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Cheap flights from St. Louis to Montreal from C$ 210

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from St. Louis to Montreal departing on 20/4. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult

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Find the cheapest flights from St. Louis to Montreal

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
4:59 p.m. - 12:30 a.m.
STL
-
YUL
30h 31m
1 stop
Multiple Airlines Logo
6:45 a.m. - 6:50 a.m.
YUL
-
STL
25h 05m
2 stops
C$ 533Multiple Airlines
mar, 14 apr - mar, 21 apr
Multiple Airlines Logo
4:59 p.m. - 12:30 a.m.
STL
-
YUL
30h 31m
1 stop
Multiple Airlines Logo
6:45 a.m. - 6:50 a.m.
YUL
-
STL
25h 05m
2 stops
C$ 552Multiple Airlines
mar, 14 apr - mar, 21 apr
American Airlines Logo
6:00 a.m. - 2:58 p.m.
STL
-
YUL
7h 58m
1 stop
American Airlines Logo
3:45 p.m. - 12:05 a.m.
YUL
-
STL
9h 20m
1 stop
C$ 562American Airlines
gio, 2 apr - lun, 6 apr
Multiple Airlines Logo
4:59 p.m. - 12:30 a.m.
STL
-
YUL
30h 31m
1 stop
Multiple Airlines Logo
8:00 a.m. - 6:50 a.m.
YUL
-
STL
23h 50m
2 stops
C$ 564Multiple Airlines
ven, 17 apr - ven, 24 apr
American Airlines Logo
6:00 a.m. - 2:58 p.m.
STL
-
YUL
7h 58m
1 stop
American Airlines Logo
12:59 p.m. - 12:05 a.m.
YUL
-
STL
12h 06m
2 stops
C$ 574American Airlines
gio, 2 apr - lun, 6 apr
American Airlines Logo
7:05 a.m. - 9:37 p.m.
STL
-
YUL
13h 32m
2 stops
American Airlines Logo
1:03 p.m. - 11:46 p.m.
YUL
-
STL
11h 43m
2 stops
C$ 582American Airlines
sab, 18 apr - sab, 25 apr
Multiple Airlines Logo
8:23 p.m. - 3:10 p.m.
STL
-
YUL
17h 47m
2 stops
Multiple Airlines Logo
4:35 p.m. - 11:19 p.m.
YUL
-
STL
7h 44m
1 stop
C$ 607Multiple Airlines
mer, 29 apr - ven, 1 mag
American Airlines Logo
8:03 p.m. - 11:44 a.m.
STL
-
YUL
14h 41m
1 stop
American Airlines Logo
12:30 p.m. - 10:19 p.m.
YUL
-
STL
10h 49m
1 stop
C$ 622American Airlines
mar, 14 apr - mar, 21 apr
American Airlines Logo
4:30 p.m. - 11:44 a.m.
STL
-
YUL
18h 14m
1 stop
American Airlines Logo
7:29 a.m. - 7:30 p.m.
YUL
-
STL
13h 01m
1 stop
C$ 625American Airlines
mer, 15 apr - dom, 19 apr
Multiple Airlines Logo
6:29 p.m. - 4:25 p.m.
STL
-
YUL
20h 56m
2 stops
Multiple Airlines Logo
4:35 p.m. - 7:51 a.m.
YUL
-
STL
16h 16m
1 stop
C$ 631Multiple Airlines
gio, 9 apr - dom, 12 apr

Delta flights from St. Louis to Montreal

Our best Delta deals on St. Louis to Montreal flight tickets
Delta
25 Jun
STL5:30 p.m.Lambert-St Louis
5h 26m
1 stop
YUL11:56 p.m.Montreal Pierre Elliott Trudeau Intl
4 Jul
YUL4:55 p.m.Montreal Pierre Elliott Trudeau Intl
4h 36m
1 stop
STL8:31 p.m.Lambert-St Louis
C$ 742
Delta
25 Jun
STL5:30 p.m.Lambert-St Louis
5h 26m
1 stop
YUL11:56 p.m.Montreal Pierre Elliott Trudeau Intl
4 Jul
YUL4:55 p.m.Montreal Pierre Elliott Trudeau Intl
4h 36m
1 stop
STL8:31 p.m.Lambert-St Louis
C$ 760
Delta
16 Mar
STL12:28 p.m.Lambert-St Louis
10h 12m
1 stop
YUL11:40 p.m.Montreal Pierre Elliott Trudeau Intl
20 Mar
YUL6:00 a.m.Montreal Pierre Elliott Trudeau Intl
7h 58m
1 stop
STL12:58 p.m.Lambert-St Louis
C$ 789

