STL - YUL

C$ 187 Find Cheap Flights from St. Louis to Montreal

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from St. Louis to Montreal departing on 14/10. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy

KAYAK searches hundreds of travel sites at once for deals on flights to Montreal Pierre Elliott Trudeau Intl Airport

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from St. Louis to Montreal, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from St. Louis to Montreal, as well as popular online travel agencies
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Flights Deals

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

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from St. Louis to Montreal that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

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

Tue, 2 Sep - Tue, 9 Sep
American Airlines Logo
8:01 p.m. - 11:45 a.m.STL-YUL
14h 44m1 stop
American Airlines Logo
12:31 p.m. - 8:32 p.m.YUL-STL
9h 01m1 stop
C$ 454American Airlines
Find Deal
Sat, 4 Oct - Wed, 8 Oct
American Airlines Logo
5:25 p.m. - 4:33 p.m.STL-YUL
22h 08m1 stop
American Airlines Logo
12:30 p.m. - 11:54 p.m.YUL-STL
12h 24m1 stop
C$ 455American Airlines
Find Deal
Sat, 30 Aug - Mon, 8 Sep
American Airlines Logo
7:23 a.m. - 4:42 p.m.STL-YUL
8h 19m1 stop
American Airlines Logo
5:15 p.m. - 9:26 a.m.YUL-STL
17h 11m1 stop
C$ 458American Airlines
Find Deal
Thu, 18 Sep - Tue, 23 Sep
American Airlines Logo
7:23 a.m. - 4:33 p.m.STL-YUL
8h 10m1 stop
American Airlines Logo
12:31 p.m. - 8:32 p.m.YUL-STL
9h 01m1 stop
C$ 459American Airlines
Find Deal
Sat, 9 Aug - Wed, 13 Aug
American Airlines Logo
7:23 a.m. - 4:42 p.m.STL-YUL
8h 19m1 stop
American Airlines Logo
12:30 p.m. - 8:52 p.m.YUL-STL
9h 22m1 stop
C$ 461American Airlines
Find Deal
Wed, 3 Sep - Sat, 13 Sep
United Airlines Logo
6:35 a.m. - 5:26 p.m.STL-YUL
9h 51m1 stop
United Airlines Logo
8:20 a.m. - 3:44 p.m.YUL-STL
8h 24m1 stop
C$ 548United Airlines
Find Deal
Mon, 8 Sep - Fri, 12 Sep
United Airlines Logo
5:30 p.m. - 10:40 a.m.STL-YUL
16h 10m1 stop
United Airlines Logo
6:40 p.m. - 10:40 a.m.YUL-STL
17h 00m1 stop
C$ 552United Airlines
Find Deal
Thu, 14 Aug - Sun, 17 Aug
Logo
2:30 p.m. - 12:30 p.m.STL-YUL
21h 00m3 stops
Logo
4:45 p.m. - 1:32 p.m.YUL-STL
21h 47m3 stops
C$ 557
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Thu, 14 Aug - Sat, 16 Aug
Logo
2:30 p.m. - 12:30 p.m.STL-YUL
21h 00m3 stops
Logo
1:10 p.m. - 1:32 p.m.YUL-STL
25h 22m3 stops
C$ 582
Find Deal
Thu, 4 Sep - Tue, 9 Sep
Delta Logo
6:00 a.m. - 4:07 p.m.STL-YUL
9h 07m1 stop
Delta Logo
6:00 a.m. - 3:29 p.m.YUL-STL
10h 29m1 stop
C$ 587Delta
Find Deal
Expert advice

Expert advice for your flight from St. Louis to Montreal

 
Snippets provided in this section are AI-generated based on a summarisation of KAYAK-commissioned articles. The articles are presented as-is, for general informational purposes only, and may not be up-to-date. The opinions contained in the articles are original to the author and reflect their authentic experience, which may vary significantly from the experience of others.
KAYAK teamed up with top travel experts to share the best tips for your journey.
Airlines
Air Canada

Air Canada offers priority check-in for higher fare classes and elite status members.


Air Canada’s Wi-Fi is available on select flights; check availability five days before departure.

Read more about Air Canadaby Stefanie Waldek
United Airlines

United offers Priority Boarding to avoid gate-checking carry-ons, placing you in Zone 2.


United's Wi-Fi varies; T-Mobile customers often get free streaming Wi-Fi.

Read more about United Airlinesby Stefanie Waldek
Airports
STL

Avoid peak hours at STL to minimize wait times. Early mornings and afternoons are busiest, especially at Terminal 2.

Read more about STLby Yulia Denisyuk
YUL

Take the 747 bus from YUL to downtown Montréal. It's affordable and runs 24/7, though it can be crowded.

