Great Lakes Seaplane Base Seaplane BasePrivate
41IL · Antioch, IL · Non-towered
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Weather
METAR observed
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TAF forecast
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Sun & FAA night2026-08-07 · night begins 08:36 PM
| Event | Local (CDT) | UTC |
|---|---|---|
| Morning civil twilight Loggable night ends | 05:19 AM | 10:19Z |
| Sunrise | 05:51 AM | 10:51Z |
| Sunset | 08:05 PM | 01:05Z |
| Evening civil twilight Loggable night begins | 08:36 PM | 01:36Z |
Plan a flight from 41IL
Winds aloft NOAA forecast · 3,000 to 53,000 ft
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Full reports: nearest reporting station
Advisories
Airspace hazards
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Runways
Headings shown are true (magnetic variation unavailable).
| Runway | Length | Your margin |
|---|---|---|
| 3W/21W | 3,451 ft |
Prefer one flat page? Full runway details for 41IL → · New to pattern entries? The 45° entry, explained → · Teaching here? Print the 41IL kneeboard →
Comms & NavAids
Nearby navigation aids
OBK 113.00 · DPA 114.55 · BAE 116.40
| NavAid | Type | Freq · ch | Range | Radial / Dist magnetic |
|---|---|---|---|---|
| OBK · Northbrook | VOR/DME | 113.00 · 77X | High | r333° / 16.8 NM |
| DPA · Dupage | VOR/DME | 114.55 · 92Y | Low | r014° / 35.9 NM |
| BAE · Badger | VOR/DME | 116.40 · 111X | High | r168° / 39.6 NM |
Charts & procedures
No published instrument procedures or Chart Supplement for 41IL — open it on the VFR sectional →
Airport info
Airport information
- FAA LID
- 41IL
- Coordinates
- 42.4665, -88.1328
- Elevation
- 737 ft MSL
- Sectional chart
- CHICAGO
- Airport use
- Private
- Control tower
- No
- ARTCC
- CHICAGO (ZAU)
- Flight service (FSS)
- KANKAKEE · 122.2 · 1-800-WX-BRIEF
- Segmented circle
- No
- Activated
- 2022/04
- Distance from city
- 2 WSW
Ownership & management 2 contacts
Remarks FAA · 1 notes
Contact
- FLOAT172@GMAIL.COM
Nearby airports
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Also nearby: 50IL Midland Airport (private) (2 NM) · 3LL4 Pillow Hill Airport (private) (3 NM) · 49C Camp Lake Airport (4 NM) · IL11 Donald Alfred Gade Airport (private) (4 NM) · 3LL5 Richardson Field (4 NM) · WI58 Winfield Airport (private) (6 NM)
About 41IL
Great Lakes Seaplane Base (41IL) is a seaplane base in Antioch, IL, at 737 ft MSL. It has 1 runway, the longest 3,451 ft, with no control tower (pilot-controlled). This page shows live METAR/TAF weather, runway crosswinds, frequencies, navaids, and FAA charts for 41IL, refreshed from the Aviation Weather Center and FAA NASR.
Does 41IL have a control tower?
No. Great Lakes Seaplane Base is a non-towered (pilot-controlled) seaplane base; use the published CTAF/UNICOM in the Comms & NavAids section.
What is the longest runway at 41IL?
Great Lakes Seaplane Base has 1 runway; the longest is 3,451 ft. See the Runways section for headings, surface, and lighting.
Where is 41IL?
Great Lakes Seaplane Base is in Antioch, IL, at an elevation of 737 ft MSL. Coordinates: 42.4665, -88.1328.
Fly out of 41IL often?
Save 41IL 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 41IL 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.