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Cheap flights from Montreal Pierre Elliott Trudeau Intl Airport to St. Louis from C$ 282

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 17/6. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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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.
American Airlines Logo
5:33 p.m. - 11:54 p.m.
YUL
-
STL
7h 21m
1 stop
American Airlines Logo
7:30 a.m. - 10:59 p.m.
STL
-
YUL
14h 29m
1 stop
C$ 599American Airlines
Fri, 22 May - Fri, 29 May
Air Canada Logo
7:00 a.m. - 12:06 p.m.
YUL
-
STL
6h 06m
1 stop
Air Canada Logo
1:05 p.m. - 4:40 p.m.
STL
-
YUL
2h 35mdirect
C$ 600Air Canada
Thu, 21 May - Mon, 25 May
Air Canada Logo
6:30 p.m. - 8:25 p.m.
YUL
-
STL
2h 55mdirect
Air Canada Logo
7:05 a.m. - 3:26 p.m.
STL
-
YUL
7h 21m
2 stops
C$ 606Air Canada
Thu, 21 May - Mon, 25 May
American Airlines Logo
12:30 p.m. - 4:30 p.m.
YUL
-
STL
5h 00m
1 stop
American Airlines Logo
2:56 p.m. - 9:50 a.m.
STL
-
YUL
17h 54m
1 stop
C$ 607American Airlines
Fri, 29 May - Mon, 1 Jun
Air Canada Logo
6:30 p.m. - 8:25 p.m.
YUL
-
STL
2h 55mdirect
Air Canada Logo
1:05 p.m. - 4:40 p.m.
STL
-
YUL
2h 35mdirect
C$ 617Air Canada
Mon, 25 May - Fri, 29 May
Air Canada Logo
6:30 p.m. - 8:25 p.m.
YUL
-
STL
2h 55mdirect
Air Canada Logo
1:05 p.m. - 4:40 p.m.
STL
-
YUL
2h 35mdirect
C$ 618Air Canada
Sun, 24 May - Mon, 15 Jun
Air Canada Logo
3:40 p.m. - 8:09 p.m.
YUL
-
STL
5h 29m
1 stop
Air Canada Logo
1:05 p.m. - 4:40 p.m.
STL
-
YUL
2h 35mdirect
C$ 619Air Canada
Fri, 22 May - Fri, 29 May
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$ 622Air Canada
Fri, 31 Jul - Mon, 3 Aug
Delta Logo
12:49 p.m. - 9:09 p.m.
YUL
-
STL
9h 20m
1 stop
Delta Logo
6:04 p.m. - 11:13 p.m.
STL
-
YUL
4h 09m
1 stop
C$ 625Delta
Sun, 24 May - Sat, 30 May
United Airlines Logo
9:15 a.m. - 6:13 p.m.
YUL
-
STL
9h 58m
2 stops
United Airlines Logo
6:00 a.m. - 12:13 a.m.
STL
-
YUL
17h 13m
2 stops
C$ 626United Airlines
Fri, 22 May - Fri, 29 May

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
24 May
YUL12:49 p.m.Montreal Pierre Elliott Trudeau Intl
9h 20m
1 stop
STL9:09 p.m.Lambert-St Louis
30 May
STL6:04 p.m.Lambert-St Louis
4h 09m
1 stop
YUL11:13 p.m.Montreal Pierre Elliott Trudeau Intl
C$ 625
Delta
25 Jun
YUL6:50 p.m.Montreal Pierre Elliott Trudeau Intl
6h 06m
1 stop
STL11:56 p.m.Lambert-St Louis
29 Jun
STL6:30 a.m.Lambert-St Louis
8h 41m
1 stop
YUL4:11 p.m.Montreal Pierre Elliott Trudeau Intl
C$ 636
Delta
31 Jul
YUL6:47 p.m.Montreal Pierre Elliott Trudeau Intl
6h 06m
1 stop
STL11:53 p.m.Lambert-St Louis
2 Aug
STL6:30 a.m.Lambert-St Louis
8h 50m
1 stop
YUL4:20 p.m.Montreal Pierre Elliott Trudeau Intl
C$ 647

