Cheap flights from St. Louis (STL) to Montreal (YMQ) from $265

This is the cheapest one-way flight price, found on 5/29. Prices may vary by date and flight preferences.
STL — YMQ
Jun 4 — Jun 111

The best prices from Lambert-St Louis to Montreal are usually found in May or March, booked 59 days in advance, depart on a Sunday or Wednesday and return on a Tuesday

How to find the cheapest flight from St. Louis (STL) to Montreal (YMQ)

All the information you need to plan the best STL to YMQ flight in 2023: compare St. Louis to Montreal flight prices with the expected peak season, weather and rainfall in Montreal.

Popular in

June

Cheapest in

May

Round-trip from

$461

One-way from

$267
High demand for flights, 15% potential price rise
Best time to find cheap flights, 23% potential price drop
From Lambert-St Louis to Montreal (YMQ)
One-way flight from Lambert-St Louis to Montreal (YMQ)

STL - YMQ

Price

$461 - $704

YMQ

Temperature

15.8 - 71.6 °F

YMQ

Rainfall

2.5 - 4.4 inches

Cheap flights from St. Louis to Montreal in May, June 2023

The best prices found for STL to YMQ flights for May, June
These are some of the best deals we've found on flights to Montreal in 2023 at this time. Check back regularly for other flight deals.

St. Louis to Montreal 2023 flight deals

Cheap flights to Montreal from St. Louis found for this year
These are some of the best deals we've found on flights to Montreal in 2023 at this time. Check back regularly for other flight deals.

Cheap Delta flights from St. Louis to Montreal

Consider these cheap Delta flights we've found departing from St. Louis to Montreal. Make sure to double check the flight details before booking.

Cheap Air Canada flights from St. Louis to Montreal

Some of the lowest-priced Air Canada flights we've found at this time heading from St. Louis to Montreal. If these deals don't fit your criteria, make sure to check back soon as new deals are always added.

Last minute flights from St. Louis to Montreal

Late deals on return flights to Montreal from St. Louis, departing today and this week
Users seeking a last-minute flight from St. Louis to Montreal should consider booking one of these fares. Users should be sure to double check the price, date, and time of their last-minute flight.

One-way flights to Montreal from St. Louis

The cheapest one-way flights from St. Louis to Montreal
Take a look at some of the best available options we've come across on one-way flights from St. Louis to Montreal. Users needing a return flight from St. Louis to Montreal should utilize the search form above.

Find flights from St. Louis to Montreal within your budget

Use the slider to find flights from St. Louis to Montreal that fit your budget.

