STL - YUL

C$ 365 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 22/12. 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, 0 bags

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
Travellers love KAYAK
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Everything you should know

Cheapest round-trip
C$ 487
Overall average: C$ 1,775
American Airlines
Mon 2/2Wed 4/2
STL - YUL • 1 stop
Cheapest direct flights
C$ 1,253
Air Canada
Wed 3/6Sun 14/6
STL - YUL • Direct
Our travellers' advice
AI-powered summary based on content written by travel experts. AI can make mistakes.
United's Priority Boarding helps with carry-on space.
Avoid peak hours at STL to minimize wait times.
Expert advice
Expert advice
Expert advice
Expert advice
When to travel
July
Cheapest • 49% price drop
July
Most popular
Good to know
Good to know
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+1
Good to know
Good to know
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KAYAK searches hundreds of sites at once to find you the best travel deals.
We hope you love your trip to Montreal!
Flight Deals
Booking Insights
Expert advice
Flight 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

Mon, 2 Feb - Wed, 4 Feb
American Airlines Logo
6:44 p.m. - 3:08 p.m.
STL
-
YUL
19h 24m1 stop
American Airlines Logo
3:50 p.m. - 10:20 a.m.
YUL
-
STL
19h 30m1 stop
C$ 487American Airlines
Mon, 2 Feb - Wed, 4 Feb
American Airlines Logo
11:05 a.m. - 10:59 p.m.
STL
-
YUL
10h 54m2 stops
American Airlines Logo
3:50 p.m. - 10:20 a.m.
YUL
-
STL
19h 30m1 stop
C$ 500American Airlines
Mon, 2 Feb - Wed, 4 Feb
American Airlines Logo
11:05 a.m. - 10:59 p.m.
STL
-
YUL
10h 54m2 stops
American Airlines Logo
7:30 a.m. - 6:14 p.m.
YUL
-
STL
11h 44m2 stops
C$ 508American Airlines
Sun, 11 Jan - Sun, 18 Jan
Multiple Airlines Logo
12:37 p.m. - 7:05 a.m.
STL
-
YUL
17h 28m2 stops
Multiple Airlines Logo
4:35 p.m. - 10:34 p.m.
YUL
-
STL
30h 59m1 stop
C$ 582Multiple Airlines
Thu, 26 Feb - Mon, 2 Mar
American Airlines Logo
6:00 a.m. - 3:05 p.m.
STL
-
YUL
8h 05m1 stop
American Airlines Logo
3:55 p.m. - 9:29 a.m.
YUL
-
STL
18h 34m1 stop
C$ 591American Airlines
Sat, 31 Jan - Mon, 2 Feb
Multiple Airlines Logo
12:12 p.m. - 12:30 a.m.
STL
-
YUL
11h 18m1 stop
Multiple Airlines Logo
6:45 a.m. - 11:33 p.m.
YUL
-
STL
17h 48m2 stops
C$ 592Multiple Airlines
Fri, 16 Jan - Sun, 18 Jan
Multiple Airlines Logo
1:35 p.m. - 7:05 a.m.
STL
-
YUL
16h 30m2 stops
Multiple Airlines Logo
4:35 p.m. - 7:54 a.m.
YUL
-
STL
16h 19m1 stop
C$ 686Multiple Airlines
Wed, 18 Mar - Sun, 22 Mar
Multiple Airlines Logo
12:14 p.m. - 7:05 a.m.
STL
-
YUL
17h 51m2 stops
Multiple Airlines Logo
4:35 p.m. - 7:07 a.m.
YUL
-
STL
15h 32m1 stop
C$ 732Multiple Airlines
Thu, 15 Jan - Sun, 18 Jan
Multiple Airlines Logo
5:11 p.m. - 12:43 a.m.
STL
-
YUL
30h 32m2 stops
Multiple Airlines Logo
4:35 p.m. - 7:54 a.m.
YUL
-
STL
16h 19m1 stop
C$ 735Multiple Airlines
Thu, 29 Jan - Thu, 5 Feb
Multiple Airlines Logo
10:01 p.m. - 7:05 a.m.
STL
-
YUL
32h 04m2 stops
Multiple Airlines Logo
12:50 p.m. - 6:51 a.m.
YUL
-
STL
19h 01m1 stop
C$ 738Multiple Airlines
Booking Insights

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.

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 July, where tickets cost C$ 490 (return) on average. On the other hand, the most expensive months are February and March, where the average cost of round-trip tickets is C$ 1,775 and C$ 1,112 respectively.

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

The average round-trip price for all non-stop flights, flights with one layover, and flights with two layovers for the route found by users searching on KAYAK in the last 2 weeks.

Yes, flying with a layover may cost you more time, but you can also save money on the route, with a 1 stop layover the cheapest option at C$ 340 on average.

Find deals
Expert advice

Expert advice for your flight from St. Louis to Montreal

 
AI-powered summary based on content written by travel experts. AI can make mistakes.
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

Good to know

Low seasonFebruary
Cheapest flightC$ 354
Best time to beat the crowds but there is an average 83% increase in price.
Most popular time to fly and prices are also 50% 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$ 183 for a one-way ticket and C$ 487 for a round-trip.

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

    United Airlines, Lufthansa, and Japan Airlines offer inflight Wi-Fi service on the St. Louis to Montreal flight route.

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

    The Boeing 787-8 Dreamliner is the aircraft model that flies most regularly on the St. Louis to Montreal flight route.

  • 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.

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)