Cheap Flights from Montreal to St. Louis from C$ 431

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

All the information you need to plan the best YMQ to STL flight in 2022: compare Montreal to St. Louis flight prices with the expected peak season, weather and rainfall in St. Louis.

YMQ - STL Price	C$ 222 - C$ 369
STL Temperature	0 - 27 °C
STL Rainfall	56 - 119 mm

Popular in September High demand for flights, 19% potential price rise
Cheapest in August Best time to find cheap flights, 26% potential price drop
Average price C$ 304 Average for round-trip flights in May 2022
Round-trip from C$ 285 From Montreal (YMQ) to Lambert-St Louis

Popular in

September

High demand for flights, 19% potential price rise

Cheapest in

August

Best time to find cheap flights, 26% potential price drop

Average price

C$ 304

Average for round-trip flights in May 2022

Round-trip from

C$ 285

From Montreal (YMQ) to Lambert-St Louis

Flight route prices based on searches on Cheapflights within the last 3 days, monthly prices based on aggregated historical data.

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

Users have found that flying from Montreal to St. Louis on a Saturday typically leans towards higher prices. However, this doesn’t mean you still can’t find a deal. Flexibility with other aspects of your flight can still land a great price for your trip.

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

Flights from Montreal to St. Louis lean towards being more expensive in September. Prices are generally better when you fly from Montreal to St. Louis in August, with the cheapest ticket starting at C$ 144.

When is the cheapest time to fly from Montreal to St. Louis (YMQ - STL)?

Unlike in the morning, when flights are generally more expensive, you can save up to 3% on flights from Montreal to St. Louis by exploring options for tickets in the afternoon.

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

When searching for a good deal, it’s best to be prepared for potential fluctuations in price. We recommend booking at least 54 days in advance, which can save you up to 55% on flights from Montreal to St. Louis compared to booking the week you need them. Waiting 54 days out may not be for everyone, so we have options available for flights within the next two weeks, with the lowest price starting at C$ 465. For sooner than that we have options available in the next 3 days from C$ 547.

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

The best prices found for YMQ to STL flights for May, June

2 Jun - 5 Jun

C$ 628pp

YUL

Montreal Pierre Elliott Trudeau Intl

Delta

1 STOP

STL

Lambert-St Louis

STL

Lambert-St Louis

Delta

1 STOP

YUL

Montreal Pierre Elliott Trudeau Intl

20 May - 21 May

C$ 643pp

YUL

Montreal Pierre Elliott Trudeau Intl

American Airlines

1 STOP

STL

Lambert-St Louis

STL

Lambert-St Louis

American Airlines

1 STOP

YUL

Montreal Pierre Elliott Trudeau Intl

17 Jun - 24 Jun

C$ 663pp

YUL

Montreal Pierre Elliott Trudeau Intl

American Airlines

1 STOP

STL

Lambert-St Louis

STL

Lambert-St Louis

American Airlines

1 STOP

YUL

Montreal Pierre Elliott Trudeau Intl

Montreal to St. Louis 2022 flight deals

Cheap flights to St. Louis from Montreal found for this year

6 Aug - 13 Aug

C$ 521pp

YUL

Montreal Pierre Elliott Trudeau Intl

Air Canada

1 STOP

STL

Lambert-St Louis

STL

Lambert-St Louis

Air Canada

1 STOP

YUL

Montreal Pierre Elliott Trudeau Intl

6 Jul - 8 Jul

C$ 580pp

YUL

Montreal Pierre Elliott Trudeau Intl

Multiple Airlines

1 STOP

STL

Lambert-St Louis

STL

Lambert-St Louis

Air Canada

1 STOP

YUL

Montreal Pierre Elliott Trudeau Intl

6 Jul - 8 Jul

C$ 589pp

YUL

Montreal Pierre Elliott Trudeau Intl

Delta

1 STOP

STL

Lambert-St Louis

STL

Lambert-St Louis

Delta

1 STOP

YUL

Montreal Pierre Elliott Trudeau Intl

One-way flights to Lambert-St Louis from Montreal

The cheapest one-way flights from Montreal to St. Louis

10:45 a.m. - 3:36 a.m.

Multiple Airlines

3 stops

17h 51m

YUL - STL

C$ 431

Kiwi.com

1:10 p.m. - 5:03 a.m.

Delta

2 stops

16h 53m

YUL - STL

C$ 448

Delta

3:00 a.m. - 1:52 p.m.

