Reference only — not for real-world navigation.
MRLB
Guanacaste Airport · Liberia
Key Facts
Essential technical summary for MSFS 2020/2024 and X-Plane.
ILS Approach StatusILS FREQUENCIES VERIFIED ✅
Field Elevation
270 ft / 82 m
Transition Altitude
18,000 ft
Primary Channel
TWR 118.80 MHz (LIBERIA TWR)
Live Conversion
inHg
hPa
Runway Summary (Quick-Links)
07/25 · 9,022 ft · AsphaltLIGHTEDFlight Planning
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Welcome to the technical flight briefing for Guanacaste Airport (MRLB), located in Liberia, Costa Rica. As a vital hub for Microsoft Flight Simulator 2024, MSFS 2020, and X-Plane pilots, this facility features 1 active runway with a maximum elevation of 270 ft. Instrument approaches (IFR) are supported with verified ILS frequencies and identifiers for precision landings.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
Guanacaste Airport
ICAO / IATA
MRLB / LIR
Municipality
Liberia
Country
Region
CR-G — Guanacaste Province
GPS Coordinates
Transition Altitude
18,000 ft
Elevation
270 ft
Wikipedia
Pilot Toolbox
External charts, live tracking and weather reports.
Runway 07 / 25
ILS EQUIPPEDLIGHTED
Runway Length: 9,022 ft / 2,750 m
Runway Width: 148 ft / 45 m
Surface Type: Asphalt
Heading: 70° / 250°
Runway Width: 148 ft / 45 m
Surface Type: Asphalt
Heading: 70° / 250°
RWY 07 (70°)
108.90 MHz
IDENT: I-LIR | CRS: 74°
RWY 25 (250°)
No ILS / Visual Only
APP LIBERIA APP
119.80 MHz
GND GND
121.70 MHz
RDO COCO RDO
126.80 MHz
TWR LIBERIA TWR
118.80 MHz
Base Airport Data: OurAirports (Public Domain)
Instrument Approach Data: AIP 2026 Researched · Cycle: Jan 2026