Cheap flights from Montreal to St. Louis from C$ 290
This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Montreal to St. Louis departing on 29/7. 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 Montreal to St. Louis
Our best American Airlines deals on Montreal to St. Louis flight tickets
Delta flights from Montreal to St. Louis
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How to get the cheapest flight ticket from Montreal to St. Louis
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 typical price of a round-trip flight between Montreal and St. Louis?
What is the cheapest month to fly to St. Louis?
The month of July is, on average, the cheapest month to fly to St. Louis from Montreal, with most prices found around C$ 595. If you don’t want to visit St. Louis in July, then you should wait until August to fly from Montreal, when ticket prices are also cheap, with an average price of C$ 608.
What is the cheapest day to depart on your flight to St. Louis?
Our data shows that Friday is the least expensive day to fly to St. Louis. Tickets to fly out on this day can be as low as C$ 612. The most expensive day to fly to St. Louis is Monday, with ticket prices averaging around C$ 1,039.
What is the cheapest time of day to depart on your flight to St. Louis?
The cheapest time of day to fly to St. Louis is in the morning when flights can be purchased for as low as C$ 693. If you have a flexible travel schedule, then try to avoid flying in the evening when prices are C$ 799 on average. Flights to St. Louis from Montreal in the evening are generally more expensive because this time of day is more convenient for travellers’ schedules.
What is the cheapest Montreal to Lambert-St Louis flight route?
Fly from Montreal Pierre Elliott Trudeau Intl to Lambert-St Louis for the best Montreal - Lambert-St Louis flight prices
What cabin class options are available on Montreal to Lambert-St Louis flights?
There are 1 cabin classes available to choose from on Montreal to Lambert-St Louis 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 Montreal to St. Louis flights?
You could potentially save up to 11% on your flight if you consider stops on a Montreal to St. Louis flight.
What is the cheapest airline that flies from Montreal to Lambert-St Louis?
American Airlines, Delta, and Air Canada are the most popular carriers operating from Montreal to Lambert-St Louis
Which airlines fly to St. Louis?
Air Canada, WestJet and United Airlines are the top three most popular airlines that fly to St. Louis from Montreal according to our data. Air Canada is the first choice among our users, with 57% of people opting to fly with this airline when travelling to St. Louis. Keep in mind that there are 3 different airlines that fly to St. Louis on a routine basis, so you have a few additional options to choose from.
How many flights depart from Montreal to St. Louis on average per day?
1 flights are operational daily from Montreal to St. Louis as of June 2025. The most popular departure time for this route is 6:00p.m., with 100% of flights per day taking off in the evening.
How many flights depart from Montreal to St. Louis on average per week?
As of June 2025, there are 8 flights per week flying from Montreal to St. Louis. The most common day of the week flights depart is Mon, with 25% of flights taking off on this day.
When to book flights from Montreal to St. Louis
Cheap Montreal to St. Louis (YMQ to STL) flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from Montreal to St. Louis
Best price found | C$ 290 |
|---|---|
Fastest flight time | 2h 47m |
Direct flights | Mon, Tue, Wed, Fri, Sat and Sun |
Airports in St. Louis | 1 airport |
How far is Montreal to Lambert-St Louis by plane?
The straight-line distance from Montreal to Lambert-St Louis is 1566.0 km. Flights usually cover this in 2h 47m, depending on flying conditions and air traffic around both airports.
When did momondo last update prices for flights from Montreal to Lambert-St Louis Airport?
Prices for flights from Montreal to Lambert-St Louis Airport are updated daily.
How many operators does momondo search for flights from Montreal to Lambert-St Louis Airport?
There are 3 operators available for flights from Montreal to Lambert-St Louis Airport as of June 2025.
How old do you have to be to fly from Montreal to Lambert-St Louis Airport?
Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Montreal to Lambert-St Louis Airport.
What documentation or ID do you need to fly to Lambert-St Louis Airport?
The travel and health documents you'll need for your trip to Lambert-St Louis Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Lambert-St Louis Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.
What is the most popular plane model from Montreal to St. Louis?
Based on momondo bookings for this flight route, the most popular plane model on flight routes from Montreal to St. Louis is Canadair (Bombardier) Regional Jet 900 (60.00% of total bookings). The next most popular plane model is Airbus A220-300 (40.00%).
What is the most popular airline from Montreal to St. Louis?
Based on momondo bookings for flights between Montreal and St. Louis, the leading airline is Air Canada, making up 100% of the total bookings.
Best airlines flying from Montreal to St. Louis
Compare and see reviews for airlines that fly from Montreal to St. Louis with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom C$ 536 | Free Cancellation | Rating 7.1 9,537 reviews | |||
| PriceFrom C$ 586 | Free Cancellation | Rating 7.4 8,790 reviews | |||
| PriceFrom C$ 733 | Free Cancellation | Rating 7.2 2,868 reviews |
United Airlines Flights From Montreal to St. Louis
Across 4 United Airlines flights from Montreal to St. Louis this week, the average price was C$ 540, with the best United Airlines deals starting from C$ 429 round-trip. 8,790 users have rated United Airlines on momondo, with an average score of 7.4/10.
Air Canada Flights From Montreal to St. Louis
Another popular option for Montreal to St. Louis flights is Air Canada (7.1/10, 9,537 ratings). Air Canada flies from Montreal to St. Louis around 4 times per week, with deals starting from C$ 392 round-trip and rising to an average price of around C$ 536.
Travelling to a place near St. Louis?
Book flights to St. Louis if you plan to visit one of these locationsWhy use momondo?
Why should I use momondo to find a flight deal from Montreal to St. Louis?
It is quick and easy to find Montreal to St. Louis flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to St. Louis that suits you.
Can I find flights from Montreal to St. Louis with flexible booking policies on momondo?
Yes. All flights to St. Louis from Montreal on momondo can be compared and filtered by various policies on offer, including flexible booking.
How can momondo help me find flights from Montreal to St. Louis?
Once all potential Montreal to St. Louis 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 Montreal to St. Louis right now. Can momondo alert me if prices change?
If you are simply researching potential flights to St. Louis, momondo offers a useful price alert feature which will track prices for flights to St. Louis from Montreal and alert you when they change.