How long does a flight from Montreal to St. Louis take?

The average direct flight takes 2h 47m , covering a distance of 2,504 km.

How many flights are there between Montreal Pierre Elliott Trudeau Intl Airport and St. Louis per day?

There is a maximum of 1 nonstop flight a day that takes off from Montreal Pierre Elliott Trudeau Intl Airport and lands in St. Louis, with an average flight time of 2h 47m. The most common departure time is 4:00 p.m. and most flights take off in the afternoon. Each week, there are 7 flights.

What’s the earliest departure time from Montreal to St. Louis?

Early birds can take the earliest flight from Montreal Pierre Elliott Trudeau Intl Airport at 4:55 pm and will be landing in St. Louis at 6:42 pm.

Which airlines fly direct between Montreal Pierre Elliott Trudeau Intl Airport and St. Louis?

There is just one airline that flies from Montreal Pierre Elliott Trudeau Intl Airport to St. Louis direct and that is Air Canada . The best round-trip deal found from Air Canada for the route is C$ 558.

Which aircraft models fly most regularly from Montreal to St. Louis?

The Canadair (Bombardier) Regional Jet 900 is the aircraft model that flies most regularly on the Montreal to St. Louis flight route.

Which airline alliances offer flights from Montreal to St. Louis?

Star Alliance is the only airline alliance operating flights between Montreal and St. Louis.

On which days can I fly direct from Montreal to St. Louis?

There are direct flights from Montreal to St. Louis on a daily basis.

How does KAYAK find such low prices on flights from Montreal to St. Louis?

KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Montreal to St. Louis.

How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Montreal to St. Louis?

KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to St. Louis from Montreal is likely to change within 7 days, so travellers know whether to wait or book now.

What is the Hacker Fare option on flights from Montreal to St. Louis?

Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to St. Louis with an airline and back to Montreal with another airline.

What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Montreal to St. Louis?

Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to St. Louis from Montreal up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

What is the cheapest layover airport when flying from Montreal to St. Louis?

Flights via Toronto (YYZ) offer the most affordable fares, with an average round-trip price of C$ 932.

What is the most popular layover airport when flying from Montreal to St. Louis?

Toronto (YYZ) is the top choice – 62% of KAYAK users who clicked on one-stop flights from Montreal to St. Louis picked an itinerary connecting there.

Which layover airport has the quickest connection when flying from Montreal to St. Louis?

If you prefer a quick connection, Detroit (DTW) often has the shortest layovers from Montreal to St. Louis, with an average of 0h 52m .

Which layover airport offers the shortest total travel time from Montreal to St. Louis?

Consider flying via Detroit (DTW) for the shortest journey. The average one-way travel time for flights connecting there is 4h 40m .

Which cabin class options are there for flights between Montreal Pierre Elliott Trudeau Intl Airport and St. Louis?

There are 2 cabin class options for the route. These are Business and Economy . Perform a search on KAYAK to find the latest prices and availability for all cabin fares, which differ across airlines.

Which airlines provide the cheapest flights from Montreal to St. Louis?

In the past 5 days, the cheapest round-trip tickets from Montreal to St. Louis were found on American Airlines (C$ 587) and United Airlines (C$ 727).

C$ 309 CHEAP FLIGHTS from Montreal to St. Louis (YUL - STL)

Save 21% or more on flights. Compare deals from all over the web.

Never overpay with our price tracking tools.

Filter searches by price, airline and more to find your best flights.

Cheapest round-trip

C$ 587

Typical prices: C$ 770-C$ 870

American Airlines

Fri 18/9Mon 21/9

YUL - STL • 1 stop

Cheapest direct flights

C$ 731

Air Canada

Wed 14/10Wed 21/10

YUL - STL • Direct

Direct flights

Every day

You can fly direct with Air Canada. Average duration is 2h 47m

Direct flights

Top layover airports

Toronto (YYZ)

Cheapest • Avg C$ 932 (round-trip)

Detroit (DTW)

Shortest trip • 4h 40m (one-way)

Insights

When to travel

August

Cheapest • 30% price drop

May

Most popular

Good to know

Start a new search

KAYAK searches hundreds of sites at once to find you the best travel deals.

We hope you love your trip to St. Louis!

Flight Deals

Cheap Flights from Montreal to St. Louis (YUL-STL)

Discover the best prices for you by selecting your travel dates on KAYAK.

