Cheap Flights from St Louis to Montreal Pierre Elliott Trudeau

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

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Flight deals from St Louis Airport to Montreal Pierre Elliott Trudeau Airport

Looking for a cheap last-minute deal or the best return flight from St Louis Airport to Montreal Pierre Elliott Trudeau Airport? If you want to travel next month, return fares start from Rs148,670. Find the lowest prices on one-way and return tickets right here.

Find the cheapest month to fly from St Louis to Montreal Pierre Elliott Trudeau

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like St Louis to Montreal Pierre Elliott Trudeau flights are currently cheapest in April.

Direct flights from St Louis to Montreal Pierre Elliott Trudeau

St Louis to Montreal Pierre Elliott Trudeau: Alternative routes

Compare routes from St Louis to Montreal below. You may find an airport to fly into that's cheaper, faster, or easier than Montreal Pierre Elliott Trudeau.

St Louis to Montreal: Flight information

The things to know before you go.
Cheapest flight foundRs56,528
Cheapest month to flyApril
Average flight time2 hrs, 33 mins
Most popular airlineAir Canada
Average flights per week21

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

The best price we found for a return flight from St Louis to Montreal Pierre Elliott Trudeau is Rs116,399. 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 33 minutes is the average flight time from St Louis to Montreal Pierre Elliott Trudeau.
Air Canada, United and Jazz Air fly direct from St Louis to Montreal Pierre Elliott Trudeau.
As of March 2026, there are 21 flights per week flying from St Louis to Montreal Pierre Elliott Trudeau.
The cheapest month to fly from St Louis to Montreal Pierre Elliott Trudeau is usually April.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from St Louis Airport to Montreal Pierre Elliott Trudeau Airport on Monday, 27 April 2026.
Yes – the average flight time is 2 hours and 33 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 Pierre Elliott Trudeau 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.
Currently, Frontier Airlines and Air Canada offer the cheapest flight tickets to Montreal Pierre Elliott Trudeau.

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

  • The average time for a direct flight from Lambert-St. Louis International Airport to Montreal-Pierre Elliott Trudeau International Airport is 2 hours 25 minutes.

  • Montreal is one hour ahead of St Louis and follows the UTC-4 timezone.

  • Choose from six weekly Lambert-St. Louis International Airport to Montreal-Pierre Elliott Trudeau International Airport flights. The 09:50 departure with Air Canada is the earliest flight available. Air Canada operates the latest service of the day at 12:00.

  • To ensure you get on your STL to YUL flight, leave plenty of time to check in and drop off your luggage. Arriving two hours before international departures and an hour before domestic flights is the general rule.

  • Travelling during a peak time such as July? Major public holidays and other popular periods can lead to longer lines at airport checkpoints. Play things extra safe and get there up to four hours ahead of international flights and two hours before domestic departures.

  • Air Canada is your ticket to exploring Montreal (and perhaps some other great parts of Canada!). Check out the direct flights from Lambert-St. Louis International Airport to Montreal-Pierre Elliott Trudeau International Airport offered by this airline.

  • Air Canada is the airline with the highest passenger demand for this route.

  • Consider adding a stopover when booking your ticket from Lambert-St. Louis International Airport to Montreal-Pierre Elliott Trudeau International Airport. Simply deselect 'Direct flights only' to break up your journey, or visit a new city along the way. Here's where you can stop between STL and YUL:

    • Pearson International Airport

    • O'Hare International Airport

    • Detroit Metropolitan Wayne County Airport

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

  • Right now, Rs56,528 is the cheapest price we've found for a one-way Lambert-St. Louis International Airport to Montreal-Pierre Elliott Trudeau International Airport flight. The best price for a return plane ticket is Rs116,399. Bear in mind that fares can change due to availability when booking.

  • To get cheap tickets from STL to YUL, reserve your journey six months before your departure.

  • The cheapest month for flights from Lambert-St. Louis International Airport to Montreal-Pierre Elliott Trudeau International Airport is May. Use the 'Whole month' tool to find the lowest prices if you have flexible dates.

  • Getting your hands on cheap flights from STL to YUL couldn't be easier with Price Alerts. Simply create one of these automatic alerts and we'll notify you as soon as fares go down.

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

Handy information about Lambert-St. Louis International Airport (STL)

  • STL is located at 10701 Lambert International Blvd..

  • Of the flights that depart from Lambert-St. Louis International Airport, 78.04% land on schedule at their destination.

  • To reach Lambert-St. Louis International Airport from central St Louis, it'll take around 20 minutes if you're going by car. Of course, this depends on traffic. It's approximately 26 kilometres from the airport to the city centre.

  • The trip when using public transport will take about 35 minutes.

  • Get your travels off to a leisurely start by staying near STL. Whether you've booked an early flight from Lambert-St. Louis International Airport to Montreal-Pierre Elliott Trudeau International Airport or just don't want to be rushed, these stays are the answer:

Arriving at Montreal-Pierre Elliott Trudeau International Airport (YUL)

Getting from Montreal-Pierre Elliott Trudeau International Airport (YUL) to central Montreal

  • YUL is located at 975 Romeo Vachon Street North.

  • Montreal-Pierre Elliott Trudeau International Airport to central Montreal has a drive time of about 25 minutes. It's approximately 26 kilometres away.

  • When travelling on public transport, expect a journey time of around 2 hours 15 minutes.

When to fly to Montreal-Pierre Elliott Trudeau International Airport (YUL)

  • It's time to plan your dates for your flight from Lambert-St. Louis International Airport to Montreal-Pierre Elliott Trudeau International Airport. August is the busiest month to head to Montreal. If you'd like a more relaxed vibe, go in February.

  • The warmest month in Montreal is July, with the temperature ranging between 14ºC and 28ºC. Book your flights from Lambert-St. Louis International Airport to Montreal-Pierre Elliott Trudeau International Airport in this month if you enjoy this type of weather.

  • Search for cheap tickets from STL to YUL in January if you'd rather travel during cooler conditions. Temperatures are at their lowest then, ranging between -19ºC and -2ºC on average.

Explore more of Canada

  • Toronto is just one of the many cities in Canada waiting to be discovered after you've seen Montreal. Around 499 kilometres away to the south-west, top sights here include CN Tower, Royal Ontario Museum and Go Tours Canada - Distillery District.

  • Around 153 kilometres west of Montreal, Ottawa is another essential stop in Canada. Start your sightseeing at Parliament Hill, Rideau Canal and National Gallery of Canada.

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