Cheap Flights from Montreal Pierre Elliott Trudeau to St Louis

Compare Montreal Pierre Elliott Trudeau to St Louis flight deals

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Flight deals from Montreal Pierre Elliott Trudeau to St Louis

Looking for a cheap last-minute deal or the best return flight from Montreal Pierre Elliott Trudeau to St Louis? Find the lowest prices on one-way and return tickets right here.

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

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

Direct flights from Montreal Pierre Elliott Trudeau to St Louis

Montreal Pierre Elliott Trudeau to St Louis: Alternative routes

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

Montreal to St Louis: Flight information

The things to know before you go.
Cheapest flight foundRs53,268
Cheapest month to flyJanuary
Average flight time2 hrs, 49 mins
Most popular airlineAir Canada
Average flights per week20

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

The best price we found for a return flight from Montreal Pierre Elliott Trudeau to St Louis is Rs81,827. 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 49 minutes is the average flight time from Montreal Pierre Elliott Trudeau to St Louis.
Air Canada, United and Jazz Air fly direct from Montreal Pierre Elliott Trudeau to St Louis.
As of December 2025, there are 20 flights per week flying from Montreal Pierre Elliott Trudeau to St Louis.
The cheapest month to fly from Montreal Pierre Elliott Trudeau to St Louis is usually February.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Montreal Pierre Elliott Trudeau Airport to St Louis Airport on Tuesday, 3 February 2026.
Yes – the average flight time is 2 hours and 49 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 St Louis 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 St Louis is around 40 days in advance, so don’t leave your flight to the last minute.
Currently, Porter Airlines and Air Canada offer the cheapest flight tickets to St Louis.

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

  • The average time for a direct flight from Montreal-Pierre Elliott Trudeau International Airport to Lambert-St. Louis International Airport is 2 hours 35 minutes.

  • The timezone in St Louis is UTC-5, which is one hour behind Montreal.

  • Flights from YUL to STL start from 19:30 — the earliest with Air Canada. The latest departure is at 19:30 with Air Canada. In total, there are six weekly Montreal-Pierre Elliott Trudeau International Airport to Lambert-St. Louis International Airport flights.

  • Arriving two hours before an international flight and one hour ahead of a domestic departure are travel rules worth sticking to. Be at the airport on time to catch your YUL to STL flight.

  • Flying during a peak time like August? Major public holidays and other popular periods can mean longer lines and delays at check-in and security. Play it safe and get there up to four hours ahead of an international flight and two hours before a domestic departure.

  • Air Canada offers direct flights from Montreal-Pierre Elliott Trudeau International Airport to Lambert-St. Louis International Airport. Book with this popular airline, then get ready to check out the sights in St Louis — and maybe even more of United States if your schedule allows.

  • The airline most travellers fly with on this route is Air Canada.

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

  • At the moment, Rs53,268 is the lowest price we've seen for a one-way Montreal-Pierre Elliott Trudeau International Airport to Lambert-St. Louis International Airport flight. The best price for a return ticket is Rs81,827. Keep in mind that fares may change due to demand when booking.

  • Book six months before travelling. After looking at the numbers on our calendar, this is how far you should book ahead to secure cheap tickets from YUL to STL.

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

  • Getting your hands on cheap flights from YUL to STL is a cinch with Price Alerts. Simply create one of these automatic alerts and we'll notify you when a lower fare pops up.

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

Handy information about Montreal-Pierre Elliott Trudeau International Airport (YUL)

  • YUL is located at 975 Romeo Vachon Street North.

  • 64.89% of flights that depart Montreal-Pierre Elliott Trudeau International Airport make it to their destination on time.

  • Central Montreal to Montreal-Pierre Elliott Trudeau International Airport is approximately 26 kilometres. Depending on traffic, it'll take about 25 minutes to get there if you're ride-sharing, catching a cab or driving.

  • Catching public transport? Expect a trip time of around 2 hours 15 minutes.

  • Taking an early flight from Montreal-Pierre Elliott Trudeau International Airport to Lambert-St. Louis International Airport? Avoid the hassle of rushing to the airport (and catch some extra z's) by choosing one of these stays near YUL:

Arriving at Lambert-St. Louis International Airport (STL)

Getting from Lambert-St. Louis International Airport (STL) to central St Louis

  • STL is located at 10701 Lambert International Blvd..

  • Lambert-St. Louis International Airport is roughly 26 kilometres from central St Louis. The drive time takes around 20 minutes.

  • It'll take around 35 minutes if you're travelling by public transport.

When to fly to Lambert-St. Louis International Airport (STL)

  • The quietest month for a flight from Montreal-Pierre Elliott Trudeau International Airport to Lambert-St. Louis International Airport is April, while July is the most popular. Pick the ideal time to go to St Louis based on whether you prefer a more fast-paced or easygoing experience.

  • The warmest month in St Louis is July, with the temperature ranging between 17ºC and 33ºC. Book your flights from Montreal-Pierre Elliott Trudeau International Airport to Lambert-St. Louis International Airport in this month if this is the kind of weather you like.

  • January has average temperatures of between -8ºC and 7ºC. Look for cheap tickets from YUL to STL around that time if you like travelling in cooler conditions.

Explore more of United States

  • You've seen St Louis, now it's time to explore other parts of United States. Travel around 418 kilometres north-east to Chicago to check off its top sights. From Millennium Park to Art Institute of Chicago and LandShark Beer Garden at Navy Pier, your itinerary will be busy.

  • Indianapolis is another must-experience destination in United States and is around 370 kilometres east of St Louis. No trip is complete without dropping by The Children's Museum of Indianapolis, Indianapolis Museum of Art and Indianapolis Zoo.

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