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Fly from
Fly to
Route
Depart
Return
St. LouisMontreal
STL Lambert-St Louis - YUL Montreal Pierre Elliott Trudeau Intl
STLYUL
Lambert-St Louis
Sat 14/11
2:00 p.m.-8:34 a.m.
1 stop17h 34m
Montreal Pierre Elliott Trudeau Intl
Tue 15/12
9:40 a.m.-8:26 p.m.
1 stop11h 46m
St. LouisMontreal
STL Lambert-St Louis - YUL Montreal Pierre Elliott Trudeau Intl
STLYUL
Lambert-St Louis
Sat 14/11
8:00 a.m.-8:34 a.m.
1 stop23h 34m
Montreal Pierre Elliott Trudeau Intl
Tue 15/12
9:40 a.m.-8:32 p.m.
2 stops11h 52m
St. LouisMontreal
STL Lambert-St Louis - YUL Montreal Pierre Elliott Trudeau Intl
STLYUL
Lambert-St Louis
Sat 14/11
12:20 p.m.-8:34 a.m.
2 stops19h 14m
Montreal Pierre Elliott Trudeau Intl
Tue 15/12
9:40 a.m.-8:32 p.m.
2 stops11h 52m
St. LouisMontreal
STL Lambert-St Louis - YUL Montreal Pierre Elliott Trudeau Intl
STLYUL
Lambert-St Louis
Sat 14/11
4:39 p.m.-1:40 p.m.
2 stops20h 01m
Montreal Pierre Elliott Trudeau Intl
Thu 10/12
9:40 a.m.-8:26 p.m.
1 stop11h 46m
St. LouisMontreal
STL Lambert-St Louis - YUL Montreal Pierre Elliott Trudeau Intl
STLYUL
Lambert-St Louis
Wed 18/11
7:00 a.m.-6:58 p.m.
1 stop10h 58m
Montreal Pierre Elliott Trudeau Intl
Tue 15/12
9:40 a.m.-8:26 p.m.
1 stop11h 46m
St. LouisMontreal
STL Lambert-St Louis - YUL Montreal Pierre Elliott Trudeau Intl
STLYUL
Lambert-St Louis
Thu 19/11
7:00 a.m.-11:27 p.m.
2 stops15h 27m
Montreal Pierre Elliott Trudeau Intl
Tue 15/12
9:40 a.m.-8:32 p.m.
2 stops11h 52m
St. LouisMontreal
STL Lambert-St Louis - YUL Montreal Pierre Elliott Trudeau Intl
STLYUL
Lambert-St Louis
Wed 4/11
6:47 a.m.-6:58 p.m.
2 stops11h 11m
Montreal Pierre Elliott Trudeau Intl
Wed 11/11
9:40 a.m.-8:29 p.m.
2 stops11h 49m
St. LouisMontreal
STL Lambert-St Louis - YUL Montreal Pierre Elliott Trudeau Intl
STLYUL
Lambert-St Louis
Mon 16/11
1:02 p.m.-8:44 a.m.
1 stop18h 42m
Montreal Pierre Elliott Trudeau Intl
Thu 10/12
9:40 a.m.-12:05 a.m.
2 stops15h 25m
St. LouisMontreal
STL Lambert-St Louis - YUL Montreal Pierre Elliott Trudeau Intl
STLYUL
Lambert-St Louis
Wed 18/11
7:00 a.m.-6:58 p.m.
1 stop10h 58m
Montreal Pierre Elliott Trudeau Intl
Thu 10/12
9:40 a.m.-8:26 p.m.
1 stop11h 46m
St. LouisMontreal
STL Lambert-St Louis - YUL Montreal Pierre Elliott Trudeau Intl
STLYUL
Lambert-St Louis
Thu 19/11
7:00 a.m.-11:27 p.m.
2 stops15h 27m
Montreal Pierre Elliott Trudeau Intl
Thu 10/12
9:40 a.m.-12:05 a.m.
2 stops15h 25m
See travel insights to Montreal from
How to get the cheapest flight ticket from St. Louis to Montreal
Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip
What is the typical price of a round-trip flight between St. Louis and Montreal?
Prices are currently low for flights on this route.
Typical prices usually range from C$ 846 to C$ 1,209.The lowest price recently found on this route was C$ 788.
What is the cheapest month to fly to Montreal?
The cheapest month to fly to Montreal from St. Louis is in August. Flight prices, which tend to average around C$ 651, are often lower during this time because this is during the off-season. If you aren’t able to travel during the month of August, then book flights to Montreal from St. Louis during February instead. Flights to Montreal in February, while not as cheap as those in August, still average around C$ 721.
What is the cheapest Lambert-St Louis to Montreal flight route?
Fly from Lambert-St Louis to Montreal Pierre Elliott Trudeau Intl for the best Lambert-St Louis - Montreal flight prices
How many flights depart from St. Louis to Montreal on average per day?
As of October 2026, there are 3 flights per day flying from St. Louis to Montreal. The most common time of day flights depart is 9:00a.m., with 50% of flights taking off at noon.
How many flights depart from St. Louis to Montreal on average per week?
21 flights are operational weekly from St. Louis to Montreal as of October 2026. The most popular departure day for this route is Mon, with 14% of flights per week taking off on this day.
When to book flights from St. Louis to Montreal
Cheap St. Louis to Montreal (STL to YMQ) flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from St. Louis to Montreal
Frequently asked questions about flying from St. Louis to Montreal
How far is Lambert-St Louis to Montreal by plane?
The straight-line distance from Lambert-St Louis to Montreal is 1566.0 km. Flights usually cover this in 2h 31m, depending on flying conditions and air traffic around both airports.
When did momondo last update prices for flights from Lambert-St Louis Airport to Montreal?
Prices for flights from Lambert-St Louis Airport to Montreal were last updated today.
How old do you have to be to fly from Lambert-St Louis Airport to Montreal?
Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Lambert-St Louis Airport to Montreal.
What documentation or ID do you need to fly to Montreal?
The necessary travel and health documents for your Montreal trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.
What is the most popular plane model from St. Louis to Montreal?
momondo data reveals that the most frequently booked plane model on the route from St. Louis to Montreal is Canadair (Bombardier) Regional Jet 900, representing 62.30% of all bookings. The subsequent popular models are Boeing 787-8 Dreamliner at 18.03%, Embraer 175 at 9.84%, and Airbus A330-300 at 4.92%.
Why use momondo?
Why should I use momondo to find a flight deal from St. Louis to Montreal?
To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Montreal from St. Louis.
Can I find flights from St. Louis to Montreal with flexible booking policies on momondo?
Yes. momondo enables you to select and highlight flights to Montreal from St. Louis with this policy.
How can momondo help me find flights from St. Louis to Montreal?
Once you have performed a search for St. Louis to Montreal flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.
I’m not ready to book a flight from St. Louis to Montreal right now. Can momondo alert me if prices change?
Yes momondo offers price alerts on flights to Montreal from St. Louis. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.