Reference only — not for real-world navigation.
CST3
Montreal / St-Lazare Airport · Montréal
Key Facts
Essential technical summary for MSFS 2020/2024 and X-Plane.
ILS Approach StatusILS DATA NOT IN DATABASE
Field Elevation
175 ft / 53 m
Transition Altitude
18,000 ft
Primary Channel
UNICOM 123.50 MHz (St-Lazare UNICOM)
Live Conversion
inHg
hPa
Flight Planning
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Welcome to the technical flight briefing for Montreal / St-Lazare Airport (CST3), located in Montréal, Canada. As a vital hub for Microsoft Flight Simulator 2024, MSFS 2020, and X-Plane pilots, this facility features 2 active runways with a maximum elevation of 175 ft. Please note that this field primarily supports VFR and visual approach procedures.Reference the data below for primary communication channels and detailed runway characteristics. Pilots should observe a Transition Altitude of 18,000 ft verified for this field for altimeter reset procedures.
Full Name
Montreal / St-Lazare Airport
ICAO / IATA
CST3 / —
Municipality
Montréal
Country
Region
CA-QC — Quebec
GPS Coordinates
Transition Altitude
18,000 ft
Elevation
175 ft
Wikipedia
Pilot Toolbox
External charts, live tracking and weather reports.
Runway 02 / 20
UNLIT
Runway Length: 2,825 ft / 861 m
Runway Width: 50 ft / 15 m
Surface Type: ASPHALT
Heading: —° / —°
Runway Width: 50 ft / 15 m
Surface Type: ASPHALT
Heading: —° / —°
RWY 02
No ILS / Visual Only
RWY 20
No ILS / Visual Only
Runway 08 / 26
UNLIT
Runway Length: 2,275 ft / 693 m
Runway Width: 65 ft / 20 m
Surface Type: GRASS
Heading: —° / —°
Runway Width: 65 ft / 20 m
Surface Type: GRASS
Heading: —° / —°
RWY 08
No ILS / Visual Only
RWY 26
No ILS / Visual Only
ATF St-Lazare traffic
123.50 MHz
UNICOM St-Lazare UNICOM
123.50 MHz
Base Airport Data: OurAirports (Public Domain)
Instrument Approach Data: AIP 2026 Researched · Cycle: Jan 2026