KALNOpen in the mapper

AIRPORT

St Louis Regional AirportKALN / ALN

St Louis Regional Airport serves Alton/St Louis, Illinois, United States. Its ICAO code is KALN and its IATA code ALN. The longest of its 2 runways is 11/29, at 8,099 ft (2,469 m). The field is 544 ft (166 m) above sea level. Local time is America/Chicago, UTC-6, or UTC-5 with daylight saving.

Published by Overfly · Airport data: OurAirports, 14 Sep 2026 · Last updated 23 Sep 2026

ICAO

KALN

IATA

ALN

LONGEST RUNWAY

8,099 ft

2,469 m · 11/29

ELEVATION

544 ft

166 m

TIME ZONE

UTC-6

America/Chicago

POSITION

38.890°N

90.046°W

Runways

11/298,099 ft · 2,469 mASP

17/356,500 ft · 1,981 mASP

Nearest airports

St. Louis Lambert International Airport KSTL 17 nm30m

Scott AFB/Midamerica Airport KBLV 23 nm35m

Spirit of St Louis Airport KSUS 32 nm35m

Abraham Lincoln Capital Airport KSPI 60 nm35m

Southern Illinois Airport KMDH 77 nm40m

Decatur Airport KDEC 79 nm40m

Quincy Regional Airport Baldwin Field KUIN 83 nm40m

Veterans Airport of Southern Illinois KMWA 84 nm40m

Questions people ask about St Louis Regional Airport

How long is the runway at St Louis Regional Airport?

The longest runway, 11/29, is 8,099 ft (2,469 m), surface ASP. St Louis Regional Airport has 2 runways in all.

What is the elevation of St Louis Regional Airport?

544 ft (166 m) above mean sea level.

What time zone is St Louis Regional Airport in?

America/Chicago: UTC-6, or UTC-5 with daylight saving.

What are the codes for St Louis Regional Airport?

ICAO KALN, IATA ALN. It serves Alton/St Louis, United States.

How far can you fly from Alton/St Louis?

Open the mapper with a 7,300 nm range ring around KALN, then pick your own aircraft, add a route and check every leg.

Open KALN in the mapper

For reference and planning interest. Not for operational flight planning. Runway and elevation data from OurAirports; check current charts and NOTAMs before any flight. © 2026 Overfly.Flights