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Cheap Flights from St Louis (STL) to Montreal (YMQA)

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      1. Home
      2. United States
      3. St Louis
      4. Montreal

      Compare St Louis to Montreal flight deals

      Find the cheapest month or even day of the year to fly to Montreal

      Book the best Montreal fare with no extra fees

      Flight dealsCheapest monthFind the best routeRoute infoFAQsTips and advice

      Flight deals from St Louis to Montreal

      Looking for a cheap last-minute deal or the best return flight from St Louis to Montreal? Find the lowest prices on one-way and return tickets right here.
      Montreal.£350 per passenger.Departing Fri, 13 Jun, returning Sun, 15 Jun.Return flight with Frontier Airlines and Porter Airlines.Outbound indirect flight with Frontier Airlines, departs from St Louis on Fri, 13 Jun, arriving in Montreal Pierre Elliott Trudeau.Inbound indirect flight with Porter Airlines, departs from Montreal Pierre Elliott Trudeau on Sun, 15 Jun, arriving in St Louis.Price includes taxes and charges.From £350, select.
      Fri, 13 JunSTL - YUL with Frontier Airlines
      1 stop
      Sun, 15 JunYUL - STL with Porter Airlines
      1 stop
      from £350
      Montreal.£350 per passenger.Departing Mon, 7 Jul, returning Wed, 9 Jul.Return flight with Spirit Airlines and Porter Airlines.Outbound indirect flight with Spirit Airlines, departs from St Louis on Mon, 7 Jul, arriving in Montreal Pierre Elliott Trudeau.Inbound indirect flight with Porter Airlines, departs from Montreal Pierre Elliott Trudeau on Wed, 9 Jul, arriving in St Louis.Price includes taxes and charges.From £350, select.
      Mon, 7 JulSTL - YUL with Spirit Airlines
      1 stop
      Wed, 9 JulYUL - STL with Porter Airlines
      1 stop
      from £350
      Montreal.£397 per passenger.Departing Mon, 28 Jul, returning Fri, 1 Aug.Return flight with Spirit Airlines and Porter Airlines.Outbound indirect flight with Spirit Airlines, departs from St Louis on Mon, 28 Jul, arriving in Montreal Pierre Elliott Trudeau.Inbound indirect flight with Porter Airlines, departs from Montreal Pierre Elliott Trudeau on Fri, 1 Aug, arriving in St Louis.Price includes taxes and charges.From £397, select.
      Mon, 28 JulSTL - YUL with Spirit Airlines
      1 stop
      Fri, 1 AugYUL - STL with Porter Airlines
      1 stop
      from £397
      Montreal.£441 per passenger.Departing Tue, 26 Aug, returning Sun, 31 Aug.Return flight with Delta.Outbound indirect flight with Delta, departs from St Louis on Tue, 26 Aug, arriving in Montreal Pierre Elliott Trudeau.Inbound indirect flight with Delta, departs from Montreal Pierre Elliott Trudeau on Sun, 31 Aug, arriving in St Louis.Price includes taxes and charges.From £441, select.
      Tue, 26 AugSTL - YUL with Delta
      1 stop
      Sun, 31 AugYUL - STL with Delta
      1 stop
      from £441
      Montreal.£442 per passenger.Departing Fri, 27 Jun, returning Sat, 5 Jul.Return flight with Frontier Airlines and Air Transat.Outbound indirect flight with Frontier Airlines, departs from St Louis on Fri, 27 Jun, arriving in Montreal Pierre Elliott Trudeau.Inbound indirect flight with Air Transat, departs from Montreal Pierre Elliott Trudeau on Sat, 5 Jul, arriving in St Louis.Price includes taxes and charges.From £442, select.
      Fri, 27 JunSTL - YUL with Frontier Airlines
      1 stop
      Sat, 5 JulYUL - STL with Air Transat
      1 stop
      from £442
      Montreal.£445 per passenger.Departing Fri, 5 Sep, returning Sun, 7 Sep.Return flight with Delta.Outbound indirect flight with Delta, departs from St Louis on Fri, 5 Sep, arriving in Montreal Pierre Elliott Trudeau.Inbound indirect flight with Delta, departs from Montreal Pierre Elliott Trudeau on Sun, 7 Sep, arriving in St Louis.Price includes taxes and charges.From £445, select.
      Fri, 5 SepSTL - YUL with Delta
      1 stop
      Sun, 7 SepYUL - STL with Delta
      1 stop
      from £445
      Montreal.£463 per passenger.Departing Fri, 29 Aug, returning Tue, 2 Sep.Return flight with Delta.Outbound indirect flight with Delta, departs from St Louis on Fri, 29 Aug, arriving in Montreal Pierre Elliott Trudeau.Inbound indirect flight with Delta, departs from Montreal Pierre Elliott Trudeau on Tue, 2 Sep, arriving in St Louis.Price includes taxes and charges.From £463, select.
      Fri, 29 AugSTL - YUL with Delta
      1 stop
      Tue, 2 SepYUL - STL with Delta
      1 stop
      from £463
      Montreal.£537 per passenger.Departing Wed, 8 Oct, returning Mon, 13 Oct.Return flight with Delta.Outbound indirect flight with Delta, departs from St Louis on Wed, 8 Oct, arriving in Montreal Pierre Elliott Trudeau.Inbound indirect flight with Delta, departs from Montreal Pierre Elliott Trudeau on Mon, 13 Oct, arriving in St Louis.Price includes taxes and charges.From £537, select.
      Wed, 8 OctSTL - YUL with Delta
      1 stop
      Mon, 13 OctYUL - STL with Delta
      1 stop
      from £537
      How did we find these deals? The deals you see here are the lowest prices for flight tickets from St Louis to Montreal found in the last 4 days, and are subject to change and availability.

