John L Coppernoll Airport
4LL3 · Stockton, IL · Print kneeboard
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Weather
METAR observed
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TAF forecast
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Sun & FAA night2026-08-03 · night begins 08:49 PM
| Event | Local (CDT) | UTC |
|---|---|---|
| Morning civil twilight Loggable night ends | 05:23 AM | 10:23Z |
| Sunrise | 05:54 AM | 10:54Z |
| Sunset | 08:17 PM | 01:17Z |
| Evening civil twilight Loggable night begins | 08:49 PM | 01:49Z |
Plan a flight from 4LL3
Winds aloft NOAA forecast · 3,000 to 53,000 ft
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Advisories
NOTAMs
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Pilot reports
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Airspace hazards
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Runways
RWY NLEFT traffic
- Heading
- 000° true
- Dimensions
- 2,000 × 100 ft
- TPA
- 1,900 ft MSL (≈1,000 AGL) · standard
- Surface
- TURF
Enter the left downwind (heading 180°) on the 45° at 1,900 ft MSL (≈1,000 AGL).
Pattern side: FAA NASR · TPA standard 1,000 ft AGL (not charted) · layout: schematic (headings + lengths)
Headings shown are true (magnetic variation unavailable).
| Runway | Length | Your margin |
|---|---|---|
| N/S | 2,000 ft |
Prefer one flat page? Full runway details for 4LL3 → · New to pattern entries? The 45° entry, explained → · Teaching here? Print the 4LL3 kneeboard →
Comms & NavAids
Nearby navigation aids
DBQ 115.80
| NavAid | Type | Freq · ch | Range | Radial / Dist magnetic |
|---|---|---|---|---|
| DBQ · Dubuque | VORTAC | 115.80 · 105X | High | r096° / 32.7 NM |
Charts & procedures
No published instrument procedures or Chart Supplement for 4LL3 — open it on the VFR sectional →
Airport info
Airport information
- FAA LID
- 4LL3
- Coordinates
- 42.3083, -89.9835
- Elevation
- 930 ft MSL
Detailed FAA facility data isn't available for this airport.
No published services or facility detail for 4LL3.
Nearby airports
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Also nearby: IS37 Stockton Airport (1 NM) · 99IL Providence Place Field (private) (2 NM) · 84IL Bud Pierce Memorial Airport (private) (3 NM) · 96IL Gerbick Airport (private) (7 NM) · 88LL Block Airport (private) (10 NM) · 6IL4 Foxfield Aerodrome (private) (10 NM)
About 4LL3
John L Coppernoll Airport (4LL3) is an airport in Stockton, IL, at 930 ft MSL. It has 1 runway, the longest 2,000 ft. This page shows live METAR/TAF weather, runway crosswinds, frequencies, navaids, and FAA charts for 4LL3, refreshed from the Aviation Weather Center and FAA NASR.
What is the longest runway at 4LL3?
John L Coppernoll Airport has 1 runway; the longest is 2,000 ft. See the Runways section for headings, surface, and lighting.
Where is 4LL3?
John L Coppernoll Airport is in Stockton, IL, at an elevation of 930 ft MSL. Coordinates: 42.3083, -89.9835.
Fly out of 4LL3 often?
Save 4LL3 as your home base in the SkyReady app for a one-tap Go/No-Go readiness brief, weather alerts, and automatic FAA currency — free to log.
Weather is live from the Aviation Weather Center; airport facility data is from the FAA NASR (28-day cycle). For planning and education only; always verify against official sources. Open 4LL3 in a full tool: METAR/TAF decoder, crosswind calculator, sun & night times, or the density altitude calculator. Planning from here? Find the nearest airport with fuel or an approach, or check whether an IFR alternate is required.