Round-trip

One-way

Direct

Recent round-trip flight deals from Montreal to St. Louis

Fri, 18 Sep - Mon, 21 Sep

5:34 p.m. - 10:18 a.m.YUL Montreal Pierre Elliott Trudeau Intl-STL Lambert-St Louis

17h 44m1 stop Chicago O'Hare Intl

5:18 p.m. - 11:44 a.m.STL Lambert-St Louis-YUL Montreal Pierre Elliott Trudeau Intl

17h 26m1 stop Chicago O'Hare Intl

C$ 587American Airlines

Wed, 28 Oct - Sat, 31 Oct

12:30 p.m. - 12:19 a.m.YUL Montreal Pierre Elliott Trudeau Intl-STL Lambert-St Louis

12h 49m1 stop Chicago O'Hare Intl

7:29 a.m. - 4:52 p.m.STL Lambert-St Louis-YUL Montreal Pierre Elliott Trudeau Intl

8h 23m1 stop Chicago O'Hare Intl

C$ 591American Airlines

Wed, 14 Oct - Wed, 21 Oct

5:34 p.m. - 10:50 a.m.YUL Montreal Pierre Elliott Trudeau Intl-STL Lambert-St Louis

18h 16m1 stop Chicago O'Hare Intl

7:29 a.m. - 4:52 p.m.STL Lambert-St Louis-YUL Montreal Pierre Elliott Trudeau Intl

8h 23m1 stop Chicago O'Hare Intl

C$ 595American Airlines

Tue, 6 Oct - Tue, 3 Nov

5:34 p.m. - 10:50 a.m.YUL Montreal Pierre Elliott Trudeau Intl-STL Lambert-St Louis

18h 16m1 stop Chicago O'Hare Intl

8:15 p.m. - 11:25 a.m.STL Lambert-St Louis-YUL Montreal Pierre Elliott Trudeau Intl

14h 10m1 stop Chicago O'Hare Intl

C$ 601American Airlines

Thu, 15 Oct - Mon, 19 Oct

12:30 p.m. - 12:19 a.m.YUL Montreal Pierre Elliott Trudeau Intl-STL Lambert-St Louis

12h 49m1 stop Chicago O'Hare Intl

5:27 p.m. - 11:44 a.m.STL Lambert-St Louis-YUL Montreal Pierre Elliott Trudeau Intl

17h 17m1 stop Chicago O'Hare Intl

C$ 681American Airlines

Fri, 18 Sep - Mon, 21 Sep

5:34 p.m. - 10:18 a.m.YUL Montreal Pierre Elliott Trudeau Intl-STL Lambert-St Louis

17h 44m1 stop Chicago O'Hare Intl

4:37 p.m. - 9:49 a.m.STL Lambert-St Louis-YUL Montreal Pierre Elliott Trudeau Intl

16h 12m1 stop New York LaGuardia

C$ 681American Airlines

Fri, 18 Sep - Mon, 21 Sep

5:34 p.m. - 10:18 a.m.YUL Montreal Pierre Elliott Trudeau Intl-STL Lambert-St Louis

17h 44m1 stop Chicago O'Hare Intl

4:37 p.m. - 9:49 a.m.STL Lambert-St Louis-YUL Montreal Pierre Elliott Trudeau Intl

16h 12m1 stop New York LaGuardia

C$ 683American Airlines

Mon, 21 Sep - Mon, 28 Sep

12:31 p.m. - 8:44 p.m.YUL Montreal Pierre Elliott Trudeau Intl-STL Lambert-St Louis

9h 13m1 stop Chicago O'Hare Intl

5:18 p.m. - 11:44 a.m.STL Lambert-St Louis-YUL Montreal Pierre Elliott Trudeau Intl

17h 26m1 stop Chicago O'Hare Intl

C$ 685American Airlines

Wed, 14 Oct - Wed, 21 Oct

4:55 p.m. - 6:41 p.m.YUL Montreal Pierre Elliott Trudeau Intl-STL Lambert-St Louis

2h 46mdirect

12:10 p.m. - 3:41 p.m.STL Lambert-St Louis-YUL Montreal Pierre Elliott Trudeau Intl

2h 31mdirect

C$ 731Air Canada

Thu, 15 Oct - Mon, 19 Oct

4:55 p.m. - 6:41 p.m.YUL Montreal Pierre Elliott Trudeau Intl-STL Lambert-St Louis

2h 46mdirect

12:10 p.m. - 3:41 p.m.STL Lambert-St Louis-YUL Montreal Pierre Elliott Trudeau Intl

2h 31mdirect

C$ 738Air Canada

Recent direct flight deals from Montreal to St. Louis

Wed, 14 Oct - Wed, 21 Oct

4:55 p.m. - 6:41 p.m.YUL Montreal Pierre Elliott Trudeau Intl-STL Lambert-St Louis

2h 46mdirect

12:10 p.m. - 3:41 p.m.STL Lambert-St Louis-YUL Montreal Pierre Elliott Trudeau Intl

2h 31mdirect

C$ 731Air Canada

Thu, 15 Oct - Mon, 19 Oct

4:55 p.m. - 6:41 p.m.YUL Montreal Pierre Elliott Trudeau Intl-STL Lambert-St Louis