      Find the cheapest month to fly from St Louis to Montreal

      We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like St Louis to Montreal flights are currently cheapest in June.
      May
      from £769
      Jun
      from £350
      Jul
      from £350
      Aug
      from £441
      Sep
      from £445
      Oct
      from £537
      Nov
      Find prices
      Dec
      Find prices
      Jan
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      Feb
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      Mar
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      Apr
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      Direct flights from St Louis to Montreal

      Alternative St Louis to Montreal routes

      Looking for the cheapest, fastest or easiest route from St Louis to Montreal? You could fly into the following airports instead.

      St Louis to Montreal: Flight information

      The things to know before you go.
      Cheapest flight found£350
      Cheapest month to flyJuly
      Average flight time2 hrs, 30 mins
      Most popular airlineAir Canada
      Average flights per week21

      Finding cheap flights from St Louis to Montreal: Frequently asked questions

      There are 3 airports in Montreal: Montreal St Hubert, Montreal Pierre Elliott Trudeau and Montreal Mirabel.
      The best price we found for a return flight from St Louis to Montreal is £350. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.
      2 hours and 30 minutes is the average flight time from St Louis to Montreal.
      Air Canada, United and PAL Airlines fly direct from St Louis to Montreal.
      As of May 2025, there are 21 flights per week flying from St Louis to Montreal.
      The cheapest month to fly from St Louis to Montreal is usually May 2025.
      If you're flying from St Louis Airport, the cheapest airport near Montreal is Montreal Pierre Elliott Trudeau – which is 10.0 miles away from the centre of Montreal. We've found flights into this airport from £350.
      After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from St Louis Airport to Montreal on Monday, 7 July 2025.
      Yes – the average flight time is 2 hours and 30 minutes.
      We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to Montreal but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.
      We crunched all the numbers in our flight calendar and it looks like the cheapest time to book a flight to Montreal is around 40 days in advance, so don’t leave your flight to the last minute.
      In May, the average temperature is usually around 12°C. July is typically the warmest month in Montreal, when it usually averages around 25°C. You can expect the least rain in February. The coldest month is January, with temperatures averaging -17°C. The rainiest month is June.
      Currently, Spirit Airlines and Air Canada offer the cheapest flight tickets to Montreal.

      Travelling from Lambert-St. Louis International Airport (STL) to Montreal: what you need to know

      • Approximately 2 hours 50 minutes is how long you can expect to be travelling on a direct flight from Lambert-St. Louis International Airport to Montreal.

      • Montreal is one hour ahead of St Louis, where Lambert-St. Louis International Airport is located. Montreal observes the UTC-4 timezone.

      • With three flights a week between the two airports, Lambert-St. Louis International Airport (STL) to Montreal-Pierre Elliott Trudeau International Airport (YUL) is the most popular route. Air Canada operates the earliest flight at 13:30. If you'd like to make the most of your day before flying, the latest departure from STL to YUL is with Air Canada at 13:30.

      • To avoid missing your STL to Montreal flight, leave enough time to check in and find your gate. Turning up two hours before international departures and one hour before domestic flights is the general rule.

      • If you're heading away during a bank holiday or another peak period, allow extra time. A good general rule is two hours before domestic flights and up to four hours before international departures. Check-in and security lines will be longer.

      • Start your journey at STL and travel straight to Montreal-Pierre Elliott Trudeau International Airport (YUL). That's where you can expect to touch down when searching for Lambert-St. Louis International Airport to Montreal tickets.

      • Check out the deals with Air Canada. This airline has direct flights from Lambert-St. Louis International Airport to Montreal.

      • We make it easy to book plane tickets from STL to Montreal with a stopover. To see all your options, uncheck 'Direct flights only.' Next, select a flight that has a stop long enough to tour your chosen city. Major stopovers include:

        • O'Hare International Airport (ORD)

        • Pearson International Airport (YYZ)

        • LaGuardia Airport (LGA)

      • STL is around 10 miles from central St Louis. If you're driving, catching a cab or ride-sharing from the centre, it'll take you 20 minutes or so to get there, depending on traffic conditions. If you're using public transport, expect the travel time to be around 35 minutes.

      • Looking for a hotel near STL? If you're boarding an early flight from Lambert-St. Louis International Airport to Montreal, these stays set you up for a seamless send-off:

        • La Quinta Inn by Wyndham St. Louis Hazelwood - Airport North

        • Extended Stay America Select Suites - St Louis - Airport - Central

        • Best Western St. Louis Airport North Hotel Suites

      • When it comes to the on-time performance of Lambert-St. Louis International Airport, 78.04% of flights meet their scheduled arrival time.

