Airport information
- FAA LID
- 4LL3
- Coordinates
- 42.3083, -89.9835
- Elevation
- 930 ft MSL
Detailed FAA facility data isn't available for this airport.
Weather
METAR observed
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TAF forecast
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Sun & FAA night 2026-06-21
| Event | Local (CDT) | UTC |
|---|---|---|
| Morning civil twilight Loggable night ends | 04:48 AM | 09:48Z |
| Sunrise | 05:23 AM | 10:23Z |
| Sunset | 08:40 PM | 01:40Z |
| Evening civil twilight Loggable night begins | 09:15 PM | 02:15Z |
Plan a flight from 4LL3
Traffic pattern
- Landing
- Rwy N
- Pattern
- left (turns left)
- TPA
- 1,900 ft MSL (≈1,000 AGL)
Enter the left downwind for Rwy N at 1,900 ft MSL (≈1,000 AGL) on a 45°. TPA estimated at 1,000 ft AGL (not charted for this field).
Runway N/S
2,000 ft × 100 ft · TURF- Heading
- n/a
- Heading
- n/a
Headings shown are true (magnetic variation unavailable).
| Runway | Length | Your margin |
|---|---|---|
| N/S | 2,000 ft |
Nearby navigation aids
| NavAid | Type | Freq | Radial / Dist magnetic |
|---|---|---|---|
| PLL · Polo | VOR-DME | 111.20 | r312° / 29 NM |
| DBQ · Dubuque | VORTAC | 115.80 | r096° / 32.7 NM |
| RFD · Rockford | VOR-DME | 110.80 | r277° / 35.2 NM |
VFR sectional
No published instrument procedures or Chart Supplement for 4LL3. VFR sectional link above.
No published services or facility detail for 4LL3.
Nearby airports
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.
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 tab 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.