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STL - YUL

Find cheap flights from St. Louis to Montreal from $229

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 6/15. 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
Sat 5/25
Sat 6/1

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 44,979,812 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
6:15 pm - 10:45 amSTL-YUL
15h 30m1 stop
11:45 am - 5:09 pmYUL-STL
6h 24m1 stop
$440Sun Country Air
Find Deal
Sun, Aug 11 - Fri, Aug 16
5:15 pm - 5:55 pmSTL-YUL
23h 40m3 stops
6:50 am - 4:25 pmYUL-STL
10h 35m1 stop
Sat, May 25 - Sat, Jun 1
3:05 pm - 11:31 pmSTL-YUL
7h 26m1 stop
6:10 am - 2:19 pmYUL-STL
9h 09m1 stop
$483Delta
Find Deal
Tue, May 21 - Tue, May 28
3:05 pm - 11:31 pmSTL-YUL
7h 26m1 stop
6:00 am - 5:22 pmYUL-STL
12h 22m2 stops
$492Delta
Find Deal
Tue, May 21 - Tue, May 28
12:00 pm - 3:23 pmSTL-YUL
2h 23mnonstop
7:30 pm - 9:05 pmYUL-STL
2h 35mnonstop
$533Air Canada
Find Deal
Sat, Sep 14 - Sat, Sep 21
12:00 pm - 3:23 pmSTL-YUL
2h 23mnonstop
8:40 am - 3:21 pmYUL-STL
7h 41m2 stops
$534Air Canada
Find Deal
Sun, Aug 11 - Sun, Aug 18
6:30 am - 1:16 pmSTL-YUL
5h 46m1 stop
7:30 pm - 9:05 pmYUL-STL
2h 35mnonstop
$572United Airlines
Find Deal
Tue, May 21 - Tue, May 28
6:16 am - 1:16 pmSTL-YUL
6h 00m1 stop
5:40 pm - 10:45 pmYUL-STL
6h 05m1 stop
$587United Airlines
Find Deal
Sat, Jul 13 - Sat, Jul 20
6:02 am - 4:30 pmSTL-YUL
9h 28m2 stops
10:43 am - 8:20 pmYUL-STL
10h 37m1 stop
$615American Airlines
Find Deal
Thu, Jul 4 - Wed, Jul 10
6:16 am - 4:30 pmSTL-YUL
9h 14m2 stops
10:40 am - 9:00 pmYUL-STL
11h 20m2 stops
$622American Airlines
Find Deal
Wed, May 22 - Wed, May 29

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 Sun Country Air ($440) and Delta ($483). Delta proposed the cheapest one-way flight at $229.

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 $256.

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

$229
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 $229 for a one-way ticket and $440 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 10975 reviews
8.0entertainment
7.9comfort
8.6crew
7.4food
8.2boarding
Airline reviews

Delta is one of the best airlines I have flown

10.0 ExcellentKellie, Apr 2024ANC - SEA
Read more about Delta reviews

Delta is one of the best airlines I have flown

Made the Atlanta to Pittsburgh trip many times, with Delta no issues

I always fly with Delta. My friends tell me their horror stories of flying with other airlines. I just smile and say, “You should fly Delta”

I'm a larger, athletic guy (6'2", 260lbs powerlifter) and I found the seats incredibly uncomfortable with minimal leg room, especially in a window seat. Now, I full understand that being smaller may change my view but even if I was 80lbs less, my legs would be the same size and I was sandwiched between my seat and the seat in front of me.

Horrible. This was not first class. This was a connecting flight whi h was late. My original flight never came. I hated the fact that delta gave me a connecting flight from New York to Orlando Florida. No meals and the television screens were not working. There wasn't even any power to charge your phones. This is NOT FIRST CLASS DELTA!!! Do better next time!

This flight was ridiculous. I had to have a connecting flight from New York to orlando Florida??? The flight left late and because it was a short flight there was no first class amenities. I had one alcohol drink. The flight crew was fine, but it sure did not feel like first class. Delta to me dropped the ball by giving me a connecting flight. By the time we got to Raleigh we would have missed the next flight. Lucky for me the flight never came so now I was stuck waiting for a later flight that came in late also.

Our flight was delayed in Atlanta. The staff could have gave us an explanation for the delay and how long it would be.

