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Cheap flights from Montreal Pierre Elliott Trudeau Intl Airport to St. Louis from C$ 342

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Montreal Pierre Elliott Trudeau Intl Airport to St. Louis departing on 25/8. 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
1 adult, Economy, 0 bags

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Montreal Pierre Elliott Trudeau Intl Airport to St. Louis

Cheap round-trip flights

Enter your travel dates to find the best prices.
Air Canada Logo
4:55 p.m. - 6:41 p.m.
YUL
-
STL
2h 46mdirect
Air Canada Logo
12:10 p.m. - 3:41 p.m.
STL
-
YUL
2h 31mdirect
C$ 681Air Canada
Thu, 15 Oct - Mon, 19 Oct
Air Canada Logo
4:55 p.m. - 6:42 p.m.
YUL
-
STL
2h 47mdirect
Air Canada Logo
12:10 p.m. - 3:42 p.m.
STL
-
YUL
2h 32mdirect
C$ 684Air Canada
Fri, 24 Jul - Sun, 26 Jul
American Airlines Logo
12:30 p.m. - 12:14 a.m.
YUL
-
STL
12h 44m
1 stop
American Airlines Logo
7:21 a.m. - 4:53 p.m.
STL
-
YUL
8h 32m
1 stop
C$ 685American Airlines
Wed, 2 Sep - Mon, 28 Sep
Delta Logo
6:00 a.m. - 1:20 p.m.
YUL
-
STL
8h 20m
1 stop
Delta Logo
5:45 p.m. - 11:10 p.m.
STL
-
YUL
4h 25m
1 stop
C$ 688Delta
Tue, 27 Oct - Wed, 28 Oct
Delta Logo
7:00 a.m. - 12:56 p.m.
YUL
-
STL
6h 56m
1 stop
Delta Logo
7:20 a.m. - 5:03 p.m.
STL
-
YUL
8h 43m
1 stop
C$ 690Delta
Thu, 15 Oct - Mon, 19 Oct
Air Canada Logo
8:40 a.m. - 2:02 p.m.
YUL
-
STL
6h 22m
2 stops
Air Canada Logo
12:10 p.m. - 3:42 p.m.
STL
-
YUL
2h 32mdirect
C$ 691Air Canada
Thu, 9 Jul - Sun, 12 Jul
Air Canada Logo
4:55 p.m. - 6:42 p.m.
YUL
-
STL
2h 47mdirect
Air Canada Logo
12:10 p.m. - 3:42 p.m.
STL
-
YUL
2h 32mdirect
C$ 692Air Canada
Thu, 9 Jul - Sun, 12 Jul
Air Canada Logo
4:55 p.m. - 6:42 p.m.
YUL
-
STL
2h 47mdirect
Air Canada Logo
8:55 a.m. - 6:35 p.m.
STL
-
YUL
8h 40m
2 stops
C$ 695Air Canada
Fri, 17 Jul - Sun, 19 Jul
American Airlines Logo
12:30 p.m. - 12:16 a.m.
YUL
-
STL
12h 46m
1 stop
American Airlines Logo
6:00 a.m. - 4:50 p.m.
STL
-
YUL
9h 50m
1 stop
C$ 697American Airlines
Tue, 4 Aug - Tue, 11 Aug
Delta Logo
7:00 a.m. - 12:56 p.m.
YUL
-
STL
6h 56m
1 stop
Delta Logo
7:20 a.m. - 5:03 p.m.
STL
-
YUL
8h 43m
1 stop
C$ 698Delta
Thu, 15 Oct - Mon, 19 Oct

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Delta flights from Montreal Pierre Elliott Trudeau Intl Airport to St. Louis

Our best Delta deals on Montreal Pierre Elliott Trudeau Intl Airport to St. Louis flight tickets
Delta
27 Oct
YUL6:00 a.m.Montreal Pierre Elliott Trudeau Intl
8h 20m
1 stop
STL1:20 p.m.Lambert-St Louis
28 Oct
STL5:45 p.m.Lambert-St Louis
4h 25m
1 stop
YUL11:10 p.m.Montreal Pierre Elliott Trudeau Intl
C$ 688
Delta
15 Oct
YUL7:00 a.m.Montreal Pierre Elliott Trudeau Intl
6h 56m
1 stop
STL12:56 p.m.Lambert-St Louis
19 Oct
STL7:20 a.m.Lambert-St Louis
8h 43m
1 stop
YUL5:03 p.m.Montreal Pierre Elliott Trudeau Intl
C$ 690
Delta
15 Oct
YUL7:00 a.m.Montreal Pierre Elliott Trudeau Intl
6h 56m
1 stop
STL12:56 p.m.Lambert-St Louis
19 Oct
STL7:20 a.m.Lambert-St Louis
8h 43m
1 stop
YUL5:03 p.m.Montreal Pierre Elliott Trudeau Intl
C$ 698

