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Cheap flights from Montreal Pierre Elliott Trudeau Intl Airport to St. Louis from C$ 303

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 5/5. 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

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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.
Delta Logo
7:41 p.m. - 12:05 p.m.
YUL
-
STL
17h 24m
1 stop
Delta Logo
5:27 p.m. - 8:40 a.m.
STL
-
YUL
14h 13m
1 stop
C$ 620Delta
Fri, 1 May - Tue, 5 May
Delta Logo
7:41 p.m. - 12:05 p.m.
YUL
-
STL
17h 24m
1 stop
Delta Logo
6:05 a.m. - 6:51 p.m.
STL
-
YUL
11h 46m
1 stop
C$ 621Delta
Fri, 1 May - Tue, 5 May
Delta Logo
7:41 p.m. - 6:23 p.m.
YUL
-
STL
23h 42m
1 stop
Delta Logo
6:05 a.m. - 6:51 p.m.
STL
-
YUL
11h 46m
1 stop
C$ 623Delta
Fri, 1 May - Tue, 5 May
Delta Logo
6:00 a.m. - 9:42 a.m.
YUL
-
STL
4h 42m
1 stop
Delta Logo
9:59 a.m. - 5:40 p.m.
STL
-
YUL
6h 41m
1 stop
C$ 632Delta
Mon, 20 Apr - Tue, 28 Apr
Delta Logo
6:45 p.m. - 11:36 p.m.
YUL
-
STL
5h 51m
1 stop
Delta Logo
5:59 p.m. - 11:08 p.m.
STL
-
YUL
4h 09m
1 stop
C$ 634Delta
Mon, 20 Apr - Sat, 25 Apr
Delta Logo
6:45 p.m. - 11:36 p.m.
YUL
-
STL
5h 51m
1 stop
Delta Logo
5:35 p.m. - 11:26 p.m.
STL
-
YUL
4h 51m
1 stop
C$ 635Delta
Mon, 20 Apr - Tue, 28 Apr
Delta Logo
6:45 p.m. - 11:36 p.m.
YUL
-
STL
5h 51m
1 stop
Delta Logo
6:04 p.m. - 8:39 a.m.
STL
-
YUL
13h 35m
2 stops
C$ 668Delta
Fri, 24 Apr - Sat, 30 May
Delta Logo
12:42 p.m. - 9:19 p.m.
YUL
-
STL
9h 37m
1 stop
Delta Logo
6:48 a.m. - 11:59 a.m.
STL
-
YUL
4h 11m
1 stop
C$ 682Delta
Fri, 24 Apr - Fri, 1 May
Delta Logo
6:45 p.m. - 11:36 p.m.
YUL
-
STL
5h 51m
1 stop
Delta Logo
5:36 p.m. - 11:41 p.m.
STL
-
YUL
5h 05m
1 stop
C$ 686Delta
Fri, 24 Apr - Sat, 30 May
Delta Logo
6:45 p.m. - 11:36 p.m.
YUL
-
STL
5h 51m
1 stop
Delta Logo
6:48 a.m. - 6:51 p.m.
STL
-
YUL
11h 03m
2 stops
C$ 692Delta
Fri, 17 Apr - Tue, 21 Apr

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

Our best WestJet deals on Montreal Pierre Elliott Trudeau Intl Airport to St. Louis flight tickets
WestJet
1 Sep
YUL7:00 a.m.Montreal Pierre Elliott Trudeau Intl
6h 53m
1 stop
STL12:53 p.m.Lambert-St Louis
30 Sep
STL10:45 a.m.Lambert-St Louis
4h 16m
1 stop
YUL4:01 p.m.Montreal Pierre Elliott Trudeau Intl
C$ 731
WestJet
10 May
YUL7:00 a.m.Montreal Pierre Elliott Trudeau Intl
6h 20m
1 stop
STL12:20 p.m.Lambert-St Louis
16 May
STL6:04 p.m.Lambert-St Louis
4h 09m
1 stop
YUL11:13 p.m.Montreal Pierre Elliott Trudeau Intl
C$ 733
WestJet
24 Apr
YUL7:00 a.m.Montreal Pierre Elliott Trudeau Intl
11h 44m
1 stop
STL5:44 p.m.Lambert-St Louis
1 May
STL6:05 a.m.Lambert-St Louis
11h 15m
2 stops
YUL6:20 p.m.Montreal Pierre Elliott Trudeau Intl
C$ 755

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
1 May
YUL7:41 p.m.Montreal Pierre Elliott Trudeau Intl
17h 24m
1 stop
STL12:05 p.m.Lambert-St Louis
5 May
STL5:27 p.m.Lambert-St Louis
14h 13m
1 stop
YUL8:40 a.m.Montreal Pierre Elliott Trudeau Intl
C$ 620
Delta
1 May
YUL7:41 p.m.Montreal Pierre Elliott Trudeau Intl
17h 24m
1 stop
STL12:05 p.m.Lambert-St Louis
5 May
STL6:05 a.m.Lambert-St Louis
11h 46m
1 stop
YUL6:51 p.m.Montreal Pierre Elliott Trudeau Intl
C$ 621
Delta
1 May
YUL7:41 p.m.Montreal Pierre Elliott Trudeau Intl
23h 42m
1 stop
STL6:23 p.m.Lambert-St Louis
5 May
STL6:05 a.m.Lambert-St Louis
11h 46m
1 stop
YUL6:51 p.m.Montreal Pierre Elliott Trudeau Intl
C$ 623

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 26 March 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 1/5

7:41 p.m.-12:05 p.m.

