Cheap flights from St. Louis to Montreal from $141
This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from St. Louis to Montreal departing on 9/18. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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American Airlines flights from St. Louis to Montreal Pierre Elliott Trudeau Intl Airport
Our best American Airlines deals on St. Louis to Montreal Pierre Elliott Trudeau Intl Airport flight tickets
Delta flights from St. Louis to Montreal Pierre Elliott Trudeau Intl Airport
Our best Delta deals on St. Louis to Montreal Pierre Elliott Trudeau Intl Airport flight tickets
See travel insights to Montreal from
How to get the cheapest flight ticket from St. Louis to Montreal Pierre Elliott Trudeau Intl Airport
Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip
What is the cheapest month to fly to Montreal Pierre Elliott Trudeau Intl Airport?
The month of October is another great option to travel to Montreal Pierre Elliott Trudeau Intl Airport, with average flight prices from St. Louis averaging around $304.
What is the cheapest day to depart on your flight to Montreal Pierre Elliott Trudeau Intl Airport?
The cheapest day to depart from St. Louis to Montreal Pierre Elliott Trudeau Intl Airport is on a Tuesday. Travelers who choose to depart for Montreal Pierre Elliott Trudeau Intl Airport on a Tuesday will often find tickets for as low as $1,063. Flights from St. Louis to Montreal Pierre Elliott Trudeau Intl Airport on a Saturday will generally be more expensive and average around $1,221. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.
What is the cheapest time of day to depart on your flight to Montreal Pierre Elliott Trudeau Intl Airport?
In the evening is the cheapest time of day to fly from St. Louis to Montreal Pierre Elliott Trudeau Intl Airport when you can find flight prices for as low as $282. Flying to Montreal Pierre Elliott Trudeau Intl Airport in the evening is an ideal time because this is during off-peak travel hours. Flights at noon are often more expensive with an average ticket price of $1,174.
What is the cheapest Lambert-St Louis to Montreal Pierre Elliott Trudeau Intl flight route?
Fly from Lambert-St Louis to Montreal Pierre Elliott Trudeau Intl for the best Lambert-St Louis - Montreal Pierre Elliott Trudeau Intl flight prices
What cabin class options are available on Lambert-St Louis to Montreal Pierre Elliott Trudeau Intl flights?
There are 4 cabin classes available to choose from on Lambert-St Louis to Montreal Pierre Elliott Trudeau Intl flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.
Can stopping save me money on St. Louis to Montreal Pierre Elliott Trudeau Intl Airport flights?
You could potentially save up to 37% on your flight if you consider stops on a St. Louis to Montreal Pierre Elliott Trudeau Intl Airport flight.
What is the cheapest airline that flies from Lambert-St Louis to Montreal Pierre Elliott Trudeau Intl?
American Airlines, Delta, and Air Canada are the most popular carriers operating from Lambert-St Louis to Montreal Pierre Elliott Trudeau Intl
What airlines fly to Montreal Pierre Elliott Trudeau Intl Airport?
Air Canada, Delta and United Airlines are the top three most popular airlines that fly to Montreal Pierre Elliott Trudeau Intl Airport from St. Louis according to our data. Air Canada is the first choice among our users, with 46% of people opting to fly with this airline when traveling to Montreal Pierre Elliott Trudeau Intl Airport. Keep in mind that there are 4 different airlines that fly to Montreal Pierre Elliott Trudeau Intl Airport on a routine basis, so you have a few additional options to choose from.
How many flights depart from St. Louis to Montreal Pierre Elliott Trudeau Intl Airport on average per day?
The number of flights available between St. Louis and Montreal Pierre Elliott Trudeau Intl Airport is 2 per day as of June 2025. The most frequent departure time is 1:00PM, with 100% of daily flights leaving in the afternoon.
How many flights depart from St. Louis to Montreal Pierre Elliott Trudeau Intl Airport on average per week?
As of June 2025, 14 flights take off from St. Louis and land in Montreal Pierre Elliott Trudeau Intl Airport each week. The most common flight departure day for this route is Mon, with 14% of weekly flights taking off on this day.
When to book flights from St. Louis to Montreal Pierre Elliott Trudeau Intl Airport
Cheap St. Louis to Montreal Pierre Elliott Trudeau Intl Airport (STL to YUL) flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from St. Louis to Montreal Pierre Elliott Trudeau Intl Airport
How far is Lambert-St Louis to Montreal Pierre Elliott Trudeau Intl by plane?