Air Canada flights from Montreal Pierre Elliott Trudeau Intl Airport to St. Louis

Our best Air Canada deals on Montreal Pierre Elliott Trudeau Intl Airport to St. Louis flight tickets
Air Canada
15 Oct
YUL4:55 p.m.Montreal Pierre Elliott Trudeau Intl
2h 46m
STL6:41 p.m.Lambert-St Louis
19 Oct
STL12:10 p.m.Lambert-St Louis
2h 31m
YUL3:41 p.m.Montreal Pierre Elliott Trudeau Intl
C$ 681
Air Canada
24 Jul
YUL4:55 p.m.Montreal Pierre Elliott Trudeau Intl
2h 47m
STL6:42 p.m.Lambert-St Louis
26 Jul
STL12:10 p.m.Lambert-St Louis
2h 32m
YUL3:42 p.m.Montreal Pierre Elliott Trudeau Intl
C$ 684
Air Canada
9 Jul
YUL8:40 a.m.Montreal Pierre Elliott Trudeau Intl
6h 22m
2 stops
STL2:02 p.m.Lambert-St Louis
12 Jul
STL12:10 p.m.Lambert-St Louis
2h 32m
YUL3:42 p.m.Montreal Pierre Elliott Trudeau Intl
C$ 691

momondo Fare Finder

 
Customize your flight search to find flights from Montreal Pierre Elliott Trudeau Intl Airport to St. Louis 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 27 June 2026.
Use the filters below to find and compare flights from Montreal Pierre Elliott Trudeau Intl Airport to St. Louis that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip
Quickest round-trip

MontrealSt. Louis

YUL - STL

YULSTL

Montreal Pierre Elliott Trudeau Intl

Thu 15/10

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

Nonstop2h 46m

Lambert-St Louis

Mon 19/10

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

Nonstop2h 31m

C$ 681

MontrealSt. Louis

YUL - STL

YULSTL

Montreal Pierre Elliott Trudeau Intl

Fri 24/7

4:55 p.m.-6:42 p.m.

Nonstop2h 47m

Lambert-St Louis

Sun 26/7

12:10 p.m.-3:42 p.m.

Nonstop2h 32m

C$ 684

MontrealSt. Louis

YUL - STL

YULSTL

Montreal Pierre Elliott Trudeau Intl

Wed 2/9

12:30 p.m.-12:14 a.m.

1 stop12h 44m

Lambert-St Louis

Mon 28/9

7:21 a.m.-4:53 p.m.

1 stop8h 32m

C$ 685

MontrealSt. Louis

YUL - STL

YULSTL

Montreal Pierre Elliott Trudeau Intl

Tue 27/10

6:00 a.m.-1:20 p.m.

1 stop8h 20m

Lambert-St Louis

Wed 28/10

5:45 p.m.-11:10 p.m.

1 stop4h 25m

C$ 688

MontrealSt. Louis

YUL - STL

YULSTL

Montreal Pierre Elliott Trudeau Intl

Thu 15/10

7:00 a.m.-12:56 p.m.

1 stop6h 56m

Lambert-St Louis

Mon 19/10

7:20 a.m.-5:03 p.m.

1 stop8h 43m

C$ 690

MontrealSt. Louis

YUL - STL

YULSTL

Montreal Pierre Elliott Trudeau Intl

Thu 9/7

8:40 a.m.-2:02 p.m.

2 stops6h 22m

Lambert-St Louis

Sun 12/7

12:10 p.m.-3:42 p.m.

Nonstop2h 32m

C$ 691

MontrealSt. Louis

YUL - STL

YULSTL

Montreal Pierre Elliott Trudeau Intl

Thu 9/7

4:55 p.m.-6:42 p.m.

Nonstop2h 47m

Lambert-St Louis

Sun 12/7

12:10 p.m.-3:42 p.m.

Nonstop2h 32m

C$ 692

MontrealSt. Louis

YUL - STL

YULSTL

Montreal Pierre Elliott Trudeau Intl

Fri 17/7

4:55 p.m.-6:42 p.m.

Nonstop2h 47m

Lambert-St Louis

Sun 19/7

8:55 a.m.-6:35 p.m.

