Find cheap flights from Montreal Trudeau Airport to St. Louis

YUL - STL

Find cheap flights from Montreal Trudeau Airport to St. Louis

Round-trip
Economy
Montreal (YUL)
Lambert-St Louis
Thu. 6/8
Thu. 13/8
Any month
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Good to know

Low season

May Best time to beat the crowds (17% less expensive on average)

High season

August Most popular time to fly (13% more expensive on average)

Average price of a round-trip

C$ 330 (avg. price over the last 2 weeks)

Good deal for a round-trip

C$ 296 or less

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

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$ 354 or less.
  • The cheapest flight from Montreal Trudeau Airport to St. Louis was found, on average, 53 days before departure.
  • Book at least 3 weeks before departure in order to get a below-average price.
  • High season is considered to be July, August and September. The cheapest month to fly is May.
*Average of the lowest prices shown in KAYAK’s search results for departures within the next 30 days

FAQs for booking Montreal Trudeau Airport to St. Louis flights

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

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

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

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

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

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

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

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

Scores according to KAYAK customer reviews

8.7
Korean Air
Overall score based on 4,929 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 Montreal Trudeau Airport to St. Louis

Recent round-trip flight deals

22/9
Tue.
1 stop
Korean Air
6h 49m
YUL - STL
16/11
Mon.
1 stop
Korean Air
5h 49m
STL - YUL
22/9
Tue.
1 stop
Aeroflot
6h 01m
YUL - STL
16/11
Mon.
1 stop
Aeroflot
5h 49m
STL - YUL
22/9
Tue.
1 stop
Aeromexico
6h 38m
YUL - STL
16/11
Mon.
2 stops
Aeromexico
9h 16m
STL - YUL
22/9
Tue.
1 stop
Virgin Australia
6h 29m
YUL - STL
16/11
Mon.
2 stops
Virgin Australia
8h 34m
STL - YUL
22/9
Tue.
1 stop
Lufthansa
11h 07m
YUL - STL
16/11
Mon.
1 stop
Lufthansa
6h 48m
STL - YUL
5/8
Wed.
1 stop
Delta
3h 59m
YUL - STL
8/8
Sat.
1 stop
Delta
3h 46m
STL - YUL
22/9
Tue.
1 stop
Austrian Airlines
4h 42m
YUL - STL
16/11
Mon.
1 stop
Austrian Airlines
5h 04m
STL - YUL
22/9
Tue.
1 stop
SWISS
4h 57m
YUL - STL
16/11
Mon.
1 stop
SWISS
8h 04m
STL - YUL
22/9
Tue.
1 stop
Korean Air
6h 15m
YUL - STL
16/11
Mon.
1 stop
Korean Air
5h 49m
STL - YUL
Show more results

Recent one-way flight deals

2/8
Sun.
2 stops
Delta
7h 19m
YUL - STL
2/8
Sun.
1 stop
Multiple Airlines
7h 54m
YUL - STL
2/8
Sun.
2 stops
Austrian Airlines
15h 24m
YUL - STL
2/8
Sun.
2 stops
Asiana Airlines
26h 25m
YUL - STL
2/8
Sun.
2 stops
Brussels Airlines
8h 19m
YUL - STL
2/8
Sun.
1 stop
Korean Air
6h 59m
YUL - STL
2/8
Sun.
3 stops
Aeromexico
24h 31m
YUL - STL
2/8
Sun.
2 stops
TAP AIR PORTUGAL
9h 46m
YUL - STL
2/8
Sun.
2 stops
Multiple Airlines
9h 08m
YUL - STL
2/8
Sun.
2 stops
Aer Lingus
8h 04m
YUL - STL
Show more results
*
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.

We compile tonnes of data for you
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,
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^
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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