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STL - YUL

Find cheap flights from St. Louis to Montreal from $181

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 5/28. 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
Fri 6/7
Fri 6/14

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 43,968,530 times on KAYAK, and here is why:

Save 21% 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
10:34 am - 12:15 pmSTL-YUL
24h 41m3 stops
6:50 am - 2:23 pmYUL-STL
8h 33m1 stop
Tue, Jun 4 - Tue, Jun 11
10:34 am - 12:33 amSTL-YUL
12h 59m2 stops
6:50 am - 2:23 pmYUL-STL
8h 33m1 stop
Tue, Jun 4 - Tue, Jun 11
1:10 pm - 11:05 pmSTL-YUL
8h 55m1 stop
7:00 am - 6:11 pmYUL-STL
12h 11m1 stop
$447Delta
Find Deal
Wed, Jun 19 - Tue, Jun 25
6:05 am - 5:42 pmSTL-YUL
10h 37m1 stop
6:47 pm - 9:09 amYUL-STL
15h 22m1 stop
$449WestJet
Find Deal
Sat, Jun 29 - Mon, Jul 1
12:00 pm - 3:23 pmSTL-YUL
2h 23mnonstop
7:30 pm - 9:05 pmYUL-STL
2h 35mnonstop
$450Air Canada
Find Deal
Tue, Aug 6 - Sat, Aug 17
6:55 pm - 9:10 amSTL-YUL
13h 15m1 stop
6:47 pm - 11:43 pmYUL-STL
5h 56m1 stop
$460Delta
Find Deal
Wed, Jun 19 - Mon, Jun 24
9:50 am - 1:13 pmSTL-YUL
2h 23mnonstop
9:10 am - 3:21 pmYUL-STL
7h 11m1 stop
$461Air Canada
Find Deal
Tue, Jun 25 - Fri, Jun 28
7:37 am - 10:38 pmSTL-YUL
14h 01m1 stop
8:01 am - 11:20 pmYUL-STL
16h 19m1 stop
$472American Airlines
Find Deal
Thu, Sep 19 - Thu, Sep 26
3:27 pm - 10:44 pmSTL-YUL
6h 17m1 stop
5:23 pm - 8:36 amYUL-STL
16h 13m1 stop
$473American Airlines
Find Deal
Sat, Jun 15 - Mon, Jun 24
7:15 am - 5:42 pmSTL-YUL
9h 27m1 stop
7:05 am - 12:01 pmYUL-STL
5h 56m1 stop
$488WestJet
Find Deal
Wed, Jun 19 - Wed, Jun 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 Tuesday and avoid Thursdays if you are looking for the best rates. For your return to St. Louis, you’ll find the best rates on Wednesdays and the most expensive ones on Tuesdays.

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 $381 on average. On the other hand, the most expensive months are June and September, where the average cost of tickets is $830 and $687 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 1 day 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 ($447) and WestJet ($449). American Airlines proposed the cheapest one-way flight at $206.

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 $257.

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 9:50 am and will be landing in Montreal Pierre Elliott Trudeau Intl Airport at 1:13 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

January

High season

August

Cheapest flight

$181
Best time to beat the crowds with an average 33% 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 $181 for a one-way ticket and $350 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 WestJet?

    The two airlines most popular with KAYAK users for flights from St. Louis to Montreal are Delta and WestJet. With an average price for the route of $601 and an overall rating of 8.0, Delta is the most popular choice. WestJet is also a great choice for the route, with an average price of $645 and an overall rating of 7.5.

  • 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 $299 or less one-way and $942 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 5 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 10789 reviews
8.0Entertainment
7.9Comfort
8.2Boarding
8.6Crew
7.4Food
Airline reviews

West Jet has a horrible boarding process and the seats have no cushion.

4.0 OkayDouglas, May 2024MSP - YEG
Read more about Delta reviews

West Jet has a horrible boarding process and the seats have no cushion.

Everything went smoothly. I didn’t like that when I booked in the main cabin my wife and I weren’t seated together. One would think when booking on an option that allows picking your seat. They would put you and your travel partner together. Had to call to get it sorted. They did fix.

The gate area was incredibly short staffed, with one representative manning 4-5 flights, which caused a 3 hr delay in boarding even though the plane was all ready to leave. Other flights also were delayed because of this. The flight crew was awesome and I feel bad for the only gate worker on call, but Delta needs to hire more employees.

Very frustrated with boarding gate crew. She announced the plane was small and they would be limiting us to one item to carry on. Not a problem for me as I understand the tiny planes have limited space!! Not the case here! It was a rather large plane and had plenty of room for bags! So because I don’t want to be one of “those people” who ignores the request to check a carry on I did so asking if I would be able to pick it up at the bottom of the ramp on arrival in Knoxville to which she responded “yes”! Then I watched as every other passenger held onto their 2 items and boarded!! Then when we arrived in Knoxville our 2 carry ons had been put with all the other luggage and we had to go to baggage pick up and wait for all the big checked bags to come off the carousel! So she lied!! Frustrating. Next time I won’t be so nice!

It was a good experience except when boarding a female flight attendant did not go out of her way to assist my teenage daughters in finding space for their carry-ons after their compartments were full.

On time departure, smooth trip, flight attendant told through passengers the gate we would arrive at and the gate our outbound flight was departing from. Early arrival

Checking in at the airport the agent only booked the first keg of my trip and had my checked luggage going to the airport with a layover! Never was issued a boarding pass for the second leg or received sticker fir my checked bag. All was well in the end! Delta agents helped to resolve the situation!!!

Delayed due to an ill passenger after loading. Not preventable on Delta's part. Was in first class. The seats are becoming worn and detaching from their velcro attachments. Only got snacks on flight. The attendant was not the friendliest.

