AirportLookupSim Database

Reference only — not for real-world navigation.

KALN

St Louis Regional Airport · Alton/St Louis

Key Facts

Essential technical summary for MSFS 2020/2024 and X-Plane.

ILS Approach StatusILS FREQUENCIES VERIFIED ✅

Field Elevation

544 ft / 166 m

Transition Altitude

18,000 ft

Primary Channel

TWR 126.00 MHz (REGIONAL TWR)

Live Conversion

inHg

hPa

Details Runways Frequencies Navaids Nearby

Runway Summary (Quick-Links)

11/29 · 8,101 ft · AsphaltLIGHTED 17/35 · 6,500 ft · AsphaltLIGHTED

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Welcome to the technical flight briefing for St Louis Regional Airport (KALN), located in Alton/St Louis, United States. 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 544 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.

Airport Details

Full geographical and organizational metadata.

Full Name

St Louis Regional Airport

ICAO / IATA

KALN / ALN

Municipality

Alton/St Louis

Country

US — United States

Region

US-IL — Illinois

GPS Coordinates

📍 38.890301, -90.045998 🗺️

Transition Altitude

18,000 ft

Elevation

544 ft

Wikipedia

Pilot Toolbox

External charts, live tracking and weather reports.

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Runways & ILS Approach Data

Detailed dimensions and instrument landing frequencies.

Runway 11 / 29

ILS EQUIPPEDLIGHTED

Runway Length: 8,101 ft / 2,469 m
Runway Width: 150 ft / 46 m
Surface Type: Asphalt
Heading: 113.3° / 293.3°

RWY 11 (113.3°)

No ILS / Visual Only

RWY 29 (293.3°)

108.50 MHz

IDENT: ALN | CRS: 294°

Runway 17 / 35

LIGHTED

Runway Length: 6,500 ft / 1,981 m
Runway Width: 100 ft / 30 m
Surface Type: Asphalt
Heading: 173.3° / 353.3°

RWY 17 (173.3°)

No ILS / Visual Only

RWY 35 (353.3°)

No ILS / Visual Only

Nearby Navaids

Ground-based navigation aids (VOR, NDB, DME) in the vicinity or associated with this airport.

LM · NDB (Oblio)338 kHz

38.800301, -90.474701 · 0 ft

ST · NDB (Zumay)404 kHz

38.788101, -90.278900 · 0 ft

CSX · VOR-DME (Cardinal)116,450 kHz

38.752701, -90.360901 · 530 ft

STL · VORTAC (St Louis)117,400 kHz

38.860699, -90.482399 · 450 ft

CVM · NDB (Civic Mem)263 kHz

38.892300, -90.056297 · 545 ft

AL · NDB (Alpos)218 kHz

38.855099, -89.938202 · 0 ft

TOY · VORTAC (Troy)116,000 kHz

38.739201, -89.918602 · 570 ft

Communication Frequencies

Air traffic control and advisory channels.

A/D APP/DEP

124.20 MHz

ATIS ATIS

128.00 MHz

AWOS AWOS 3

128.00 MHz

CLD CLNC DEL

120.20 MHz

CTAF CTAF

126.00 MHz

GND GND

120.20 MHz

RDO RDO

122.05 MHz

TWR REGIONAL TWR

126.00 MHz

UNIC UNICOM

122.95 MHz

Nearby Airports

Alternative airports in the vicinity (km & nm).

St. Louis Lambert International Airport

Scott AFB/Midamerica Airport

Spirit of St Louis Airport

Abraham Lincoln Capital Airport

Southern Illinois Airport

Base Airport Data: OurAirports (Public Domain)
Instrument Approach Data: FAA NASR · Cycle: Jan 2026