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Cheap flights from Montreal to St. Louis from C$ 318

1 adult
1 adult, Economy, 0 bags

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Montreal to St. Louis

Cheap round-trip flights

Enter your travel dates to find the best prices.
American Airlines Logo
12:10 p.m. - 8:04 p.m.YUL  Montreal Pierre Elliott Trudeau Intl-STL Lambert-St Louis
8h 54m1 stop Chicago O'Hare Intl
American Airlines Logo
7:26 a.m. - 9:26 p.m.STL  Lambert-St Louis-YUL Montreal Pierre Elliott Trudeau Intl
13h 00m2 stops Chicago O'Hare Intl Philadelphia
C$ 646American Airlines
Thu, 19 Nov - Sat, 21 Nov
American Airlines Logo
10:32 a.m. - 8:52 p.m.YUL  Montreal Pierre Elliott Trudeau Intl-STL Lambert-St Louis
11h 20m1 stop New York LaGuardia
American Airlines Logo
5:23 p.m. - 11:44 a.m.STL  Lambert-St Louis-YUL Montreal Pierre Elliott Trudeau Intl
17h 21m1 stop Chicago O'Hare Intl
C$ 653American Airlines
Tue, 13 Oct - Sat, 17 Oct
American Airlines Logo
10:32 a.m. - 8:52 p.m.YUL  Montreal Pierre Elliott Trudeau Intl-STL Lambert-St Louis
11h 20m1 stop New York LaGuardia
American Airlines Logo
5:00 a.m. - 4:52 p.m.STL  Lambert-St Louis-YUL Montreal Pierre Elliott Trudeau Intl
10h 52m1 stop Chicago O'Hare Intl
C$ 655American Airlines
Tue, 20 Oct - Sat, 24 Oct
American Airlines Logo
12:10 p.m. - 11:59 p.m.YUL  Montreal Pierre Elliott Trudeau Intl-STL Lambert-St Louis
12h 49m1 stop Chicago O'Hare Intl
American Airlines Logo
8:15 p.m. - 11:25 a.m.STL  Lambert-St Louis-YUL Montreal Pierre Elliott Trudeau Intl
14h 10m1 stop Chicago O'Hare Intl
C$ 671American Airlines
Mon, 2 Nov - Mon, 9 Nov
American Airlines Logo
10:32 a.m. - 8:52 p.m.YUL  Montreal Pierre Elliott Trudeau Intl-STL Lambert-St Louis
11h 20m1 stop New York LaGuardia
American Airlines Logo
5:29 p.m. - 11:25 a.m.STL  Lambert-St Louis-YUL Montreal Pierre Elliott Trudeau Intl
16h 56m1 stop Chicago O'Hare Intl
C$ 698American Airlines
Fri, 23 Oct - Tue, 3 Nov
American Airlines Logo
10:32 a.m. - 8:52 p.m.YUL  Montreal Pierre Elliott Trudeau Intl-STL Lambert-St Louis
11h 20m1 stop New York LaGuardia
American Airlines Logo
5:29 p.m. - 11:25 a.m.STL  Lambert-St Louis-YUL Montreal Pierre Elliott Trudeau Intl
16h 56m1 stop Chicago O'Hare Intl
C$ 699American Airlines
Fri, 23 Oct - Tue, 3 Nov
American Airlines Logo
10:32 a.m. - 8:52 p.m.YUL  Montreal Pierre Elliott Trudeau Intl-STL Lambert-St Louis
11h 20m1 stop New York LaGuardia
American Airlines Logo
7:26 a.m. - 9:26 p.m.STL  Lambert-St Louis-YUL Montreal Pierre Elliott Trudeau Intl
13h 00m2 stops Chicago O'Hare Intl Philadelphia
C$ 711American Airlines
Fri, 23 Oct - Tue, 3 Nov
American Airlines Logo
10:32 a.m. - 8:52 p.m.YUL  Montreal Pierre Elliott Trudeau Intl-STL Lambert-St Louis
11h 20m1 stop New York LaGuardia
American Airlines Logo
7:26 a.m. - 9:26 p.m.STL  Lambert-St Louis-YUL Montreal Pierre Elliott Trudeau Intl
13h 00m2 stops Chicago O'Hare Intl Philadelphia
C$ 713American Airlines
Fri, 23 Oct - Tue, 3 Nov
Air Canada Logo
4:55 p.m. - 6:41 p.m.YUL  Montreal Pierre Elliott Trudeau Intl-STL Lambert-St Louis
2h 46mdirect
Air Canada Logo
12:10 p.m. - 3:41 p.m.STL  Lambert-St Louis-YUL Montreal Pierre Elliott Trudeau Intl
2h 31mdirect
C$ 868Air Canada
Thu, 15 Oct - Sun, 18 Oct
Air Canada Logo
8:35 a.m. - 2:00 p.m.YUL  Montreal Pierre Elliott Trudeau Intl-STL Lambert-St Louis
6h 25m2 stops Ottawa Toronto Pearson Intl
Air Canada Logo
12:10 p.m. - 3:41 p.m.STL  Lambert-St Louis-YUL Montreal Pierre Elliott Trudeau Intl
2h 31mdirect
C$ 872Air Canada
Thu, 15 Oct - Sun, 18 Oct