2h 46mdirect

12:10 p.m. - 3:41 p.m.STL Lambert-St Louis-YUL Montreal Pierre Elliott Trudeau Intl

2h 31mdirect

C$ 738Air Canada

Thu, 15 Oct - Mon, 19 Oct

4:55 p.m. - 6:41 p.m.YUL Montreal Pierre Elliott Trudeau Intl-STL Lambert-St Louis

2h 46mdirect

12:10 p.m. - 3:41 p.m.STL Lambert-St Louis-YUL Montreal Pierre Elliott Trudeau Intl

2h 31mdirect

C$ 739Air Canada

Thu, 24 Sep - Sun, 27 Sep

4:55 p.m. - 6:41 p.m.YUL Montreal Pierre Elliott Trudeau Intl-STL Lambert-St Louis

2h 46mdirect

12:10 p.m. - 3:41 p.m.STL Lambert-St Louis-YUL Montreal Pierre Elliott Trudeau Intl

2h 31mdirect

C$ 741Air Canada

Thu, 24 Sep - Sun, 27 Sep

4:55 p.m. - 6:41 p.m.YUL Montreal Pierre Elliott Trudeau Intl-STL Lambert-St Louis

2h 46mdirect

12:10 p.m. - 3:41 p.m.STL Lambert-St Louis-YUL Montreal Pierre Elliott Trudeau Intl

2h 31mdirect

C$ 745Air Canada

Tue, 6 Oct - Sat, 10 Oct

4:55 p.m. - 6:41 p.m.YUL Montreal Pierre Elliott Trudeau Intl-STL Lambert-St Louis

2h 46mdirect

12:10 p.m. - 3:41 p.m.STL Lambert-St Louis-YUL Montreal Pierre Elliott Trudeau Intl

2h 31mdirect

C$ 845Air Canada

Tue, 6 Oct - Sun, 11 Oct

4:55 p.m. - 6:41 p.m.YUL Montreal Pierre Elliott Trudeau Intl-STL Lambert-St Louis

2h 46mdirect

12:10 p.m. - 3:41 p.m.STL Lambert-St Louis-YUL Montreal Pierre Elliott Trudeau Intl

2h 31mdirect

C$ 845Air Canada

Tue, 6 Oct - Wed, 14 Oct

4:55 p.m. - 6:41 p.m.YUL Montreal Pierre Elliott Trudeau Intl-STL Lambert-St Louis

2h 46mdirect

12:10 p.m. - 3:41 p.m.STL Lambert-St Louis-YUL Montreal Pierre Elliott Trudeau Intl

2h 31mdirect

C$ 845Air Canada

Thu, 8 Oct - Mon, 12 Oct

4:55 p.m. - 6:41 p.m.YUL Montreal Pierre Elliott Trudeau Intl-STL Lambert-St Louis

2h 46mdirect

12:10 p.m. - 3:41 p.m.STL Lambert-St Louis-YUL Montreal Pierre Elliott Trudeau Intl

2h 31mdirect

C$ 1,479United Airlines

Thu, 8 Oct - Mon, 12 Oct

4:55 p.m. - 6:41 p.m.YUL Montreal Pierre Elliott Trudeau Intl-STL Lambert-St Louis

2h 46mdirect

12:10 p.m. - 3:41 p.m.STL Lambert-St Louis-YUL Montreal Pierre Elliott Trudeau Intl

2h 31mdirect

C$ 1,480United Airlines

Booking Insights

KAYAK's insights & trends for Montreal to St. Louis flights

Get data-powered insights and trends into flights from Montreal to St. Louis to help you find the cheapest flights, the best time to fly and much more.

Prices

Airlines

Layovers

How much is a round-trip flight from Montreal Pierre Elliott Trudeau Intl Airport to St. Louis?

Flight prices are below average for this route right now.

Flights to St. Louis from Montreal Pierre Elliott Trudeau Intl Airport usually cost between C$ 664 and C$ 741 in September.
The lowest price found in the past 5 days was C$ 587 on American Airlines (18 Sep–21 Sep).

What is the cheapest month to fly from Montreal Pierre Elliott Trudeau Intl Airport to St. Louis?

The cheapest month for flights from Montreal Pierre Elliott Trudeau Intl Airport to St. Louis is August, where tickets cost C$ 612 (return) on average. On the other hand, the most expensive months are January and December, where the average cost of round-trip tickets is C$ 1,231 and C$ 1,077 respectively.

Can I save money by flying with a layover from Montreal Pierre Elliott Trudeau Intl Airport to St. Louis?

No, with an average price for the route of C$ 1,659, prices are generally cheapest when you fly direct.

Find deals

Low season	January
High season	May
Cheapest flight	C$ 309

Best time to beat the crowds but there is an average 40% increase in price.