I would fly again the whole experience was great. The only feed back I can give that they don't do that American Airlines does is the crew there is more humorous with boarding and thank their passengers. It makes it more fun to fly with them. I would however fly Delta again.

Big plane, long flight, absolutely no leg room and basically non existent air! I am 5”4’ and always travel Main Cabin, I was miserable on this plane and could barely move when we arrived in Cabo due to the cramped leg area!

food worker strike caused lack of service. I know, not your fault but a bit of a inconvenience.

The staff on the WestJet flight were friendly and helpful. The flight was smooth and we arrived 30 minutes ahead of time.

The on time performance and the ease of boarding are great. The crew were cordial. During landing the pilot made a hard landing with some swerve that was a bit rough but other than that everything else is as smooth as it can be.

Horrible, flight on the way to Vegas was delayed significantly and then on my way back my second flight was cancelled

If they have a tv for movie or map during 5h flight could be better and the food can purchase on flight are ok with that.

We requested 2 wheel chairs upon arrival. On board an attendant told us to remain in our seats until everyone was off the plane. we were in row 11 and thought we would be off early. After all were off, a different attendant said we should leave, and that the chairs were gone. One was available for my friend who had just spent 9 days in hospital but I had to walk quite some distance. Eventually a cart arrived to take us the rest of the way. This was over an hour after our arrival. The staff at the terminal did their best to help us but if we had been allowed off with the other passengers, our ride home would have been an hour earlier.

Our flight experience was great! Flight staff was funny and offered great service. Made record flying time coming home from Vegas after having to wait for planes on the tarmac because of high winds

Seats can use more cushioning, it felt very hard. The snack option could be better

Over all good. I had some issues with trying to buy my seat. The Westjet system kept trying to charge my credit card, without getting the seat. In the end after 5 times being charged, I got my seat.

I did not have a meal or entertainment, but flight was comfortable, beverage service was quick, crew was very helpful and pleasant. And a very smooth flight overall.

Flight was delayed 2.5 hours - a big deal on an overnight when you plan to sleep.

I feel like they have upgraded the app since I last flew United and I found it to be super helpful. I had stopped flying United unless absolutely necessary and my experience on this trip indicates they have been working hard to improve their services.

Surprisingly easy! I was hesitant to try this, but the cost swayed me. I actually felt like I had less stress than all the taxiing and possible delays that occur with short regional flights where you spend less time in the air than getting to and from the plane..

This flight was delayed multiple times and eventually canceled around 2-3ish. Original take off time was around 10:30am. By 3, there were no other options out of Houston, so stuck in Houston for from 3pm - 11am the next day.

Should have video screens Plane audio was poor and without wired connection hard to understand crew. Should serve more than just cups of water and pretzels on six hour flight. Did not see crew rest of flight. Fix charging sockets to retain charging blocks.

I paid $380 for my one-way ticket from California to Minnesota. The fair did not include online check-in. I received instructions from their app to check in at a kiosk. At the kiosk, the boarding pass would not print until an actual person came to verify that I had a personal item and not a carry-on item, On the plane, the person next to me was drunk and allowed to continue to order alcohol. United is garbage I’d rather fly spirit.

The ride was good but no food ot entertainment hence, it was just over an hour 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.

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.

Left from gate 30 minutes before flight. Never been late to a flight ever. It says 15 minutes before explicitly on the ticket.

I like the boarding process, it was fast. The seat doesn’t have a TV for a long flight and food wasn’t served, just snacks.

Use planes with TVs on flights over 4 hours. The free entertainment was a cheap in between solution for a very long flight that you don't even bother providing meals or decent snacks.

Even though we left CMI late, we mostly made up the time.

Delayed almost 4 hours for a 45 minute flight with no explanation.

Again, multiple delays and I eventually just canceled and drove!

Great crew. Very comfortable business seats with nice bedding. Good food. We were delayed to let late passengers on the flight, but otherwise great experience.

Great crew. We were delayed so that late passengers could get on the flight. Love the bedding in business class. Good food. Great experience.

The CX617 from HK to BKK was delayed more than 1.5 hours.

Horrible - they lied to me about baggage & boarding, even though I specifically spoke to their agents the day before my flight about my issue. When I showed up they did not let me board and stranded me at my airport until I bought a new flight with money I did not have to spend.

This is not a Business Class equipped airplane and even the crew apologize before take over BUT BUT Air Canada charged full business class fare

All was good, except our baggage was lost for most of a day. We are thankful that it was found quickly and delivered to our hotel. Rouge was fine outside of that problem.

Easy boarding, roomy seats, plenty of good food, very helpful snd friendly staff. Very smooth flight! Only thing that could have been better was to have cranberry juice. Women like this as it helps avoid UTI’s and not as sweet as other juices.

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.

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.
5/28Tue
2 stops
12h 59mSTL-YUL
$181
5/27Mon
1 stopAmerican Airlines
14h 09mSTL-YUL
$206
7/5Fri
1 stopAir Canada
7h 34mSTL-YUL
$208
10/4Fri
1 stopAir Canada
14h 45mSTL-YUL
$232
5/27Mon
3 stops
22h 15mSTL-YUL
$236
5/27Mon
nonstopUnited Airlines
2h 23mSTL-YUL
$284
7/5Fri
2 stopsAmerican Airlines
9h 36mSTL-YUL
$289
5/13Mon
2 stops
27h 42mSTL-YUL
$301
5/13Mon
1 stopWestJet
23h 14mSTL-YUL
$382
5/13Mon
nonstopUnited Airlines
2h 23mSTL-YUL
$647

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St. Louis - Montreal Flights

Departure:

St. Louis (undefined)United States

Destination:

Montreal (YUL)Canada

Return flight deals:

Montreal - St. Louis

Cabin classes:

$966
$3,739
$1,827
$562