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STL - YUL

Find cheap flights from St. Louis to Montreal from $109

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 5/14. 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
0 bags
Thu 5/23
Thu 5/30

Search hundreds of travel sites at once for deals on flights to Montreal

 
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
In the last 7 days travelers have searched 44,632,927 times on KAYAK, and here is why:

Save 22% or moreCompare multiple travel sites with one search.

Track pricesNot ready to book? Create a price alert for when prices drop.

Filter your dealsChoose cabin class, free Wi-Fi and more.

Bundle and saveSave money when you bundle your flight + hotel.

Cheap flight deals 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 and deals for you by selecting your travel dates.
Choose your dates
6:19 pm - 2:00 pmSTL-YUL
18h 41m1 stop
6:45 am - 6:40 pmYUL-STL
12h 55m1 stop
Thu, May 23 - Sun, May 26
7:44 pm - 2:20 pmSTL-YUL
17h 36m1 stop
8:00 am - 5:25 pmYUL-STL
10h 25m1 stop
Sun, Jun 16 - Sun, Jun 23
2:55 pm - 9:15 pmSTL-YUL
5h 20m1 stop
6:10 am - 2:19 pmYUL-STL
9h 09m1 stop
$527Delta
Find Deal
Wed, May 15 - Thu, May 30
6:30 am - 1:16 pmSTL-YUL
5h 46m1 stop
7:30 pm - 9:05 pmYUL-STL
2h 35mnonstop
$545United Airlines
Find Deal
Wed, May 15 - Thu, May 30
1:10 pm - 11:02 pmSTL-YUL
8h 52m1 stop
7:00 am - 8:40 pmYUL-STL
14h 40m1 stop
$551Delta
Find Deal
Mon, Jun 17 - Wed, Jun 19
12:00 pm - 3:23 pmSTL-YUL
2h 23mnonstop
7:30 pm - 9:05 pmYUL-STL
2h 35mnonstop
$563Air Canada
Find Deal
Sat, Jul 20 - Thu, Jul 25
9:50 am - 5:18 pmSTL-YUL
6h 28m1 stop
7:30 pm - 9:05 pmYUL-STL
2h 35mnonstop
$573Air Canada
Find Deal
Sun, May 19 - Sun, May 26
6:40 am - 4:30 pmSTL-YUL
8h 50m2 stops
10:40 am - 9:00 pmYUL-STL
11h 20m2 stops
$577American Airlines
Find Deal
Wed, May 15 - Thu, May 30
11:00 am - 2:23 pmSTL-YUL
2h 23mnonstop
6:15 am - 3:41 pmYUL-STL
10h 26m1 stop
$589United Airlines
Find Deal
Tue, May 21 - Thu, May 30
7:30 am - 10:39 pmSTL-YUL
14h 09m1 stop
10:40 am - 9:00 pmYUL-STL
11h 20m2 stops
$616American Airlines
Find Deal
Sun, May 19 - Sun, May 26

Flights from St. Louis to Montreal - Travel Insights & Trends

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’s the cheapest day of the week to fly from St. Louis to Montreal?

The average price of all flights from St. Louis to Montreal Pierre Elliott Trudeau Intl Airport clicked on KAYAK for each day over the last 12 months.
When flying from St. Louis to Montreal, you should consider leaving on a Monday and avoid Thursdays if you are looking for the best rates. For your return to St. Louis, you’ll find the best rates on Tuesdays and the most expensive ones on Sundays.

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 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 January, where tickets cost $339 on average. On the other hand, the most expensive months are May and September, where the average cost of tickets is $704 and $680 respectively.

How far in advance should I book a flight from St. Louis to Montreal Pierre Elliott Trudeau Intl Airport?

To calculate daily average prices, KAYAK takes all prices for each day before departure over the last year for flights from St. Louis to Montreal Pierre Elliott Trudeau Intl Airport, removes the top 0.1% to account for outliers, and then takes the average of all the values for each month.
To get a below average price on the flight from St. Louis to Montreal Pierre Elliott Trudeau Intl Airport, you should book around 5 days before departure. For the absolute cheapest price, our data suggests you should book 65 days before departure.