Read more about YULby Brandon Schultz
Our travel experts
Stefanie Waldek

Stefanie Waldek

Expert on Air Canada and United Airlines

Stefanie Waldek

Stefanie Waldek

Stefanie Waldek is a freelance space, travel, and design writer based in Saratoga Springs, NY. Her words have appeared in Space.com, Travel + Leisure, Condé Nast Traveler, Architectural Digest, and House Beautiful, among other publications. An expert in aviation and expedition cruising, Stefanie is frequently up in the air or on the sea, likely en route to Antarctica or the Arctic.

Read more
Brandon Schultz

Brandon Schultz

Expert on YUL

Brandon Schultz

Brandon Schultz

Brandon travels every week and makes friends with stray cats wherever he goes. Dogs, too... he once brought one home to the US from the Amalfi Coast. He’s written 6 books, visited 6 continents (still waiting on Antarctica), and would eat ice cream 6 times a day if he could. He lives in Brooklyn, New York, with his partner and three cats.

Read more
Yulia Denisyuk

Yulia Denisyuk

Expert on STL

Yulia Denisyuk

Yulia Denisyuk

Yulia is a freelance journalist who’s dispatched from 90+ countries. Her work focuses on cultures, adventure trips and air travel, appearing in NatGeo, NYT, CNTraveler, and more. For past assignments, she’s stayed with nomads in Mongolia and learned the art of Imigongo in Rwanda. She’s based in Chicago; in winter she often questions that decision.

Read more
Useful Info

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

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

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

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from St. Louis to Montreal Pierre Elliott Trudeau Intl Airport, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from St. Louis to Montreal Pierre Elliott Trudeau Intl Airport is October, where tickets cost C$ 414 (return) on average. On the other hand, the most expensive months are March and February, where the average cost of round-trip tickets is C$ 1,218 and C$ 1,194 respectively.

Find deals

Good to know

Low seasonJanuary
High seasonJuly
Cheapest flightC$ 187
Best time to beat the crowds but there is an average 8% increase in price.
Most popular time to fly and prices are also 20% lower on average.
Flight from St. Louis to Montreal

When to book flights from St. Louis to Montreal

Are your dates flexible? Find out the best times to travel from St. Louis to Montreal 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.

FAQs for booking St. Louis to Montreal flights

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

    In the last 3 days, the lowest price for a flight from St. Louis to Montreal Pierre Elliott Trudeau Intl Airport was C$ 137 for a one-way ticket and C$ 333 for a round-trip.

  • Which airlines offer Wi-Fi service onboard planes from St. Louis to Montreal?

    All the following airlines offer inflight Wi-Fi service on the St. Louis to Montreal flight route: Lufthansa, United Airlines, Air Canada, American Airlines, Japan Airlines, and Finnair.

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

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

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

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

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

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

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

    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 St. Louis to Montreal.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Montreal from St. Louis 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 St. Louis to Montreal?

    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 Montreal with an airline and back to St. Louis with another airline.

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

    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 Montreal from St. Louis up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

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

  • Looking for a cheap flight? 25% of our users found flights on this route for C$ 792 or less round-trip.

Prefer to fly direct from St. Louis to Montreal?

 
Direct data is based off flight results for the next 60 days. Find direct flights from all airlines flying direct from Lambert-St Louis to Montreal Pierre Elliott Trudeau Intl.
Find which airlines fly direct from Lambert-St Louis Airport to Montreal Pierre Elliott Trudeau Intl Airport, which days they fly and book direct flights.

Direct departures

Lambert-St Louis to Montreal Pierre Elliott Trudeau Intl

Monday

Air Canada,United Airlines

Air Canada,United Airlines

Tuesday

Air Canada,United Airlines

Air Canada,United Airlines

Wednesday

Air Canada,United Airlines

Air Canada,United Airlines

Thursday

Air Canada,United Airlines

Air Canada,United Airlines

Friday

Air Canada,United Airlines

Air Canada,United Airlines

Saturday

Air Canada,United Airlines

Air Canada,United Airlines

Sunday

Air Canada,United Airlines

Air Canada,United Airlines

See more nonstop flights

Direct returns

Montreal Pierre Elliott Trudeau Intl to Lambert-St Louis

Monday

Air Canada,United Airlines

Air Canada,United Airlines

Tuesday

Air Canada,United Airlines

Air Canada,United Airlines

Wednesday

Air Canada,United Airlines

Air Canada,United Airlines

Thursday

Air Canada,United Airlines

Air Canada,United Airlines

Friday

Air Canada,United Airlines

Air Canada,United Airlines

Saturday

Air Canada,United Airlines

Air Canada,United Airlines

Sunday

Air Canada,United Airlines

Air Canada,United Airlines

See more nonstop flights

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

Information on your arrival and departure airports

St. Louis (STL)
Pierre Elliott Trudeau Intl (YUL)

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