1 stop17h 24m

Lambert-St Louis

Tue 5/5

5:27 p.m.-8:40 a.m.

1 stop14h 13m

C$ 620

MontrealSt. Louis

YUL - STL

YULSTL

Montreal Pierre Elliott Trudeau Intl

Fri 1/5

7:41 p.m.-12:05 p.m.

1 stop17h 24m

Lambert-St Louis

Tue 5/5

6:05 a.m.-6:51 p.m.

1 stop11h 46m

C$ 621

MontrealSt. Louis

YUL - STL

YULSTL

Montreal Pierre Elliott Trudeau Intl

Fri 1/5

7:41 p.m.-6:23 p.m.

1 stop23h 42m

Lambert-St Louis

Tue 5/5

6:05 a.m.-6:51 p.m.

1 stop11h 46m

C$ 623

MontrealSt. Louis

YUL - STL

YULSTL

Montreal Pierre Elliott Trudeau Intl

Mon 20/4

6:00 a.m.-9:42 a.m.

1 stop4h 42m

Lambert-St Louis

Tue 28/4

9:59 a.m.-5:40 p.m.

1 stop6h 41m

C$ 632
Quickest round-trip

MontrealSt. Louis

YUL - STL

YULSTL

Montreal Pierre Elliott Trudeau Intl

Mon 20/4

6:45 p.m.-11:36 p.m.

1 stop5h 51m

Lambert-St Louis

Sat 25/4

5:59 p.m.-11:08 p.m.

1 stop4h 09m

C$ 634

MontrealSt. Louis

YUL - STL

YULSTL

Montreal Pierre Elliott Trudeau Intl

Mon 20/4

6:45 p.m.-11:36 p.m.

1 stop5h 51m

Lambert-St Louis

Tue 28/4

5:35 p.m.-11:26 p.m.

1 stop4h 51m

C$ 635

MontrealSt. Louis

YUL - STL

YULSTL

Montreal Pierre Elliott Trudeau Intl

Fri 24/4

6:45 p.m.-11:36 p.m.

1 stop5h 51m

Lambert-St Louis

Sat 30/5

6:04 p.m.-8:39 a.m.

2 stops13h 35m

C$ 668

MontrealSt. Louis

YUL - STL

YULSTL

Montreal Pierre Elliott Trudeau Intl

Fri 24/4

12:42 p.m.-9:19 p.m.

1 stop9h 37m

Lambert-St Louis

Fri 1/5

6:48 a.m.-11:59 a.m.

1 stop4h 11m

C$ 682

MontrealSt. Louis

YUL - STL

YULSTL

Montreal Pierre Elliott Trudeau Intl

Fri 24/4

6:45 p.m.-11:36 p.m.

1 stop5h 51m

Lambert-St Louis

Sat 30/5

5:36 p.m.-11:41 p.m.

1 stop5h 05m

C$ 686

MontrealSt. Louis

YUL - STL

YULSTL

Montreal Pierre Elliott Trudeau Intl

Fri 17/4

6:45 p.m.-11:36 p.m.

1 stop5h 51m

Lambert-St Louis

Tue 21/4

6:48 a.m.-6:51 p.m.

2 stops11h 03m

C$ 692

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 April is, on average, the cheapest month to fly to St. Louis from Montreal Pierre Elliott Trudeau Intl Airport, with most prices found around C$ 671. If you don’t want to visit St. Louis in April, then you should wait until May to fly from Montreal Pierre Elliott Trudeau Intl Airport, when ticket prices are also cheap, with an average price of C$ 703.

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

Our data shows that Wednesday is the least expensive day to fly to St. Louis. Tickets to fly out on this day can be as low as C$ 757. The most expensive day to fly to St. Louis is Saturday, with ticket prices averaging around C$ 926.

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 to Lambert-St Louis flights?

There is only 1 cabin class available to choose from on Montreal Pierre Elliott Trudeau Intl to Lambert-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 55% 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 47m

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 47m
Direct flights go from Montreal Pierre Elliott Trudeau Intl Airport to St. Louis on Monday, Tuesday, Wednesday, Thursday, Friday and Saturday. The only airline offering direct flights is Air Canada.
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

  • 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 47m.

  • 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$ 599Free CancellationRating
7.1
10,844 reviews
Search Air Canada flights
WestJetPriceFrom C$ 742Free CancellationRating
7.2
3,302 reviews
Search WestJet flights

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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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