Bancroft East Airport Private

4WI1 · Rio, WI · 840 ft elevation · var 0E · Non-towered

Overview Weather Runways Comms & NavAids Charts Services & info

Airport information

FAA LID: 4WI1
Coordinates: 43.4833, -89.1834
Elevation: 840 ft MSL
Magnetic variation: 0E
Sectional chart: CHICAGO
Airport use: Private
Control tower: No
ARTCC: CHICAGO (ZAU)
Flight service (FSS): GREEN BAY
Attendance: UNATNDD
Segmented circle: No
Wind indicator: yes
Activated: 1989/07
Distance from city: 1 E

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	04:40 AM	09:40Z
Sunrise	05:16 AM	10:16Z
Sunset	08:41 PM	01:41Z
Evening civil twilight Loggable night begins	09:17 PM	02:17Z

Loggable night (§1.1)

09:17 PM → 04:40 AM

Night currency (§61.57)

09:41 PM → 04:16 AM

Plan a flight from 4WI1

Destination (ICAO)

TAS (kt)Burn (gph)Reserve (hr)Wind from (°)Wind (kt)

Traffic pattern

Landing runway

LEFT traffic

Landing: Rwy 06
Pattern: left (turns left)
TPA: 1,800 ft MSL (≈1,000 AGL)

Enter the left downwind for Rwy 06 at 1,800 ft MSL (≈1,000 AGL) on a 45°. TPA estimated at 1,000 ft AGL (not charted for this field).

Runway 06/24

2,600 ft × 70 ft · Turf

Heading: n/a
Traffic pattern: Left
Approach obstacle: Pline, 625 ft from threshold

Heading: n/a
Traffic pattern: Left

Will it fit? Your aircraft's required runway length (from the POH) — checked against every runway here

ft · ≥1.5× comfortable, under 1.25× tight · saved across airports

Runway	Length	Your margin
06/24	2,600 ft

Nearby navigation aids

NavAid	Type	Freq	Radial / Dist magnetic
MSN · Madison	VORTAC	108.60	r016° / 21.4 NM
DLL · Dells	VORTAC	117.00	r096° / 25.6 NM

VFR sectional

Open 4WI1 on the VFR sectional (SkyVector) ↗

No published instrument procedures or Chart Supplement for 4WI1. VFR sectional link above.

Ownership & management

Owner

DAVID BANCROFT

W3798 OLD B RD., RIO, WI

(920) 319-2009

Manager

M. JAMES BANCROFT

W3758 OLD B RD., RIO, WI

920-348-5738

Remarks FAA

FILED FOR RECORD PURPOSES ONLY.
FOR CD CTC CHICAGO ARTCC AT 630-906-8921.

Nearby airports

7WI2 · Higgins AirportPrivate (2 NM)94C · Gilbert Field (4 NM)WS15 · Mill House FieldPrivate (4 NM)WN39 · Knutson FieldPrivate (6 NM)7WI6 · Weatherbee FieldPrivate (8 NM)6WN6 · Fountain Prairie AirportPrivate (10 NM)

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 4WI1 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 4WI1

Bancroft East Airport (4WI1) is an airport in Rio, WI, at 840 ft MSL. It has 1 runway, the longest 2,600 ft, with no control tower (pilot-controlled). This page shows live METAR/TAF weather, runway crosswinds, frequencies, navaids, and FAA charts for 4WI1, refreshed from the Aviation Weather Center and FAA NASR.

Does 4WI1 have a control tower?

No. Bancroft East Airport is a non-towered (pilot-controlled) airport; use the published CTAF/UNICOM on the Comms & NavAids tab.

What is the longest runway at 4WI1?

Bancroft East Airport has 1 runway; the longest is 2,600 ft. See the Runways tab for headings, surface, and lighting.

Where is 4WI1?

Bancroft East Airport is in Rio, WI, at an elevation of 840 ft MSL. Coordinates: 43.4833, -89.1834.

Fly out of 4WI1 often?

Save 4WI1 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.

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