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

The cheapest price for the route for each airline clicked by KAYAK users in the last 72 hours.
In the last 72 hours, the best return deals on flights connecting St. Louis to Montreal were found on Delta ($527) and United Airlines ($545). Sun Country Air proposed the cheapest one-way flight at $193.

Which airlines fly non-stop between St. Louis and Montreal Pierre Elliott Trudeau Intl Airport?

Airline and price data is aggregated from results in KAYAK’s search results from the last 2 weeks for flights from St. Louis to Montreal Pierre Elliott Trudeau Intl Airport.
There is just one airline that flies from St. Louis to Montreal Pierre Elliott Trudeau Intl Airport direct and that is Air Canada. The best one-way deal found from Air Canada for the route is $248.

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

There is a maximum of 1 nonstop flight a day that takes off from St. Louis and lands in Montreal Pierre Elliott Trudeau Intl Airport, with an average flight time of 2h 23m. The most common departure time is 11:00 am and most flights take off in the morning. Each week, there are 7 flights.

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

The average price of flights for each cabin class for the route found by users searching on KAYAK over the last 2 weeks.
There are 3 cabin class options for the route. These are Business, Economy and Prem Economy. Perform a search on KAYAK to find the latest prices and availability for all cabin fares, which differ across airlines.

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

Nonstop flights from St. Louis generally make it to Montreal in 2h 23m. The flying distance between the two cities is 967 miles.

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

Early birds can take the earliest flight from St. Louis at 11:00 am and will be landing in Montreal Pierre Elliott Trudeau Intl Airport at 2:23 pm.

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

If you prefer to fly at night, the latest flight from St. Louis to Montreal Pierre Elliott Trudeau Intl Airport jets off at 11:00 am and lands at 2:23 pm.

Good to know

Low season

April

High season

July

Cheapest flight

$109
Best time to beat the crowds with an average 19% drop in price.
Most popular time to fly and prices are also 1% 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 $109 for a one-way ticket and $373 for a round-trip.

  • Do I need a passport to fly between St. Louis and Montreal?

    Yes, you'll most likely have to show a valid passport before boarding the plane in St. Louis and on arrival in Montreal.

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

    Air Canada, Lufthansa, and United 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 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 nonstop flights from St. Louis to Montreal on a daily basis.

  • Which is the best airline for flights from St. Louis to Montreal, Delta or United Airlines?

    The two airlines most popular with KAYAK users for flights from St. Louis to Montreal are Delta and United Airlines. With an average price for the route of $599 and an overall rating of 8.0, Delta is the most popular choice. United Airlines is also a great choice for the route, with an average price of $503 and an overall rating of 7.4.

  • 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 travelers 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. Booking your flights between St. Louis and YUL can sometimes prove cheaper using this method.

  • 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.

See more FAQs

Top tips for finding a cheap flight from STL to Montreal

  • Looking for a cheap flight? 25% of our users found flights on this route for $382 or less one-way and $1,062 or less round-trip.

Prefer to fly non-stop from St. Louis to Montreal?

Find which airlines fly direct from Lambert-St Louis to Pierre Elliott Trudeau Intl, which days they fly and book direct flights.

Nonstop 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 direct flights

Nonstop 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 direct flights
See more direct flights

Top 4 airlines serving from St. Louis to Montreal

 
See real verified KAYAK customer reviews for airlines flying from St. Louis to Montreal. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from St. Louis to Montreal? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
8.0
DeltaOverall score based on 11028 reviews
8.2boarding
7.5food
8.6crew
7.9comfort
8.0entertainment
Airline reviews

On my way home I had a layover. The flight from ATL to CLT was amended 5x while I was waiting. I could have driven home sooner. Overall from Dallas, Tx to Charlotte, NC I started my trip at 4:30pm, I didn’t get home until past midnight. I know things happen, but 5x to make me run back and forth in an airport from different terminals is excessive. I also upgraded to comfort + , I didn’t feel it was worth it. There was no benefit

