What is the cheapest airline that flies from Lambert-St Louis to Montreal?

Delta is the most popular carrier operating from Lambert-St Louis to Montreal

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.

C$ 196 Cheap Flights from St. Louis to Montreal in 2026

1 adult

Save money when you book flights with momondo

Big names, great deals

Search 100s of travel sites to compare prices.

Filter for what you want

Free Wi-Fi? Early arrival? Instantly customize your results

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Not ready to book? to track prices.

Search flight deals

Find the cheapest flights from St. Louis to Montreal

Round-trip

One-way

Last minute

Direct

Cheap round-trip flights

Enter your travel dates to find the best prices.

3:49 p.m. - 12:30 a.m.

STL

YUL

7h 41m

1 stop

5:25 p.m. - 11:59 p.m.

YUL

STL

31h 34m

2 stops

C$ 456Multiple Airlines

mar., 24 feb. - mié., 4 mar.

3:49 p.m. - 12:30 a.m.

STL

YUL

7h 41m

1 stop

5:25 p.m. - 7:02 a.m.

YUL

STL

14h 37m

2 stops

C$ 503Multiple Airlines

mar., 24 feb. - vie., 6 mar.

3:49 p.m. - 5:00 p.m.

STL

YUL

24h 11m

2 stops

4:35 p.m. - 7:02 a.m.

YUL

STL

15h 27m

1 stop

C$ 539Multiple Airlines

mié., 25 feb. - vie., 6 mar.

3:49 p.m. - 12:30 a.m.

STL

YUL

7h 41m

1 stop

4:35 p.m. - 7:02 a.m.

YUL

STL

15h 27m

1 stop

C$ 593Multiple Airlines

mar., 24 feb. - vie., 6 mar.

3:49 p.m. - 12:30 a.m.

STL

YUL

7h 41m

1 stop

8:00 a.m. - 11:19 p.m.

YUL

STL

16h 19m

2 stops

C$ 604Multiple Airlines

lun., 2 mar. - vie., 13 mar.

3:49 p.m. - 12:30 a.m.

STL

YUL

7h 41m

1 stop

6:45 a.m. - 1:34 p.m.

YUL

STL

31h 49m

2 stops

C$ 640Multiple Airlines

dom., 1 mar. - jue., 12 mar.

3:49 p.m. - 12:30 a.m.

STL

YUL

7h 41m

1 stop

12:52 p.m. - 4:42 p.m.

YUL

STL

4h 50m

1 stop

C$ 679Multiple Airlines

mar., 24 feb. - mié., 4 mar.

3:49 p.m. - 12:30 a.m.

STL

YUL

7h 41m

1 stop

8:00 a.m. - 11:19 p.m.

YUL

STL

16h 19m

2 stops

C$ 698Multiple Airlines

dom., 1 mar. - vie., 13 mar.

3:49 p.m. - 12:38 a.m.

STL

YUL

31h 49m

2 stops

4:35 p.m. - 10:27 p.m.

YUL

STL

30h 52m

1 stop

C$ 701Multiple Airlines

mar., 17 feb. - mar., 24 feb.

3:49 p.m. - 12:30 a.m.

STL

YUL

7h 41m

1 stop

7:00 a.m. - 1:34 p.m.

YUL

STL

7h 34m

1 stop

C$ 705Multiple Airlines

lun., 2 mar. - vie., 13 mar.