Air Canada flights from St. Louis to Montreal

Our best Air Canada deals on St. Louis to Montreal flight tickets
Air Canada
17 Apr
STL4:05 p.m.Lambert-St Louis
6h 16m
1 stop
YUL11:21 p.m.Montreal Pierre Elliott Trudeau Intl
24 Apr
YUL10:10 a.m.Montreal Pierre Elliott Trudeau Intl
6h 15m
1 stop
STL3:25 p.m.Lambert-St Louis
C$ 668
Air Canada
25 Apr
STL9:16 a.m.Lambert-St Louis
8h 40m
1 stop
YUL6:56 p.m.Montreal Pierre Elliott Trudeau Intl
27 Apr
YUL11:10 a.m.Montreal Pierre Elliott Trudeau Intl
11h 03m
2 stops
STL9:13 p.m.Lambert-St Louis
C$ 670
Air Canada
17 Apr
STL4:05 p.m.Lambert-St Louis
6h 16m
1 stop
YUL11:21 p.m.Montreal Pierre Elliott Trudeau Intl
24 Apr
YUL11:10 a.m.Montreal Pierre Elliott Trudeau Intl
5h 15m
1 stop
STL3:25 p.m.Lambert-St Louis
C$ 677

momondo Fare Finder

 
Customize your flight search to find flights from St. Louis to Montreal that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 96,600 searches. Data last updated 5 marzo 2026.
Use the filters below to find and compare flights from St. Louis to Montreal that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

mar 14/4

4:59 p.m.-12:30 a.m.

1 stop30h 31m

Montreal Pierre Elliott Trudeau Intl

mar 21/4

6:45 a.m.-6:50 a.m.

2 stops25h 05m

C$ 533

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

mar 14/4

4:59 p.m.-12:30 a.m.

1 stop30h 31m

Montreal Pierre Elliott Trudeau Intl

mar 21/4

6:45 a.m.-6:50 a.m.

2 stops25h 05m

C$ 552

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

gio 2/4

6:00 a.m.-2:58 p.m.

1 stop7h 58m

Montreal Pierre Elliott Trudeau Intl

lun 6/4

3:45 p.m.-12:05 a.m.

1 stop9h 20m

C$ 562

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

ven 17/4

4:59 p.m.-12:30 a.m.

1 stop30h 31m

Montreal Pierre Elliott Trudeau Intl

ven 24/4

8:00 a.m.-6:50 a.m.

2 stops23h 50m

C$ 564

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

gio 2/4

6:00 a.m.-2:58 p.m.

1 stop7h 58m

Montreal Pierre Elliott Trudeau Intl

lun 6/4

12:59 p.m.-12:05 a.m.

2 stops12h 06m

C$ 574

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

sab 18/4

7:05 a.m.-9:37 p.m.

2 stops13h 32m

Montreal Pierre Elliott Trudeau Intl

sab 25/4

1:03 p.m.-11:46 p.m.

2 stops11h 43m

C$ 582

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

mer 29/4

8:23 p.m.-3:10 p.m.

2 stops17h 47m

Montreal Pierre Elliott Trudeau Intl

ven 1/5

4:35 p.m.-11:19 p.m.

1 stop7h 44m

C$ 607

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

mar 14/4

8:03 p.m.-11:44 a.m.

1 stop14h 41m

Montreal Pierre Elliott Trudeau Intl

mar 21/4

12:30 p.m.-10:19 p.m.

1 stop10h 49m

C$ 622

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

mer 15/4

4:30 p.m.-11:44 a.m.

1 stop18h 14m

Montreal Pierre Elliott Trudeau Intl

dom 19/4

7:29 a.m.-7:30 p.m.

1 stop13h 01m

C$ 625

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

gio 9/4

6:29 p.m.-4:25 p.m.

2 stops20h 56m

Montreal Pierre Elliott Trudeau Intl

dom 12/4

4:35 p.m.-7:51 a.m.

1 stop16h 16m

C$ 631

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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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?

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

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

There is only 1 cabin class available to choose from on Lambert-St Louis to Montreal 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 St. Louis to Montreal flights?

You could potentially save up to 42% on your flight if you consider stops on a St. Louis to Montreal flight.

When to book flights from St. Louis to Montreal

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

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

Fastest flight time

2h 32m

Direct flights

Mon, Tue, Fri, Sat and Sun

Airports in Montreal

2 airports
The fastest flight from St. Louis to Montreal takes 2h 32m
Direct flights go from St. Louis to Montreal on Monday, Tuesday, Friday, Saturday and Sunday. There are no airlines offering direct flights.
There are 2 airports in Montreal. From St. Louis there are direct flights to Montreal Pierre Elliott Trudeau Intl (YUL).
Search flight deals

  • 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 32m, 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?

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.

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Find better results for your trip to Canada

Fly into one of these airports located in Montreal

Airports listed have a maximum distance of 15.1 km from Montreal
Montreal St Hubert Airport
Montreal Pierre Elliott Trudeau Intl Airport