2.0 MediocreMarisol, Apr 2024DFW - ATL
Read more about Delta reviews

On my way home I had a layover. The flight from ATL to CLT was amended 5x while I was waiting. I could have driven home sooner. Overall from Dallas, Tx to Charlotte, NC I started my trip at 4:30pm, I didn’t get home until past midnight. I know things happen, but 5x to make me run back and forth in an airport from different terminals is excessive. I also upgraded to comfort + , I didn’t feel it was worth it. There was no benefit

On my way home I had a layover. The flight from ATL to CLT was amended 5x while I was waiting. I could have driven home sooner. Overall from Dallas, Tx to Charlotte, NC I started my trip at 4:30pm, I didn’t get home until past midnight. I know things happen, but 5x to make me run back and forth in an airport from different terminals is excessive.

They did a fine job. Can't wait to use Delta in the future.

There was a loud squeaky sound the whole time we were flying.

Had a broken tray in business class. Crew just shrugged it off.

Seat back monitors and outlets were dead and not working.

Everything was great except for the seat. The backrest would not stay in the upright position.

I usually have a positive experience with Delta. Complimentary upgrades are always nice!

Flight delayed about 2 hrs so it made it a VERY late night

The crew, food, and entertainment were all good. But my screen had some sort of bug where if I turned it off, it would turn back on after 2-5 minutes. At full brightness. It made it very hard to get any shut-eye on the overnight flight. Also, the older Boeing plane, while nicely cared for (and no doors fell off 😅👏) doesn't have the nice air quality of newer planes. So I felt a bit greasy by the time we landed in Sweden.

Flight delayed from Cape Town to Washington then got diverted to miami and in miami we had to fend for ourselves , im still trying to get to Shreveport now

delay several times and wait extra long to board. no entertainment service because there are problem for some rows. always encounter some delays for the last flight of the day.

I just wrote a text which was supposed to be for the flight from Denver to spokane not Frankfurt to Denver.

On time every leg of the journey and exceptional staff at counter, gate, and on board. I haven’t travelled in US for a long time and was genuinely surprised how pleasant this was.

Hated every minute of it. This flight should have only taken 1.5hrs but was delayed over 10hours. Now I am being told I cannot be compensated or refunded my ticket price or extra leg room, which I purchased but did not receive, because the airline is throwing the blame on the 3rd party I purchased tickets through and 3rd party putting the blame on airline. No one wants to help. They received their money and that's all they care about. Im going on 3 days of still trying to get to my final destination, had to cancel car rental, car insurance and hotel. Currently staying in airport until hotels open up. Thank you Lufthansa, Kayak, Underpricer and United for making this trip the worst ever.

The delays (5 hrs) were a comedy of errors, and the multiple safety issues encountered were very concerning.

flight delays, staff only communicating when pushed, food service lasting a grand total of 7 minutes, stuck in seat from 45mins into flight until landing

Crew was great and did their best to make us comfortable and captain came out at the beginning to announce why the flight was delayed, weather situation up ahead, and kept us updated throughout the flight.

Aircraft has better leg room than any of United's larger planes. We had requested mobility assistance for this and related flights. United's response to all was superb.

No snacks served! Seating in the kast row in uncomfortable.

The Flight attendant had an attitude and didn't allow anyone any time to prepare for landing despite being absent throughout the entire trip

Flight boarded without pilots. Sat on plane for 3 hrs. after over an hour late boarding. Plane never took off. Had to deplane near midnight. Line for rebooking was 3 hours + long. I had to leave.

The flight was great but board was a nightmare. The gate was changed 4 times during the layover period

The experience was great and much better than the flight going out. of course I was in first class but the service was excellent

Cold air blew constantly on my legs almost making me numb.

Ac was broken so we deplaned, waited 2 hours, taxiing for takeoff they said the plane would not fly so we went back to the gate and got a new plane which took another hour. In all a 4 hour delay for an 80 min flight.