Most popular time to fly and prices are also 11% lower on average.

Flight from Montreal to St. Louis

When to book flights from Montreal to St. Louis

Are your dates flexible? Find out the best times to travel from Montreal to St. Louis based on our flight data from the last year. Discover the cheapest month and even day to fly.

Estimated round-trip price

KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

What is the cheapest flight from Montreal Pierre Elliott Trudeau Intl Airport to St. Louis?
In the last 5 days, the lowest price for a flight from Montreal Pierre Elliott Trudeau Intl Airport to St. Louis was C$ 309 for a one-way ticket and C$ 587 for a round-trip.
Which aircraft models fly most regularly from Montreal to St. Louis?
The Canadair (Bombardier) Regional Jet 900 is the aircraft model that flies most regularly on the Montreal to St. Louis flight route.
Which airline alliances offer flights from Montreal to St. Louis?
Star Alliance is the only airline alliance operating flights between Montreal and St. Louis.
On which days can I fly direct from Montreal to St. Louis?
There are direct flights from Montreal to St. Louis on a daily basis.
How does KAYAK find such low prices on flights from Montreal to St. Louis?
KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Montreal to St. Louis.
How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Montreal to St. Louis?
KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to St. Louis from Montreal is likely to change within 7 days, so travellers know whether to wait or book now.
What is the Hacker Fare option on flights from Montreal to St. Louis?
Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to St. Louis with an airline and back to Montreal with another airline.
What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Montreal to St. Louis?
Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to St. Louis from Montreal up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Looking for a cheap flight? 25% of our users found flights on this route for C$ 1,659 or less round-trip.

Direct departures

Montreal Pierre Elliott Trudeau Intl to Lambert-St Louis

Monday

Air Canada

Tuesday

Air Canada

Wednesday

Air Canada

Thursday

Air Canada

Friday

Air Canada

Saturday

Air Canada

Sunday

Air Canada

See more nonstop flights

Direct returns

Lambert-St Louis to Montreal Pierre Elliott Trudeau Intl

Monday

Air Canada

Tuesday

Air Canada

Wednesday

Air Canada

Thursday

Air Canada

Friday

Air Canada

Saturday

Air Canada

Sunday

Air Canada

See more nonstop flights

Everything you need to know for your flight from Montreal to St. Louis

Airports

Cabin class

Complete your trip

Direct Flights

Flights to other cities

Origins

Other airports

Return flight deals

Information on your arrival and departure airports

Montreal (YUL)

St. Louis (STL)

YUL - STL

C$ 309 Find Cheap Flights from Montreal to St. Louis – Compare and Save

Everything you should know

Cheap Flights from Montreal to St. Louis (YUL-STL)

Recent round-trip flight deals from Montreal to St. Louis

Recent one-way flight deals from Montreal to St. Louis

Recent direct flight deals from Montreal to St. Louis

KAYAK's insights & trends for Montreal to St. Louis flights

How much is a round-trip flight from Montreal Pierre Elliott Trudeau Intl Airport to St. Louis?

What is the cheapest month to fly from Montreal Pierre Elliott Trudeau Intl Airport to St. Louis?

Can I save money by flying with a layover from Montreal Pierre Elliott Trudeau Intl Airport to St. Louis?

Which airlines provide the cheapest flights from Montreal to St. Louis?

Which airlines fly direct between Montreal Pierre Elliott Trudeau Intl Airport and St. Louis?

What is the most popular layover airport when flying from Montreal to St. Louis?

What is the cheapest layover airport when flying from Montreal to St. Louis?

Which layover airport offers the shortest total travel time from Montreal to St. Louis?

Which layover airport has the quickest connection when flying from Montreal to St. Louis?

Which cabin class options are there for flights between Montreal Pierre Elliott Trudeau Intl Airport and St. Louis?

How many flights are there between Montreal Pierre Elliott Trudeau Intl Airport and St. Louis per day?

How long does a flight from Montreal to St. Louis take?

What’s the earliest departure time from Montreal to St. Louis?

What’s the latest departure time from Montreal to St. Louis?

Good to know

Low season

High season

Cheapest flight

When to book flights from Montreal to St. Louis

FAQs for booking Montreal to St. Louis flights

KAYAK’s top tips for finding a cheap flight from Montreal Pierre Elliott Trudeau Intl Airport to St. Louis

Prefer to fly direct from Montreal to St. Louis?

Everything you need to know for your flight from Montreal to St. Louis

Information on your arrival and departure airports

Cabin class types available on flights to St. Louis

Complete your trip to St. Louis with a hotel stay or car rental

Find direct flights to and from Montreal and St. Louis

Flights to other popular destinations

Flights from domestic origins to St. Louis

Choose which airport to fly into in Montreal

Find deals for your return flight