2 stops8h 40m

C$ 695

MontrealSt. Louis

YUL - STL

YULSTL

Montreal Pierre Elliott Trudeau Intl

Tue 4/8

12:30 p.m.-12:16 a.m.

1 stop12h 46m

Lambert-St Louis

Tue 11/8

6:00 a.m.-4:50 p.m.

1 stop9h 50m

C$ 697

MontrealSt. Louis

YUL - STL

YULSTL

Montreal Pierre Elliott Trudeau Intl

Thu 15/10

7:00 a.m.-12:56 p.m.

1 stop6h 56m

Lambert-St Louis

Mon 19/10

7:20 a.m.-5:03 p.m.

1 stop8h 43m

C$ 698

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 St. Louis from

How to get the cheapest flight ticket from Montreal Pierre Elliott Trudeau Intl Airport 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 typical price of a round-trip flight between Montreal Pierre Elliott Trudeau Intl Airport and St. Louis?

What is the cheapest month to fly to St. Louis?

The month of November is, on average, the cheapest month to fly to St. Louis from Montreal Pierre Elliott Trudeau Intl Airport, with most prices found around C$ 769. If you don’t want to visit St. Louis in November, then you should wait until October to fly from Montreal Pierre Elliott Trudeau Intl Airport, when ticket prices are also cheap, with an average price of C$ 776.

What is the cheapest Montreal Pierre Elliott Trudeau Intl to Lambert-St Louis flight route?

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

What cabin class options are available on Montreal Pierre Elliott Trudeau Intl Airport to St. Louis flights?

There is only 1 cabin class available to choose from on Montreal Pierre Elliott Trudeau Intl Airport 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 Pierre Elliott Trudeau Intl Airport to St. Louis flights?

You could potentially save up to 3% on your flight if you consider stops on a Montreal Pierre Elliott Trudeau Intl Airport to St. Louis flight.

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

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

Cheap Montreal Pierre Elliott Trudeau Intl Airport to St. Louis (YUL to STL) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Montreal Pierre Elliott Trudeau Intl Airport to St. Louis

Fastest flight time

2h 46m

Direct flights

Mon, Tue, Wed, Thu, Fri and Sat

Airports in St. Louis

1 airport
The fastest flight from Montreal Pierre Elliott Trudeau Intl Airport to St. Louis takes 2h 46m
Direct flights go from Montreal Pierre Elliott Trudeau Intl Airport to St. Louis on Monday, Tuesday, Wednesday, Thursday, Friday and Saturday. There are no airlines offering direct flights.
There is 1 airport in St. Louis. From Montreal Pierre Elliott Trudeau Intl Airport there are direct flights to Lambert-St Louis (STL).
Search flight deals

Frequently asked questions about flying from Montreal Pierre Elliott Trudeau Intl Airport to St. Louis

  • How far is Montreal Pierre Elliott Trudeau Intl to Lambert-St Louis by plane?

    A flight from Montreal Pierre Elliott Trudeau Intl to Lambert-St Louis will travel around 1551.0 km. By plane, this route typically takes 2h 46m.

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

    Prices for flights from Montreal Pierre Elliott Trudeau Intl Airport to Lambert-St Louis Airport are updated daily.

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

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

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Montreal Pierre Elliott Trudeau Intl Airport to Lambert-St Louis Airport.

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

    The travel and health documents required for your trip to Lambert-St Louis Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Lambert-St Louis Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

  • What is the most popular plane model from Montreal Pierre Elliott Trudeau Intl Airport to St. Louis?

  • What is the most popular airline from Montreal Pierre Elliott Trudeau Intl Airport to St. Louis?

Best airlines flying from Montreal Pierre Elliott Trudeau Intl Airport to St. Louis

Compare and see reviews for airlines that fly from Montreal Pierre Elliott Trudeau Intl Airport to St. Louis with momondo
Airline
Rating
Free Cancellation
Price
Air CanadaPriceFrom C$ 572Free CancellationRating
7.1
11,268 reviews
Search Air Canada flights

  • Air Canada Flights From Montreal Pierre Elliott Trudeau Intl Airport to St. Louis

    The lowest priced Air Canada flight from Montreal Pierre Elliott Trudeau Intl Airport to St. Louis from the last 72 hours was C$ 572. Generally, Air Canada has 4 flights on this route every week with an average price of C$ 777. Air Canada is rated 7.1/10 by our users.

Why use momondo?

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

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Montreal to St. Louis. momondo saves you time and could save you money on your trip.

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

momondo does allow users to show only those flights to St. Louis from Montreal which offer a flexible booking policy as well as other useful filters and features.

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

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to St. Louis from Montreal.

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

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