Missed the flight because of them and up geting a rental car

Delayd flight out of atl as always miss my conection in dfw no flight untill next day

Comfort of seats, ease of boarding. Food selection could be better

i suspect i caught flu on this flight as i could hear someone coughing a few rows back and ended up with flu a few days later. also tiresome to have to watch movies on my device by holding up smartphone screen, would have liked to have in seat display.

The late departure Of two hours waitresses, immature, and gossiping

It was upsetting that the flights were canceled but that was due to weather. I did not receive any vouchers for food or a hotel stay when I was forced to spend the night in Montreal. I was also upset when my seat was changed many times.. The plane seemed old with a non-functioning screen and loose side pockets.. All in all in need of updating. On the positive side, the staff in areas was friendly and helpful.

The flight got canceled multiple times and we had to drive their to reach midnight for our next morning interview. Poor and unriable experience. Now have to ask for a refund since we didn't need their rescheduled flight three days later.

I love flying with AC. I love that they have power outlet and free messaging wifi for aeroplan members.

Nice small trip, No food included in ticket, but beverages were for free.

All of our flights got delayed. Fll-Montreal delayed due to technical issues. We got transferred to a Fll-Toronto flight, in Toronto flight got delayed 5 hours causing us to miss our connection to Amman. We are now arriving to Amman 24hours later

In flight wifi that I paid for was very slow and at times didn't work at all.

Flight delayed two and a half hours from Toronto to Calgary Philadelphia to Toronto we were listed as standbys !!! Very concerning

Flight delayed at the last moment Hill next day and havé to drag at Hotel at our cost and bec day was again delayed 4 Times because no crée and no pilot

Flight schedule could be better. Leave Montreal early in the morning and return from LAX later in the day

Book cheap flights from St. Louis to Montreal

Recent one-way flight deals

 
Only flying one-way? Below are some of the best one-way flight deals from St. Louis to Montreal found on KAYAK in the last 72 hours.
5/14Tue
1 stop
26h 26mSTL-YUL
$109
5/14Tue
3 stops
25h 00mSTL-YUL
$161
5/15Wed
1 stopDelta
7h 32mSTL-YUL
$232
7/9Tue
1 stopDelta
8h 52mSTL-YUL
$251
7/5Fri
1 stopAir Canada
7h 34mSTL-YUL
$266
7/5Fri
2 stopsUnited Airlines
15h 44mSTL-YUL
$271
7/17Wed
nonstopAir Canada
2h 23mSTL-YUL
$275
7/6Sat
2 stopsAmerican Airlines
9h 24mSTL-YUL
$289
7/17Wed
2 stopsAmerican Airlines
8h 36mSTL-YUL
$312
7/8Mon
nonstopUnited Airlines
2h 23mSTL-YUL
$371

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Last minute flights from St. Louis to Montreal

Last minute flight, train and bus deals

 
These last-minute flight deals are the cheapest flights found on KAYAK in the last 72 hours for flights from St. Louis to Montreal that are departing in the next 10 days.
4/27Sat
multi-stop
16h 13mSTL-YUL
5/29Wed
multi-stop
14h 10mYUL-STL
$554
4/27Sat
multi-stopWestJet
4h 42mSTL-YUL
5/28Tue
multi-stopWestJet
5h 54mYUL-STL
$690
4/27Sat
multi-stop
5h 45mSTL-YUL
5/29Wed
nonstop
2h 35mYUL-STL
$693
4/27Sat
multi-stopUnited Airlines
8h 51mSTL-YUL
5/28Tue
multi-stopUnited Airlines
5h 11mYUL-STL
$698
4/27Sat
multi-stopUnited Airlines
10h 22mSTL-YUL
5/28Tue
multi-stopUnited Airlines
10h 41mYUL-STL
$805

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St. Louis - Montreal Flights

Departure:

St. Louis (STL)United States

Destination:

Montreal (YUL)Canada

Return flight deals:

Montreal - St. Louis

Cabin classes:

$966
$2,748
$1,829
$599