      • You'll find STL at 10701 Lambert International Blvd..

      How to find the cheapest flights from Lambert-St. Louis International Airport (STL) to Montreal

      • The lowest price we've found for a one-way Lambert-St. Louis International Airport to Montreal flight is £138. The cheapest price for a return flight is £350. Remember fares can change due to demand at the time of booking.

      • To snag cheap flights from STL to Montreal, reserve your trip one month ahead of your planned departure.

      • Schedule your trip for May. That's the best month for scoring a bargain on Lambert-St. Louis International Airport to Montreal tickets. If you're flexible on when you fly, use the 'Whole month' tool to access the lowest price across every month.

      • Stay on top of deals for cheap flights from STL to Montreal by creating a Price Alert. You'll get an email or notification on the app when a lower fare pops up.

      • Tailor your flights with filters. Pick your preferred arrival and departure times, total journey duration and airlines. You can also sort results by 'Fastest,' 'Best' or 'Cheapest' flights from Lambert-St. Louis International Airport to Montreal.

      Airports in Montreal

      Montreal-Pierre Elliott Trudeau International Airport (YUL)

      • Montreal-Pierre Elliott Trudeau International Airport (YUL) is around 16 miles from central Montreal. If you're getting a cab or a ride-share, the drive will take roughly 25 minutes.

      • If you're travelling by public transport, expect a journey time of about 45 minutes.

      • The last thing you need is a lengthy journey to your hotel if you're landing late on a flight from Lambert-St. Louis International Airport to Montreal. Book one of these accommodation options near YUL instead:

        • Novotel Montréal Aéroport

        • DoubleTree by Hilton Montreal Airport

        • Days Inn by Wyndham Montreal Airport Conference Centre

      • Travel at your own speed with a Montreal-Pierre Elliott Trudeau International Airport rental car. Pick up a set of wheels from Avis, Alamo or Routes Car Rentals and venture far and wide through Montreal and beyond.

      • Booking your vehicle from Montreal-Pierre Elliott Trudeau International Airport around four weeks in advance of your flight from STL to Montreal can help you lock in the lowest rate.

      • YUL is located at 975 Romeo Vachon Street North.

      St. Hubert Airport (YHU)

      • St. Hubert Airport (YHU) is around 25 miles from the centre of Montreal. Once you've disembarked your flight from Lambert-St. Louis International Airport to Montreal, it'll take you around 35 minutes to reach the heart of the city in a ride-share or cab.

      • Public transport will get you there in around 1 hour 45 minutes.

      • After stepping off your STL to Montreal flight, tuck yourself in at a hotel close to YHU. These are some great accommodation options that'll help you sink into relaxation mode:

        • Motel R-100

        • Grand Motel Saint-Hubert

        • Well Equipped Studio FOR NON-SMOKING Guests Only Citq ЗO9467

      • Why wait around for a cab? A St. Hubert Airport rental car lets you start your journey right away. Put on your favourite playlist and hit the highway with a set of wheels from Enterprise or Budget.

      • Typically, the sooner you book, the better the prices and selection of vehicles. Lock in your ride from YHU as soon as you know your dates.

      Best time to go to Montreal

      • Before locking in your flights from Lambert-St. Louis International Airport to Montreal, consider which time of year is best for you. Peak season in Montreal offers a lively atmosphere and plenty to do, while low season means you'll get cheaper deals on hotels and fewer crowds.

      • The warmest month in Montreal is July, with temperatures ranging between 14ºC (57ºF) and 28ºC (82ºF). Lock in your Lambert-St. Louis International Airport to Montreal plane ticket then if that's the weather you find most pleasant.

      • If you like travelling in cooler conditions, look for a cheap ticket from STL to Montreal in January when temperatures average between -19ºC (-2ºF) and -2ºC (28ºF).

      More about Montreal

      • After booking your flight from Lambert-St. Louis International Airport to Montreal, choose a hotel that combines comfort with a great location. Make one of these accommodation options your base for exploring Montreal:

        • Hotel Newstar Montréal

        • Hotel Montreal Metropolitan, BW Signature Collection

        • Motel Newstar Laval

      • Every great journey has to include some sightseeing. Montreal Botanical Garden, Mount Royal Park and Saint Joseph's Oratory of Mount Royal are must-visits when exploring Montreal.

      Explore more of Canada

      • Toronto is just one of the many places in Canada waiting to be explored after you've experienced Montreal. Around 310 miles away to the south-west, its best attractions include CN Tower, Royal Ontario Museum and Go Tours Canada - Distillery District.

      • Ottawa is another well-known destination in Canada and is around 95 miles west of Montreal. No journey is complete without experiencing Parliament Hill, Rideau Canal and National Gallery of Canada.

      Plan the rest of your trip from St Louis to Montreal

      • Car hire in Montreal
      • Hotels in Montreal

      Prices shown on this page are estimated lowest prices only. Found in the last 45 days.

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