I liked the ease of checking in, luggage check in, wheel chair assistance, boarding and flight.

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.

Nothing beats ANA customer service on my opinion. Maybe because of their Japanese culture (and food). Arigatō

So so. Terrible aircraft choice for that leg of the flight.

Due to one crew member not showing up to work, our flight was significantly delayed causing us to miss our connecting flight in Houston to Mississippi causing us to be delayed by more than 6 hours and missing our event all together. Very disappointing. All because ONE crew member called in sick. United did grant us a $15 meal voucher, which was a small but appreciated concession that I wasn’t able to use because I ordered my lunch and paid for it before applying the concession, and the staff said it was too late to use it. Ugh! We also had a TWO delay coming back from Mississippi, but that was on American Airlines and it was due to weather, so not their fault. Anyway, not at all impressed with United’s handling of our flight and the HUGE disappointment of missing our important family event for our 90 year old mother. All that money and all that stress and emotions for nothing. Having to wait the hour to bring an employee from LAX seemed like something that should not have happened. Why don’t you have a local back-up? Santa Ana is not a little airport in a rural area.

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.

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.

Flight was fine, it was delayed but only 30 minutes, staff were efficient, lady making announcements at LAX was really hard to understand but the rest were great.

Flight was canceled 12 hours before take-off due to “weather”

Just get Economy Plus for international flights, so worth it the extra room, bigger seats…

This flight is frequently delayed. The connections seemingly are more frequently delayed. I’ve missed connections as a result twice on the same route to charlotte then Charleston. Final destination arrival has been the next day, twice in a row. No pilots, no crew. Too many excuses. Unfortunately, my days with American are over.

Entertainment was okay not because anything was wrong but it is a short flight so having no wifi is annoying but understandable. Crew was outstanding as usual

It was spectacular. I had basic Economy and was given so much space and their seats lean back so far. Staff was superb, food was superb, everything was superb, Finnair is Fantastic.

Those seats were way too narrow. I had the middle seat, one person was a very skinny person and we still couldn’t avoid touching each other anytime one of us moved. The other person was larger and we were basically sitting in each others lap the entire flight. There was zero entertainment. The flight was long enough to justify tvs, but no. Gotta sit there in your infant seat and twiddle your thumbs.

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.

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.
6/15Sat
1 stopDelta
4h 38mSTL-YUL
$229
6/21Fri
3 stops
20h 50mSTL-YUL
$231
7/5Fri
1 stopAir Canada
6h 28mSTL-YUL
$266
7/18Thu
nonstopUnited Airlines
2h 23mSTL-YUL
$275
6/21Fri
2 stopsUnited Airlines
18h 20mSTL-YUL
$294
10/3Thu
nonstopAir Canada
2h 23mSTL-YUL
$299
10/3Thu
1 stopAmerican Airlines
14h 01mSTL-YUL
$307
6/14Fri
2 stopsAmerican Airlines
17h 28mSTL-YUL
$312
5/6Mon
1 stopWestJet
16h 26mSTL-YUL
$356
5/5Sun
1 stopWestJet
5h 53mSTL-YUL
$362

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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.
4/30Tue
multi-stopDelta
21h 06mSTL-YUL
5/4Sat
multi-stopDelta
12h 16mYUL-STL
$719
4/30Tue
multi-stopWestJet
5h 54mSTL-YUL
5/4Sat
multi-stopWestJet
6h 36mYUL-STL
$817
4/30Tue
multi-stopAir Canada
10h 20mSTL-YUL
5/4Sat
nonstopAir Canada
2h 35mYUL-STL
$825
4/30Tue
multi-stopAir Canada
7h 32mSTL-YUL
5/4Sat
nonstopAir Canada
2h 35mYUL-STL
$848
4/30Tue
multi-stopUnited Airlines
5h 27mSTL-YUL
5/7Tue
multi-stopUnited Airlines
5h 53mYUL-STL
$1,121
4/30Tue
multi-stopUnited Airlines
8h 51mSTL-YUL
5/7Tue
multi-stopUnited Airlines
5h 53mYUL-STL
$1,130
4/30Tue
multi-stopDelta
9h 08mSTL-YUL
5/7Tue
multi-stopDelta
12h 12mYUL-STL
$1,330

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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