops
Delta
8h 55m
YUL - STL
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*
Prices are per person, are for e–tickets and include all taxes & fees in CAD.

We attempt to get accurate prices, however, prices are not guaranteed.

Here's why:

We’re not the seller.
At KAYAK we don’t set the prices, so it’s not possible for us to guarantee what other companies are selling.

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Our service lets you quickly and easily compare results from hundreds of travel sites at once. In this sense, KAYAK is a search engine and we can't guarantee prices we find.

Why aren’t prices accurate 100% of the time?
Prices on airline seats, hotel rooms and car rentals can change frequently. Several people may also be trying to buy the same travel option simultaneously. As a result, you may find, on occasion, that certain prices are no longer available.

If you have more questions or if you have a bad price to report to us,
please send us an and someone from our team will get back to you promptly.

^
The fares displayed include all taxes and fees for economy class travel and were found by the provider in the last 72 hours. Seats are limited and may not be available on all flights and days. Fares are subject to change and may not be available on all flights or dates of travel. Some carriers charge additional fees for extra checked bags. Please check the carriers' sites.
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