KALN St Louis Regional Airport
St Louis Regional Airport (ALN) is a towered general-aviation airport in Alton/St Louis, Illinois, at 544 ft elevation, with 2 runways: 11/29 (8,099 ft), 17/35 (6,500 ft). Below: the current METAR and TAF decoded in plain English, runway wind components, frequencies, and the FAA terminal procedures for d-TPP 2611 (Oct 29, 2026 – Nov 26, 2026).
| Identifiers | ICAO KALN · FAA ALN · IATA ALN |
|---|---|
| Location | Alton/St Louis, IL · 38.8903, -90.0460 |
| Elevation | 544 ft MSL (166 m) |
| Tower | 126.0 MHz (REGIONAL TWR) |
| ATIS | 128.0 MHz |
| FAA charts | 16 in d-TPP 2611 (Oct 29, 2026 – Nov 26, 2026) |
KALN METAR and TAF
METAR KALN 010455Z AUTO 12005KT 10SM OVC110 17/12 A3026 RMK AO2 T01680115| Wind | From 120° at 5 kt |
|---|---|
| Visibility | 10 statute miles or more |
| Weather | None reported |
| Clouds | Overcast 11,000 ft · ceiling 11,000 ft |
| Temperature / dew point | 17°C (63°F) / 12°C (54°F) · spread 5°C |
| Altimeter | 30.26 inHg (1025 hPa) |
| Flight category | VFR — ceiling above 3,000 ft and visibility above 5 SM |
Remarks: AO2: automated station with a precipitation sensor · T01680115: temperature 16.8°C, dew point 11.5°C
Wind components by runway
From the METAR wind (120° true at 5 kt) and the runway true headings. Tower and ATIS winds are magnetic — use those for the actual runway choice.
- RWY 11: headwind 5 kt, crosswind 1 kt from the right
- RWY 29: tailwind 5 kt, crosswind 1 kt from the left
- RWY 17: headwind 3 kt, crosswind 4 kt from the left
- RWY 35: tailwind 3 kt, crosswind 4 kt from the right
KALN does not issue a TAF. Check the TAF of the nearest larger airport, or an area forecast in an official briefing.
Source: NOAA Aviation Weather Center (aviationweather.gov). Times are UTC (Z). Decoded for learning — get an official weather briefing before flight.
Runways
| Runway | Length × width | Surface | Lighted |
|---|---|---|---|
| 11 / 29 | 8,099 × 150 ft | asphalt | Yes |
| 17 / 35 | 6,500 × 100 ft | asphalt | Yes |
Frequencies
| Service | Name | MHz |
|---|---|---|
| Approach / departure | APP/DEP | 124.2 |
| ATIS | 128.0 | |
| AWOS | AWOS 3 | 128.0 |
| Clearance delivery | CLNC DEL | 120.2 |
| CTAF | 126.0 | |
| Ground | 120.2 | |
| Radio (FSS) | 122.05 | |
| Tower | REGIONAL TWR | 126.0 |
| UNICOM | 122.95 |
Runways and frequencies: OurAirports (public domain) — they can change. Check the FAA Chart Supplement for KALN before you fly.
FAA charts for KALN — d-TPP 2611
16 charts effective Oct 29, 2026 09:01Z until Nov 26, 2026 09:01Z. Each link opens the original FAA PDF (aeronav.faa.gov).
Airport diagram 1
Instrument approach procedures 5
Departure procedures (DP / ODP) 5
Arrivals (STAR) 2
Minimums, hot spots and notices 3
KALN on the FAA d-TPP search · Chart Supplement
KALN charts and weather, offline in the cockpit
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Nearby airports
- KSTL St. Louis Lambert International Airport 17 nm
- KCPS St Louis Downtown Airport 20 nm
- KSUS Spirit of St Louis Airport 32 nm
- KMDH Southern Illinois Airport 77 nm
- KJEF Jefferson City Memorial Airport 100 nm
- KCMI University of Illinois Willard Airport 107 nm
All 274 US airports · E6B flight computer · Weight & balance
Charts: FAA digital Terminal Procedures Publication (d-TPP), public domain — linked unmodified, not hosted here. Airport data: OurAirports (public domain). Weather: NOAA Aviation Weather Center.
For practice and reference only — not for navigation or flight planning. Always check current official sources (FAA charts, Chart Supplement, NOTAMs, an official weather briefing). The pilot in command is responsible for the flight.