Direct flights from Montreal to St Louis

Did you mean Flights from St Louis to Montreal?

Montreal

Canada

YUL

Montreal / Pierre Elliott Trudeau International Airport

St Louis

United States

STL

Lambert St Louis International Airport

Route: Nonstop service available
Distance: 968 miles
Marketing airlines: 2 airlines
Aircraft: 2 aircraft types
Dates: Oct 19, 2026 – Oct 14, 2027

Observed award fares

A sample of one-way prices for one traveler from Roame’s fare cache. Points, fees, and seats describe the same observation. Availability can change; confirm with the loyalty program before transferring points.

Departure window: 2026-10-23 – 2026-11-21.

No recent fares appear in this limited preview. This does not mean the route is sold out. Use the search controls to check other dates and routes.

Montreal to St Louis route overview

Montreal / Pierre Elliott Trudeau International Airport (YUL) serves Montreal; Lambert St Louis International Airport (STL) serves St Louis.

The airports are 968 miles apart by great-circle distance.

Roame's current schedule feed shows nonstop service from YUL to STL.

Marketing airlines listed in the current schedule, including codeshare sellers, are Air Canada (AC) and United Airlines (UA). This list does not identify the operating airline for each flight; check the flight details before booking.

Published schedule dates span Oct 19, 2026 – Oct 14, 2027.

Marketing airlines on the Montreal to St Louis route

These are marketing airlines, including codeshare sellers. This list does not identify the operating airline for each flight; check the flight details before booking.

United Airlines (UA)Codeshare only

Airline alliance affiliations represented: Star Alliance

Aircraft flying from YUL to STL

Frequently asked questions

Which airports serve the Montreal to St Louis route?

Montreal / Pierre Elliott Trudeau International Airport (YUL) is the origin airport and Lambert St Louis International Airport (STL) is the destination airport.

How far is St Louis from Montreal?

YUL and STL are approximately 968 miles apart by great-circle distance.

Are there direct flights from YUL to STL?

Yes. Roame's current schedule feed shows nonstop service from YUL to STL.

Which airlines market flights from YUL to STL?

Which aircraft fly from YUL to STL?

Aircraft listed in the current schedule include Canadair Regional Jet 900 (CR9) and Embraer 175 (short wing) (E75).