Fly from

Any airport

Fly to

Any airport

Budget

$473 - $605

Route

Depart

Return

Price

Lambert-St LouisMontreal Pierre Elliott Trudeau Intl

STL - YUL

STLYUL

Lambert-St Louis

Tue 9/19

1 stop8h 15m

Montreal Pierre Elliott Trudeau Intl

Tue 9/26

2 stops10h 41m

Lambert-St LouisMontreal Pierre Elliott Trudeau Intl

STL - YUL

STLYUL

Lambert-St Louis

Tue 9/19

1 stop8h 15m

Montreal Pierre Elliott Trudeau Intl

Tue 9/26

1 stop8h 54m

Lambert-St LouisMontreal Pierre Elliott Trudeau Intl

STL - YUL

STLYUL

Lambert-St Louis

Tue 7/11

1 stop12h 05m

Montreal Pierre Elliott Trudeau Intl

Tue 7/18

1 stop9h 20m

Lambert-St LouisMontreal Pierre Elliott Trudeau Intl

STL - YUL

STLYUL

Lambert-St Louis

Wed 6/28

1 stop15h 40m

Montreal Pierre Elliott Trudeau Intl

Wed 7/5

1 stop5h 31m

Lambert-St LouisMontreal Pierre Elliott Trudeau Intl

STL - YUL

STLYUL

Lambert-St Louis

Mon 7/10

1 stop4h 51m

Montreal Pierre Elliott Trudeau Intl

Sun 7/16

1 stop4h 31m

Lambert-St LouisMontreal Pierre Elliott Trudeau Intl

STL - YUL

STLYUL

Lambert-St Louis

Thu 10/19

2 stops9h 03m

Montreal Pierre Elliott Trudeau Intl

Thu 10/26

1 stop5h 42m

Lambert-St LouisMontreal Pierre Elliott Trudeau Intl

STL - YUL

STLYUL

Lambert-St Louis

Thu 7/13

1 stop4h 51m

Montreal Pierre Elliott Trudeau Intl

Fri 7/14

1 stop5h 01m

Lambert-St LouisMontreal Pierre Elliott Trudeau Intl

STL - YUL

STLYUL

Lambert-St Louis

Sat 7/22

1 stop12h 59m

Montreal Pierre Elliott Trudeau Intl

Wed 7/26

2 stops20h 22m

Lambert-St LouisMontreal Pierre Elliott Trudeau Intl

STL - YUL

STLYUL

Lambert-St Louis

Wed 6/28

1 stop7h 49m

Montreal Pierre Elliott Trudeau Intl

Sat 7/1

2 stops13h 48m

Flights are sorted by cheapest first

Deals found on 5/29

Reviews of Airlines Servicing Montreal

Read through reviews of airlines operating flights from St. Louis to Montreal, such as Delta, Air Canada and American Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
2,363 reviews

Crew

8.5

Overall

8.0

Entertainment

7.8

Boarding

8.1

Food

7.2

Comfort

7.9

Reviews

1 / 10

Not one mishap. Surprisingly stress free especially compared how the awfulness of air travel rrce

Delta
8.0
Very good
2,363 reviews
Delta
8.0
Very good
2,363 reviews

Crew

8.5

Overall

8.0

Entertainment

7.8

Boarding

8.1

Food

7.2

Comfort

7.9

Reviews

1 / 10

Not one mishap. Surprisingly stress free especially compared how the awfulness of air travel rrce

United Airlines
7.6
Good
1,525 reviews
Delta
8.0
Very good
2,363 reviews

Crew

8.5

Overall

8.0

Entertainment

7.8

Boarding

8.1

Food

7.2

Comfort

7.9

Reviews

1 / 10

Not one mishap. Surprisingly stress free especially compared how the awfulness of air travel rrce

American Airlines
7.4
Good
2,147 reviews
Delta
8.0
Very good
2,363 reviews

Crew

8.5

Overall

8.0

Entertainment

7.8

Boarding

8.1

Food

7.2

Comfort

7.9

Reviews

1 / 10

Not one mishap. Surprisingly stress free especially compared how the awfulness of air travel rrce

WestJet
7.1
Good
618 reviews
Delta
8.0
Very good
2,363 reviews

Crew

8.5

Overall

8.0

Entertainment

7.8

Boarding

8.1

Food

7.2

Comfort

7.9

Reviews

1 / 10

Not one mishap. Surprisingly stress free especially compared how the awfulness of air travel rrce

Air Canada
6.7
Okay
929 reviews
Delta
8.0
Very good
2,363 reviews

Crew

8.5

Overall

8.0

Entertainment

7.8

Boarding

8.1

Food

7.2

Comfort

7.9

Reviews

1 / 10

Not one mishap. Surprisingly stress free especially compared how the awfulness of air travel rrce

Related info for your journey

Useful info, stats and facts about St. Louis to Montreal flights.

Other flights from St. Louis

Top 3 airlines flying from St. Louis to Montreal

The chart below displays the airlines Cheapflights users traveling from St. Louis to Montreal choose most often. Cheapest and average prices are based on aggregated data from the past 12 months.
AirlineCheapestAverageFlexibilityOn-timeCOVID-19 safety
Air CanadaCheapest$238Average$547FlexibilityNo cancel feeOn-time67%COVID-19 safety
Search Air Canada flights
American AirlinesCheapest$244Average$624FlexibilityNo cancel feeOn-time71%COVID-19 safety
Search American Airlines flights
DeltaCheapest$440Average$663FlexibilityNo cancel feeOn-timeN/ACOVID-19 safety
Search Delta flights
100% Free
Cheapflights is completely free to use, so you can start saving the moment you arrive.
Book with Flexibility
Our users can plan ahead with confidence and find flights with no change fees
Travel Smart
Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.