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
21 May
YUL7:00 a.m.Montreal Pierre Elliott Trudeau Intl
6h 06m
1 stop
STL12:06 p.m.Lambert-St Louis
25 May
STL1:05 p.m.Lambert-St Louis
2h 35m
YUL4:40 p.m.Montreal Pierre Elliott Trudeau Intl
C$ 600
Air Canada
21 May
YUL6:30 p.m.Montreal Pierre Elliott Trudeau Intl
2h 55m
STL8:25 p.m.Lambert-St Louis
25 May
STL7:05 a.m.Lambert-St Louis
7h 21m
2 stops
YUL3:26 p.m.Montreal Pierre Elliott Trudeau Intl
C$ 606
Air Canada
25 May
YUL6:30 p.m.Montreal Pierre Elliott Trudeau Intl
2h 55m
STL8:25 p.m.Lambert-St Louis
29 May
STL1:05 p.m.Lambert-St Louis
2h 35m
YUL4:40 p.m.Montreal Pierre Elliott Trudeau Intl
C$ 617

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 7 May 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

MontrealSt. Louis

YUL - STL

YULSTL

Montreal Pierre Elliott Trudeau Intl

Fri 22/5

5:33 p.m.-11:54 p.m.

1 stop7h 21m

Lambert-St Louis

Fri 29/5

7:30 a.m.-10:59 p.m.

1 stop14h 29m

C$ 599

MontrealSt. Louis

YUL - STL

YULSTL

Montreal Pierre Elliott Trudeau Intl

Thu 21/5

7:00 a.m.-12:06 p.m.

1 stop6h 06m

Lambert-St Louis

Mon 25/5

1:05 p.m.-4:40 p.m.

Nonstop2h 35m

C$ 600

MontrealSt. Louis

YUL - STL

YULSTL

Montreal Pierre Elliott Trudeau Intl

Thu 21/5

6:30 p.m.-8:25 p.m.

Nonstop2h 55m

Lambert-St Louis

Mon 25/5

7:05 a.m.-3:26 p.m.

2 stops7h 21m

C$ 606

MontrealSt. Louis

YUL - STL

YULSTL

Montreal Pierre Elliott Trudeau Intl

Fri 29/5

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

1 stop5h 00m

Lambert-St Louis

Mon 1/6

2:56 p.m.-9:50 a.m.

1 stop17h 54m

C$ 607

MontrealSt. Louis

YUL - STL

YULSTL

Montreal Pierre Elliott Trudeau Intl

Mon 25/5

6:30 p.m.-8:25 p.m.

Nonstop2h 55m

Lambert-St Louis

Fri 29/5

1:05 p.m.-4:40 p.m.

Nonstop2h 35m

C$ 617

MontrealSt. Louis

YUL - STL

YULSTL

Montreal Pierre Elliott Trudeau Intl

Sun 24/5

6:30 p.m.-8:25 p.m.

Nonstop2h 55m

Lambert-St Louis

Mon 15/6

1:05 p.m.-4:40 p.m.

Nonstop2h 35m

C$ 618

MontrealSt. Louis

YUL - STL

YULSTL

Montreal Pierre Elliott Trudeau Intl

Fri 22/5

3:40 p.m.-8:09 p.m.

1 stop5h 29m

Lambert-St Louis

Fri 29/5

1:05 p.m.-4:40 p.m.

Nonstop2h 35m

C$ 619
Quickest round-trip

MontrealSt. Louis

YUL - STL

YULSTL

Montreal Pierre Elliott Trudeau Intl

Fri 31/7

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

Nonstop2h 47m

Lambert-St Louis

Mon 3/8

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

Nonstop2h 32m

C$ 622

MontrealSt. Louis

YUL - STL

YULSTL

Montreal Pierre Elliott Trudeau Intl

Sun 24/5

12:49 p.m.-9:09 p.m.

1 stop9h 20m

Lambert-St Louis

Sat 30/5

6:04 p.m.-11:13 p.m.

1 stop4h 09m

C$ 625

MontrealSt. Louis

YUL - STL

YULSTL

Montreal Pierre Elliott Trudeau Intl

Fri 22/5

9:15 a.m.-6:13 p.m.

2 stops9h 58m

Lambert-St Louis

Fri 29/5

6:00 a.m.-12:13 a.m.

2 stops17h 13m

C$ 626

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 June is, on average, the cheapest month to fly to St. Louis from Montreal Pierre Elliott Trudeau Intl Airport, with most prices found around C$ 730. If you don’t want to visit St. Louis in June, then you should wait until September to fly from Montreal Pierre Elliott Trudeau Intl Airport, when ticket prices are also cheap, with an average price of C$ 731.

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

Can stopping save me money on Montreal Pierre Elliott Trudeau Intl Airport to St. Louis flights?

You could potentially save up to 22% 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

Every day

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 every day.
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$ 583Free CancellationRating
7.1
11,004 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$ 583. Generally, Air Canada has 7 flights on this route every week with an average price of C$ 825. 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.

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