United Airlines flights from St. Louis to Montreal

Our best United Airlines deals on St. Louis to Montreal flight tickets

United Airlines

18 Feb

STL8:17 a.m.Lambert-St Louis

9h 23m

1 stop

YUL6:40 p.m.Montreal Pierre Elliott Trudeau Intl

25 Feb

YUL1:10 p.m.Montreal Pierre Elliott Trudeau Intl

9h 30m

1 stop

STL9:40 p.m.Lambert-St Louis

C$ 769

United Airlines

17 Feb

STL9:55 a.m.Lambert-St Louis

7h 45m

1 stop

YUL6:40 p.m.Montreal Pierre Elliott Trudeau Intl

24 Feb

YUL4:45 p.m.Montreal Pierre Elliott Trudeau Intl

18h 51m

1 stop

STL10:36 a.m.Lambert-St Louis

C$ 783

United Airlines

19 Feb

STL6:25 a.m.Lambert-St Louis

8h 36m

1 stop

YUL4:01 p.m.Montreal Pierre Elliott Trudeau Intl

26 Feb

YUL1:10 p.m.Montreal Pierre Elliott Trudeau Intl

9h 30m

1 stop

STL9:40 p.m.Lambert-St Louis

C$ 788

Air Canada flights from St. Louis to Montreal

Our best Air Canada deals on St. Louis to Montreal flight tickets

Air Canada

2 May

STL1:00 p.m.Lambert-St Louis

2h 35m

YUL4:35 p.m.Montreal Pierre Elliott Trudeau Intl

8 May

YUL6:10 p.m.Montreal Pierre Elliott Trudeau Intl

2h 55m

STL8:05 p.m.Lambert-St Louis

C$ 771

Air Canada

2 May

STL1:00 p.m.Lambert-St Louis

2h 35m

YUL4:35 p.m.Montreal Pierre Elliott Trudeau Intl

8 May

YUL6:00 a.m.Montreal Pierre Elliott Trudeau Intl

7h 06m

1 stop

STL12:06 p.m.Lambert-St Louis

C$ 789

Air Canada

2 May

STL7:30 a.m.Lambert-St Louis

4h 51m

1 stop

YUL1:21 p.m.Montreal Pierre Elliott Trudeau Intl

8 May

YUL7:30 a.m.Montreal Pierre Elliott Trudeau Intl

5h 36m

1 stop

STL12:06 p.m.Lambert-St Louis

C$ 809

Fly from

Fly to

Route

Depart

Return

Price

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

mar. 24/2

3:49 p.m.-12:30 a.m.

1 stop7h 41m

Montreal Pierre Elliott Trudeau Intl

mié. 4/3

5:25 p.m.-11:59 p.m.

2 stops31h 34m

C$ 456

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

mar. 24/2

3:49 p.m.-12:30 a.m.

1 stop7h 41m

Montreal Pierre Elliott Trudeau Intl

vie. 6/3

5:25 p.m.-7:02 a.m.

2 stops14h 37m

C$ 503

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

mié. 25/2

3:49 p.m.-5:00 p.m.

2 stops24h 11m

Montreal Pierre Elliott Trudeau Intl

vie. 6/3

4:35 p.m.-7:02 a.m.

1 stop15h 27m

C$ 539

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

mar. 24/2

3:49 p.m.-12:30 a.m.

1 stop7h 41m

Montreal Pierre Elliott Trudeau Intl

vie. 6/3

4:35 p.m.-7:02 a.m.

1 stop15h 27m

C$ 593

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

lun. 2/3

3:49 p.m.-12:30 a.m.

1 stop7h 41m

Montreal Pierre Elliott Trudeau Intl

vie. 13/3

8:00 a.m.-11:19 p.m.

2 stops16h 19m

C$ 604

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

dom. 1/3

3:49 p.m.-12:30 a.m.

1 stop7h 41m

Montreal Pierre Elliott Trudeau Intl

jue. 12/3

6:45 a.m.-1:34 p.m.

2 stops31h 49m

C$ 640

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

mar. 24/2

3:49 p.m.-12:30 a.m.

1 stop7h 41m

Montreal Pierre Elliott Trudeau Intl

mié. 4/3

12:52 p.m.-4:42 p.m.

1 stop4h 50m

C$ 679

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

dom. 1/3

3:49 p.m.-12:30 a.m.

1 stop7h 41m

Montreal Pierre Elliott Trudeau Intl

vie. 13/3

8:00 a.m.-11:19 p.m.

2 stops16h 19m

C$ 698

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

mar. 17/2

3:49 p.m.-12:38 a.m.

2 stops31h 49m

Montreal Pierre Elliott Trudeau Intl

mar. 24/2

4:35 p.m.-10:27 p.m.

1 stop30h 52m

C$ 701

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

lun. 2/3

3:49 p.m.-12:30 a.m.

1 stop7h 41m

Montreal Pierre Elliott Trudeau Intl

vie. 13/3

7:00 a.m.-1:34 p.m.

1 stop7h 34m

C$ 705

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

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

Prices

Airlines

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 39% 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	Thu, 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 Thursday, 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?
momondo data reveals that the most frequently booked plane model on the route from St. Louis to Montreal is Boeing 787-8 Dreamliner, representing 43.33% of all bookings. The subsequent popular models are Boeing 787-10 Dreamliner at 6.67%, Airbus A220-300 at 6.67%, and Canadair (Bombardier) Regional Jet 900 at 6.67%.

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.