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

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The best prices from Lambert-St Louis to Montreal are usually found in October or September, booked 49 days in advance, depart on a Thursday or Tuesday and return on a Friday

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 2022: compare St. Louis to Montreal flight prices with the expected peak season, weather and rainfall in Montreal.
STL - YMQ
Price
$366 - $760
YMQ
Temperature
15.8 - 71.6 °F
YMQ
Rainfall
2.5 - 4.4 inches

Popular in

August

High demand for flights, 37% potential price rise

Cheapest in

October

Best time to find cheap flights, 24% potential price drop

Round-trip from

$366

From Lambert-St Louis to Montreal (YMQ)

One-way from

$252

One-way flight from Lambert-St Louis to Montreal (YMQ)

Flight route prices based on searches on Cheapflights within the last 3 days, monthly prices based on aggregated historical data.
When is the cheapest time to fly from St. Louis to Montreal (STL - YMQ)?

A simple way to save on the total cost of your ticket is to fly from St. Louis to Montreal in the morning. If you’re flexible enough to do this you can expect to save up to 13% on your trip compared to booking a flight in the afternoon.

How far in advance should I book a flight from St. Louis to Montreal?

Users have found that booking a flight from St. Louis to Montreal at least 48 days early can save you up to 35% on average compared to booking a flight this week. If booking 48 days before your flight isn’t an option for you, users have found flights from St. Louis to Montreal for as little as $528 when booking for a departure date within the next two weeks. You can also check prices now. Some users have found airline tickets as low as $582 for flights departing within the next 3 days.

What is the cheapest day to fly round-trip from St. Louis to Montreal?

Leaving on a Wednesday is a viable option for saving on travel. Heavily demanded days of the week can typically drive up the prices you see. Booking your travel for a less competitive day can save up to 43% on the overall cost on flights from St. Louis to Montreal.

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

Flights from St. Louis to Montreal lean towards being more expensive in August. Prices are generally better when you fly from St. Louis to Montreal in October, with the cheapest ticket starting at $248.

Cheap flights from St. Louis to Montreal in June, July 2022

The best prices found for STL to YMQ flights for June, July
26 Jul - 29 Jul
$500pp
STL
Lambert-St Louis
American Airlines
   
2 STOPS
YUL
Montreal Pierre Elliott Trudeau Intl
YUL
Montreal Pierre Elliott Trudeau Intl
American Airlines
 
1 STOP
STL
Lambert-St Louis
29 Jul - 3 Aug
$505pp
STL
Lambert-St Louis
Multiple Airlines
 
1 STOP
YUL
Montreal Pierre Elliott Trudeau Intl
YUL
Montreal Pierre Elliott Trudeau Intl
American Airlines
 
1 STOP
STL
Lambert-St Louis
18 Jul - 22 Jul
$510pp
STL
Lambert-St Louis
American Airlines
   
2 STOPS
YUL
Montreal Pierre Elliott Trudeau Intl
YUL
Montreal Pierre Elliott Trudeau Intl
American Airlines
 
1 STOP
STL
Lambert-St Louis

Lambert-St Louis to Montreal 2022 flight deals

Cheap flights to Montreal from St. Louis found for this year
27 Aug - 8 Sep
$464pp
STL
Lambert-St Louis
American Airlines
 
1 STOP
YUL
Montreal Pierre Elliott Trudeau Intl
YUL
Montreal Pierre Elliott Trudeau Intl
American Airlines
 
1 STOP
STL
Lambert-St Louis
18 Aug - 22 Aug
$470pp
STL
Lambert-St Louis
American Airlines
 
1 STOP
YUL
Montreal Pierre Elliott Trudeau Intl
YUL
Montreal Pierre Elliott Trudeau Intl
American Airlines
 
1 STOP
STL
Lambert-St Louis
22 Aug - 26 Aug
$471pp
STL
Lambert-St Louis
American Airlines
 
1 STOP
YUL
Montreal Pierre Elliott Trudeau Intl
YUL
Montreal Pierre Elliott Trudeau Intl
American Airlines
 
1 STOP
STL
Lambert-St Louis

Last minute flights from St. Louis to Montreal

Late deals on round-trip flights to Montreal from St. Louis, departing today and this week
1 Jul - 8 Jul
$607pp
STL
Lambert-St Louis
American Airlines
 