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American Airlines flights from Montreal to St. Louis

Our best American Airlines deals on Montreal to St. Louis flight tickets
American Airlines
19 Nov
YUL12:10 p.m.Montreal Pierre Elliott Trudeau Intl
8h 54m
1 stop
STL8:04 p.m.Lambert-St Louis
21 Nov
STL7:26 a.m.Lambert-St Louis
13h 00m
2 stops
YUL9:26 p.m.Montreal Pierre Elliott Trudeau Intl
C$ 646
American Airlines
13 Oct
YUL10:32 a.m.Montreal Pierre Elliott Trudeau Intl
11h 20m
1 stop
STL8:52 p.m.Lambert-St Louis
17 Oct
STL5:23 p.m.Lambert-St Louis
17h 21m
1 stop
YUL11:44 a.m.Montreal Pierre Elliott Trudeau Intl
C$ 653
American Airlines
20 Oct
YUL10:32 a.m.Montreal Pierre Elliott Trudeau Intl
11h 20m
1 stop
STL8:52 p.m.Lambert-St Louis
24 Oct
STL5:00 a.m.Lambert-St Louis
10h 52m
1 stop
YUL4:52 p.m.Montreal Pierre Elliott Trudeau Intl
C$ 655

United Airlines flights from Montreal to St. Louis

Our best United Airlines deals on Montreal to St. Louis flight tickets
United Airlines
20 Oct
YUL4:25 p.m.Montreal Pierre Elliott Trudeau Intl
20h 48m
2 stops
STL12:13 p.m.Lambert-St Louis
24 Oct
STL5:36 p.m.Lambert-St Louis
18h 10m
2 stops
YUL12:46 p.m.Montreal Pierre Elliott Trudeau Intl
C$ 727
United Airlines
15 Oct
YUL6:10 a.m.Montreal Pierre Elliott Trudeau Intl
10h 33m
1 stop
STL3:43 p.m.Lambert-St Louis
19 Oct
STL8:00 a.m.Lambert-St Louis
10h 01m
1 stop
YUL7:01 p.m.Montreal Pierre Elliott Trudeau Intl
C$ 729
United Airlines
23 Oct
YUL6:30 p.m.Montreal Pierre Elliott Trudeau Intl
20h 46m
1 stop
STL2:16 p.m.Lambert-St Louis
3 Nov
STL8:30 a.m.Lambert-St Louis
9h 27m
1 stop
YUL6:57 p.m.Montreal Pierre Elliott Trudeau Intl
C$ 744

momondo Fare Finder

 
Use the filters below to find and compare flights from Montreal to St. Louis that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

MontrealSt. Louis

YUL Montreal Pierre Elliott Trudeau Intl - STL Lambert-St Louis

YULSTL

Montreal Pierre Elliott Trudeau Intl

Thu 19/11

12:10 p.m.-8:04 p.m.

1 stop8h 54m

Lambert-St Louis

Sat 21/11

7:26 a.m.-9:26 p.m.

2 stops13h 00m

C$ 646

MontrealSt. Louis

YUL Montreal Pierre Elliott Trudeau Intl - STL Lambert-St Louis

YULSTL

Montreal Pierre Elliott Trudeau Intl

Tue 13/10

10:32 a.m.-8:52 p.m.