There are 963.7 mi between Lambert-St Louis and Montreal Pierre Elliott Trudeau Intl. A reasonable flight in good conditions will take 2h 30m.
When did momondo last update prices for flights from Lambert-St Louis Airport to Montreal Pierre Elliott Trudeau Intl Airport?
Prices for flights from Lambert-St Louis Airport to Montreal Pierre Elliott Trudeau Intl Airport are updated daily.
How many operators does momondo search for flights from Lambert-St Louis Airport to Montreal Pierre Elliott Trudeau Intl Airport?
As of June 2025, there are 4 operators available to choose from for flights from Lambert-St Louis Airport to Montreal Pierre Elliott Trudeau Intl Airport.
How old do you have to be to fly from Lambert-St Louis Airport to Montreal Pierre Elliott Trudeau Intl Airport?
The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Lambert-St Louis Airport to Montreal Pierre Elliott Trudeau Intl Airport.
What documentation or ID do you need to fly to Montreal Pierre Elliott Trudeau Intl Airport?
The required travel and health documents for your Montreal Pierre Elliott Trudeau Intl Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Montreal Pierre Elliott Trudeau Intl Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.
What is the most popular plane model from St. Louis to Montreal Pierre Elliott Trudeau Intl Airport?
Based on momondo bookings for flights between St. Louis and Montreal Pierre Elliott Trudeau Intl Airport, the leading plane model is Canadair (Bombardier) Regional Jet 900, making up 43.85% of the total bookings. Other popular models include Airbus A330-300 with 20.77%, Airbus A220-300 with 20.00%, and Boeing 787-8 Dreamliner with 3.08%.
What is the most popular airline from St. Louis to Montreal Pierre Elliott Trudeau Intl Airport?
Based on momondo bookings for flights between St. Louis and Montreal Pierre Elliott Trudeau Intl Airport, the leading airline is Air Canada, making up 46% of the total bookings. Other popular airlines include Delta with 21%, United Airlines with 21%, and American Airlines with 12%.
Best airlines flying from St. Louis to Montreal Pierre Elliott Trudeau Intl Airport
Compare and see reviews for airlines that fly from St. Louis to Montreal Pierre Elliott Trudeau Intl Airport with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom $246 | Free Cancellation | Rating 7.4 8,790 reviews | |||
| PriceFrom $255 | Free Cancellation | Rating 8.0 7,950 reviews | |||
| PriceFrom $259 | Free Cancellation | Rating 7.1 9,531 reviews | |||
| PriceFrom $330 | Free Cancellation | Rating 7.2 10,000 reviews |
United Airlines Flights From St. Louis to Montreal Pierre Elliott Trudeau Intl Airport
The lowest priced United Airlines flight from St. Louis to Montreal Pierre Elliott Trudeau Intl Airport from the last 72 hours was $246. Generally, United Airlines has 7 flights on this route every week with an average price of $646. United Airlines is rated 7.4/10 by our users.
Air Canada Flights From St. Louis to Montreal Pierre Elliott Trudeau Intl Airport
$259 is the best Air Canada flight deal from St. Louis to Montreal Pierre Elliott Trudeau Intl Airport found on momondo over the last 72 hours. The average Air Canada ticket price found was closer to $692, however, with flight time and availability significantly affecting the price. Air Canada (7.1/10 from 9,531 user reviews) flies into Montreal Pierre Elliott Trudeau Intl Airport from St. Louis 7 times in an average week so prices can vary.
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Why should I use momondo to find a flight deal from St. Louis to Montreal?
momondo collates all your flight options in one place and lets you filter them to find the perfect flight from St. Louis to Montreal. momondo saves you time and could save you money on your trip.
Can I find flights from St. Louis to Montreal with flexible booking policies on momondo?
All flight searches from St. Louis to Montreal on momondo can be filtered to show those which offer flexible booking policies.
How can momondo help me find flights from St. Louis to Montreal?
Once all potential St. Louis to Montreal flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.
I’m not ready to book a flight from St. Louis to Montreal right now. Can momondo alert me if prices change?
Yes momondo offers price alerts on flights to Montreal from St. Louis. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.