WestJet

2 stops

11h 52m

YUL - STL

C$ 471

WestJet

Related info for your journey

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

Flight FAQs

From Montreal to St. Louis

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

Most people fly into Lambert-St Louis (STL) if they book a flight to St. Louis from Montreal. On average, Lambert-St Louis has 0 inbound flights from Montreal per day from 4 airlines. Lambert-St Louis is conveniently located just 20.4 km from St. Louis’s city centre.

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

Due to the rapidly changing circumstances due to COVID-19, airlines like American Airlines, Delta, and Air Canada flying from Montreal to Lambert-St Louis have implemented new flexible cancellation policies.

Can I find flights from Montreal to St. Louis for under C$ 600 on Cheapflights?

Yes, there are multiple flights from Montreal to St. Louis for under C$ 600. The cheapest flight booked recently is on Air Canada for just C$ 521, but on average you can expect to pay C$ 758.

What are the cheapest airlines flying from Montreal to St. Louis round-trip?

Currently priced at C$ 521, Air Canada will fly you from Montreal to St. Louis and back. In addition to Air Canada, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from Delta and American Airlines - these airlines can fly you to your destination from C$ 589 and C$ 663, respectively.

What are the cheapest airlines to fly from Montreal to St. Louis one-way?

To fly one-way, consider booking your trip with Delta, which is currently one of the cheapest options available, starting at C$ 282. Air Canada flights start at C$ 285 while deals on American Airlines start at C$ 290 one-way.

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

Looking at all options, your cheapest flight can be booked for C$ 616. While the most popular route (Montreal Pierre Elliott Trudeau Intl - Lambert-St Louis) can be booked for C$ 498 on average our data indicates C$ 616 when flying from Montreal to St. Louis.

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

Consider American Airlines, Air Canada or Delta when booking your flight. These represent the most popular airlines when flying from Montreal to St. Louis.

COVID Restrictions

View COVID Travel Restrictions for St. Louis, MO

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

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

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

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

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

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

Returning to Montreal from Lambert-St Louis

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.

Hide COVID Travel Restrictions for St. Louis, MO

Destination information for St. Louis

Things to know before you go - useful duration and weather info for your trip from Montreal to St. Louis.

C$ 1 = $0.78

26.0 °C

130.0 mm

Airports servicing Montreal

Montreal Pierre Elliott Trudeau Intl (YUL)

Montreal St Hubert (YHU)

Airports servicing St. Louis

St. Louis (STL)

Airline	Cheapest	Average	Flexibility	On-time
Delta	C$ 236	C$ 588	No cancel fee	N/A	Search Delta flights
Air Canada	C$ 237	C$ 546	No cancel fee	67%	Search Air Canada flights
United Airlines	C$ 306	C$ 536	No cancel fee	69%	Search United Airlines flights
American Airlines	C$ 414	C$ 548	No cancel fee	71%	Search American Airlines flights

Cheap flights from Montreal to St. Louis

The best prices from Montreal to Lambert-St Louis are usually found in August or April, booked 53 days in advance, depart on a Saturday or Friday and return on a Wednesday

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

All the information you need to plan the best YMQ to STL flight in 2022: compare Montreal to St. Louis flight prices with the expected peak season, weather and rainfall in St. Louis.

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

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

When is the cheapest time to fly from Montreal to St. Louis (YMQ - STL)?

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

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

The best prices found for YMQ to STL flights for May, June

Montreal to St. Louis 2022 flight deals

Cheap flights to St. Louis from Montreal found for this year

One-way flights to Lambert-St Louis from Montreal

The cheapest one-way flights from Montreal to St. Louis

Related info for your journey

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

Flight FAQs

From Montreal to St. Louis

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

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

Can I find flights from Montreal to St. Louis for under C$ 600 on Cheapflights?

What are the cheapest airlines flying from Montreal to St. Louis round-trip?

What are the cheapest airlines to fly from Montreal to St. Louis one-way?

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

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

Related searches

Flights to St. Louis (STL) from Montreal

Other flights from Montreal

Other flights to St. Louis

Rent a Car

COVID Restrictions

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

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

Destination information for St. Louis

Things to know before you go - useful duration and weather info for your trip from Montreal to St. Louis.

Airports servicing Montreal

Airports servicing St. Louis

Top 4 airlines flying from Montreal to Lambert-St Louis

The chart below displays the airlines Cheapflights users travelling from Montreal to St. Louis choose most often. Cheapest and average prices are based on aggregated data from the past 12 months.

Popular flight searches

Check out other popular destinations found by fellow travellers in 2022.

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