1 stop11h 20m

Lambert-St Louis

Sat 17/10

5:23 p.m.-11:44 a.m.

1 stop17h 21m

C$ 653

MontrealSt. Louis

YUL Montreal Pierre Elliott Trudeau Intl - STL Lambert-St Louis

YULSTL

Montreal Pierre Elliott Trudeau Intl

Tue 20/10

10:32 a.m.-8:52 p.m.

1 stop11h 20m

Lambert-St Louis

Sat 24/10

5:00 a.m.-4:52 p.m.

1 stop10h 52m

C$ 655

MontrealSt. Louis

YUL Montreal Pierre Elliott Trudeau Intl - STL Lambert-St Louis

YULSTL

Montreal Pierre Elliott Trudeau Intl

Mon 2/11

12:10 p.m.-11:59 p.m.

1 stop12h 49m

Lambert-St Louis

Mon 9/11

8:15 p.m.-11:25 a.m.

1 stop14h 10m

C$ 671

MontrealSt. Louis

YUL Montreal Pierre Elliott Trudeau Intl - STL Lambert-St Louis

YULSTL

Montreal Pierre Elliott Trudeau Intl

Fri 23/10

10:32 a.m.-8:52 p.m.

1 stop11h 20m

Lambert-St Louis

Tue 3/11

5:29 p.m.-11:25 a.m.

1 stop16h 56m

C$ 698

MontrealSt. Louis

YUL Montreal Pierre Elliott Trudeau Intl - STL Lambert-St Louis

YULSTL

Montreal Pierre Elliott Trudeau Intl

Fri 23/10

10:32 a.m.-8:52 p.m.

1 stop11h 20m

Lambert-St Louis

Tue 3/11

5:29 p.m.-11:25 a.m.

1 stop16h 56m

C$ 699

MontrealSt. Louis

YUL Montreal Pierre Elliott Trudeau Intl - STL Lambert-St Louis

YULSTL

Montreal Pierre Elliott Trudeau Intl

Fri 23/10

10:32 a.m.-8:52 p.m.

1 stop11h 20m

Lambert-St Louis

Tue 3/11

7:26 a.m.-9:26 p.m.

2 stops13h 00m

C$ 711

MontrealSt. Louis

YUL Montreal Pierre Elliott Trudeau Intl - STL Lambert-St Louis

YULSTL

Montreal Pierre Elliott Trudeau Intl

Fri 23/10

10:32 a.m.-8:52 p.m.

1 stop11h 20m

Lambert-St Louis

Tue 3/11

7:26 a.m.-9:26 p.m.

2 stops13h 00m

C$ 713
Quickest round-trip

MontrealSt. Louis

YUL Montreal Pierre Elliott Trudeau Intl - STL Lambert-St Louis

YULSTL

Montreal Pierre Elliott Trudeau Intl

Thu 15/10

4:55 p.m.-6:41 p.m.

Nonstop2h 46m

Lambert-St Louis

Sun 18/10

12:10 p.m.-3:41 p.m.

Nonstop2h 31m

C$ 868

MontrealSt. Louis

YUL Montreal Pierre Elliott Trudeau Intl - STL Lambert-St Louis

YULSTL

Montreal Pierre Elliott Trudeau Intl

Thu 15/10

8:35 a.m.-2:00 p.m.

2 stops6h 25m

Lambert-St Louis

Sun 18/10

12:10 p.m.-3:41 p.m.

Nonstop2h 31m

C$ 872

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

See travel insights to St. Louis from

How to get the cheapest flight ticket from Montreal to St. Louis

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 cheapest month to fly to St. Louis?

The month of August is, on average, the cheapest month to fly to St. Louis from Montreal, with most prices found around C$ 619. If you don’t want to visit St. Louis in August, then you should wait until May to fly from Montreal, when ticket prices are also cheap, with an average price of C$ 768.

What is the cheapest day to depart on your flight to St. Louis?

Our data shows that Friday is the least expensive day to fly to St. Louis. Tickets to fly out on this day can be as low as C$ 779. The most expensive day to fly to St. Louis is Tuesday, with ticket prices averaging around C$ 1,679.