1 STOP
YUL
Montreal Pierre Elliott Trudeau Intl
YUL
Montreal Pierre Elliott Trudeau Intl
American Airlines
 
1 STOP
STL
Lambert-St Louis
2 Jul - 6 Jul
$658pp
STL
Lambert-St Louis
Air Canada
 
1 STOP
YUL
Montreal Pierre Elliott Trudeau Intl
YUL
Montreal Pierre Elliott Trudeau Intl
Air Canada
 
1 STOP
STL
Lambert-St Louis
2 Jul - 6 Jul
$662pp
STL
Lambert-St Louis
Delta
 
1 STOP
YUL
Montreal Pierre Elliott Trudeau Intl
YUL
Montreal Pierre Elliott Trudeau Intl
Delta
 
1 STOP
STL
Lambert-St Louis

One-way flights to Montreal from St. Louis

The cheapest one-way flights from St. Louis to Montreal
3:27 am - 6:20 pm
American Airlines
1 Stop
13h 53m
STL - YUL
American Airlines
3:10 am - 5:01 pm
American Airlines
1 Stop
12h 51m
STL - YUL
American Airlines
9:40 am - 5:01 pm
American Airlines
1 Stop
6h 21m
STL - YUL
American Airlines

Related info for your journey

Useful info, stats and facts about <span class="emphasized">St. Louis</span> to <span class="emphasized">Montreal</span> flights.

Flight FAQs

From St. Louis to Montreal

What airport do you fly from for flights from St. Louis to Montreal?

Most people fly from Lambert-St Louis (STL) if they book a flight from St. Louis to Montreal. On average, Lambert-St Louis has 0 outbound flights to Montreal per day from 5 airlines. Lambert-St Louis is conveniently located just 12.7 mi from St. Louis’s city center.

Which airlines flying from Lambert-St Louis to Montreal have flexible cancellations due to COVID-19?

Some of our airline partners flying from Lambert-St Louis to Montreal have new flexible policies in place due to COVID-19. American Airlines, WestJet, and Delta are some of the carriers where you may find flexible cancellation policies. You can use our site to filter for airlines like American Airlines with this kind of flexibility.

Can I find flights from St. Louis to Montreal for under $500 on Cheapflights?

Yes, there are multiple flights from St. Louis to Montreal for under $500. The cheapest flight booked recently is on American Airlines for just $464, but on average you can expect to pay $494.

Are there last-minute flights available from St. Louis to Montreal for under $700?

There are currently 20+ open flights from St. Louis to Montreal within the next 7 days for less than $700.

What is the cheapest airline to fly from St. Louis to Montreal round-trip?

Cheapflights users have booked flights from St. Louis to Montreal round-trip from $464. American Airlines is currently priced 3% below the average price you’ll pay for this route.

What are the cheapest flights from St. Louis to Montreal?

Looking at all options, your cheapest flight can be booked for $265. While the most popular route (Lambert-St Louis - Montreal Pierre Elliott Trudeau Intl) can be booked for $481 on average our data indicates $476 when flying from St. Louis to Montreal.

What are the most popular airlines that fly from St. Louis to Montreal?

Before booking your flight from St. Louis to Montreal check out the most popular airlines for this route: American Airlines, Air Canada or Delta.

COVID Restrictions

View COVID Travel Restrictions for Montreal, Canada

Do I need a COVID test to fly to Montreal from St. Louis?

Information is based on travel restrictions from Lambert-St Louis to Montreal

Most visitors from Lambert-St Louis need to provide a negative COVID-19 test result and/or quarantine to enter Montreal.

COVID-19 testing requirements
Visitors from Lambert-St Louis must present a negative RT-PCR (NAAT) or Antigen (quick-test) test taken 72 hours for RT-PCR (NAAT) and 1 day for Antigen (quick-test) before departing to Montreal.

Quarantine requirements
Visitors from Lambert-St Louis are not required to quarantine after entering Montreal.

Do I need a test to fly back to St. Louis from Montreal?

Returning to Lambert-St Louis from Montreal

COVID-19 testing requirements
Visitors from Montreal are not required to present a negative COVID-19 PCR test or antigen result upon entering Lambert-St Louis.

Quarantine requirements
Visitors from Montreal are not required to quarantine after entering Lambert-St Louis.

Hide COVID Travel Restrictions for Montreal, Canada

Destination information for Montreal

Things to know before you go - useful duration and weather info for your trip from St. Louis to Montreal.
Today's exchange rate
$1 = C$ 1.30
Average temperature for June in Montreal
77.0 °F
Avg rainfall for June in Montreal
3.2 ″

Airports servicing St. Louis

Airports servicing Montreal

Montreal Pierre Elliott Trudeau Intl (YUL)
Montreal St Hubert (YHU)

Top 5 airlines flying from Lambert-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.
Airline Cheapest Average Flexibility On-time COVID-19 safety
United Airlines
$158 $381 No cancel fee 69%
Air Canada
$168 $408 No cancel fee 67%
WestJet
$183 $333 No cancel fee 60%
Delta
$247 $542 No cancel fee N/A
American Airlines
$297 $542 No cancel fee 71%
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