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Cheap flights from St Louis to Montreal

Nonstop flights run on a seasonal schedule, the next one is on 4 March. Operated by 2 airlines, about 4h 4m in the air, 974 mi (1,568 km). Tickets from $483.

Flights from St Louis to Montreal

Pick a departure date to see flights and seller prices

We search agencies and airlines for your day: nonstop and connecting flights, baggage, departure and arrival times.

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Best fares from St Louis to Montreal

Lowest one-way prices found by recent searches for the next 120 days; press a card to search that date

Cheapest one-way $483 14 November 2026, with a connection Cheapest in the next 7 days $483 14 November, Sat Cheapest weekend departure $483 Sat, 14 November 2026 Cheapest month November 2026 tickets from $483

St Louis to Montreal at a glance

flight time, from 2h 28m to 5h 40m
4h 4m
straight-line distance
974 mi (1,568 km)
next flight
4 March
first and last departure
06:30 - 13:25
lowest price, with a connection, 14 November
$483
airlines
2

St Louis to Montreal flight schedule

2 seasonal or one-off. Departure and arrival times are local.

Seasonal and one-off flights

Not operating in the next two weeks. The first of them is on 4 March.

FlightDepartsArrivesDurationDaysAircraft
UA 3621
United Airlines
06:30 Lambert-St. Louis International, terminal 1
13:10 Montreal-Pierre Elliott Trudeau International
5h 40m
Seasonal
Embraer 175
AC 8688
Air Canada
13:25 Lambert-St. Louis International, terminal 1
16:53 Montreal-Pierre Elliott Trudeau International
2h 28m
Seasonal
Canadair Regional Jet 900

Days of the week are taken from the schedule for the next 14 days; schedules change by season. Montreal is 1 hour ahead of St Louis. The search shows seat availability and the price for your date.

Airlines flying St Louis to Montreal

Flights a week by schedule and the cheapest nonstop fare of each airline found by recent searches

Air Canadafrom 1 May United Airlinesfrom 4 March
  • Air Canada: 1 flight, departs at 13:25 MTWTFSS
  • United Airlines: 1 flight, departs at 06:30 MTWTFSS

Airports

Where flights from St Louis to Montreal depart and land

Departure from St Louis

Lambert-St. Louis International STL

Terminal 1, 12 mi (19 km) from the city centre

About the airport

Arrival in Montreal

Montreal-Pierre Elliott Trudeau International YUL

10 mi (16 km) from the city centre

About the airport

Frequently asked questions

How long is the flight from St Louis to Montreal?
A nonstop flight takes 4 hours 4 minutes on average, from 2h 28m to 5h 40m depending on the flight.
How far is Montreal from St Louis?
974 mi (1,568 km) in a straight line between the cities.
Which airlines fly nonstop from St Louis to Montreal?
Air Canada and United Airlines.
When are the first and last flights from St Louis to Montreal?
The first departure is at 06:30 (UA3621), the last at 13:25 (AC8688). Local time.
What is the cheapest upcoming date to fly from St Louis to Montreal?
14 November 2026 (Saturday): from $483 one way, with a connection, by recent searches. The search shows the price for your dates.
What is the time difference between St Louis and Montreal?
Montreal is 1 hour ahead of St Louis. Schedule times on this page are local to each airport.
Which St Louis airport do flights to Montreal leave from?
Lambert-St. Louis International.