What is the cheapest time of day to depart on your flight to St. Louis?

The cheapest time of day to fly to St. Louis is in the afternoon when flights can be purchased for as low as C$ 792. If you have a flexible travel schedule, then try to avoid flying in the morning when prices are C$ 1,679 on average. Flights to St. Louis from Montreal in the morning are generally more expensive because this time of day is more convenient for travellers’ schedules.

What is the cheapest Montreal to Lambert-St Louis flight route?

Fly from Montreal Pierre Elliott Trudeau Intl to Lambert-St Louis for the best Montreal - Lambert-St Louis flight prices

What cabin class options are available on Montreal to St. Louis flights?

There is only 1 cabin class available to choose from on Montreal to St. Louis flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on Montreal to St. Louis flights?

You could potentially save up to 35% on your flight if you consider stops on a Montreal to St. Louis flight.

When to book flights from Montreal to St. Louis

Are you open to changing your travel dates? Check out the ideal times to fly from Montreal to St. Louis according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Montreal to St. Louis (YMQ to STL) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Montreal to St. Louis

Best price found

C$ 318

Fastest flight time

2h 46m

Direct flights

Tue, Wed, Fri and Sun

Airports in St. Louis

1 airport
The best one-way flight to St. Louis from Montreal in the past 72 hours is C$ 318. The best round-trip flight deal from Montreal to St. Louis found on momondo in the last 72 hours is C$ 646.
The fastest flight from Montreal to St. Louis takes 2h 46m
Direct flights go from Montreal to St. Louis on Tuesday, Wednesday, Friday and Sunday. There are no airlines offering direct flights.
There is 1 airport in St. Louis. From Montreal there are direct flights to Lambert-St Louis (STL).
Search flight deals

Frequently asked questions about flying from Montreal to St. Louis

  • How far is Montreal to Lambert-St Louis by plane?

    The straight-line distance from Montreal to Lambert-St Louis is 1566.0 km. Flights usually cover this in 2h 46m, depending on flying conditions and air traffic around both airports.

  • When did momondo last update prices for flights from Montreal to Lambert-St Louis Airport?

    Prices for flights from Montreal to Lambert-St Louis Airport are updated daily.

  • How many operators does momondo search for flights from Montreal to Lambert-St Louis Airport?

  • How old do you have to be to fly from Montreal to Lambert-St Louis Airport?

    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 Montreal to Lambert-St Louis Airport.

  • What documentation or ID do you need to fly to Lambert-St Louis Airport?

    The travel and health documents you'll need for your trip to Lambert-St Louis Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Lambert-St Louis Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

  • What is the most popular plane model from Montreal to St. Louis?

  • What is the most popular airline from Montreal to St. Louis?

Best airlines flying from Montreal to St. Louis

Compare and see reviews for airlines that fly from Montreal to St. Louis with momondo
Airline
Rating
Free Cancellation
Price
Air CanadaPriceFrom C$ 565Free CancellationRating
7.1
11,661 reviews
Search Air Canada flights

  • Air Canada Flights From Montreal to St. Louis

    Across 7 Air Canada flights from Montreal to St. Louis this week, the average price was C$ 823, with the best Air Canada deals starting from C$ 565 round-trip. 11,661 users have rated Air Canada on momondo, with an average score of 7.1/10.

Travelling to a place near St. Louis?

Book flights to St. Louis if you plan to visit one of these locations
St. Charles

Why use momondo?

Why should I use momondo to find a flight deal from Montreal to St. Louis?

It is quick and easy to find Montreal to St. Louis flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to St. Louis that suits you.

Can I find flights from Montreal to St. Louis with flexible booking policies on momondo?

Yes. All flights to St. Louis from Montreal on momondo can be compared and filtered by various policies on offer, including flexible booking.

How can momondo help me find flights from Montreal to St. Louis?

Once all potential Montreal to St. Louis flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

I’m not ready to book a flight from Montreal to St. Louis right now. Can momondo alert me if prices change?

If you are simply researching potential flights to St. Louis, momondo offers a useful price alert feature which will track prices for flights to St. Louis from Montreal and alert you when they change.

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