N4181B is operated by OSTERBERG DOUGLAS L, OSTERBERG LAURIE A between Appleton International Airport (KATW) and Clintonville Municipal Airport (KCLI). The flight is most often flown by a BELLANCA Bellanca Viking. Typical block time is 0h 31m. SkyMeter has observed 25 legs of this flight number via ADS-B.

✈
FLIGHTS
25
last 90 days
⏱
AVG DURATION
31m
tracked time
📅
SERVICE PERIOD
06/04/2025 → 08/03/2026
first → last seen
🗺
ROUTES / TYPES
21 / 1
city pairs · airframes
⚠
INCIDENT RATE
20.0%
5 flagged

Routes flown

By count · last 90 days

10
KATW → KCLI
2
avg 19m · Appleton → Clintonville
KATW → KSBM
1
avg 36m · Appleton → Sheboygan County
KPCZ → KATW
1
avg 15m · Waupaca → Appleton
79C → KATW
1
avg 5m · Brennand → Appleton
WI22 → KATW
1
avg 3m · Rocket City → Appleton
KCLI → KATW
1
avg 11m · Clintonville → Appleton
3IA0 → KATW
1
avg 1h 43m · Washington County Hospital Heliport → Appleton
5WI7 → KATW
1
avg 24m · Thedacare Medical Center Waupaca Heliport → Appleton
WI52 → KATW
1
avg 12m · Schewe → Appleton
KSBM → KATW
1
avg 37m · Sheboygan County → Appleton

Aircraft types

Equipment used on this number

1
BL17 BELLANCA Bellanca Viking
25

Safety profile

Flagged flights · last 90 days

Go-arounds
0
Unstable approach
5
Rejected TO
0
Stall warnings
0
Overspeeds
0
Runway excursion
0
Counts represent flights with at least one occurrence of each flag, not the total event count. See /incidents for individual events.

Recent flights

Newest 30 operations of N4181B

30
N4181BBELLANCA Bellanca Viking
→
08/03/2026
2m
No alerts
Replay Analysis
N4181BBELLANCA Bellanca Viking
→
08/03/2026
11m
No alerts
Replay Analysis
N4181BBELLANCA Bellanca Viking
→
08/03/2026
17m
No alerts
Replay Analysis
N4181BBELLANCA Bellanca Viking
→
08/03/2026
1h 10m
No alerts
Replay Analysis
N4181BBELLANCA Bellanca Viking
→
08/03/2026
46m
No alerts
Replay Analysis
N4181BBELLANCA Bellanca Viking
→
08/02/2026
26m
No alerts
Replay Analysis
N4181BBELLANCA Bellanca Viking
→
08/02/2026
37m
No alerts
Replay Analysis
N4181BBELLANCA Bellanca Viking
→
08/02/2026
1h 27m
No alerts
Replay Analysis
N4181BBELLANCA Bellanca Viking
→
07/15/2026
1h 43m
No alerts
Replay Analysis
N4181BBELLANCA Bellanca Viking
→
07/15/2026
1h 32m
No alerts
Replay Analysis
N4181BBELLANCA Bellanca Viking
→
07/14/2026
11m
No alerts
Replay Analysis
N4181BBELLANCA Bellanca Viking
→
07/14/2026
11m
No alerts
Replay Analysis
N4181BBELLANCA Bellanca Viking
→
07/12/2026
11m
△ Low approach-stability score
Replay Analysis
N4181BBELLANCA Bellanca Viking
→
07/12/2026
12m
No alerts
Replay Analysis
N4181BBELLANCA Bellanca Viking
→
07/05/2026
30m
△ Low approach-stability score
Replay Analysis
N4181BBELLANCA Bellanca Viking
→
07/05/2026
30m
No alerts
Replay Analysis
N4181BBELLANCA Bellanca Viking
→
06/26/2026
37m
△ Low approach-stability score
Replay Analysis
N4181BBELLANCA Bellanca Viking
→
06/26/2026
36m
No alerts
Replay Analysis
N4181BBELLANCA Bellanca Viking
→
06/17/2026
11m
△ Low approach-stability score
Replay Analysis
N4181BBELLANCA Bellanca Viking
→
06/17/2026
25m
No alerts
Replay Analysis
N4181BBELLANCA Bellanca Viking
→
06/15/2026
15m
No alerts
Replay Analysis
N4181BBELLANCA Bellanca Viking
→
06/15/2026
5m
No alerts
Replay Analysis
N4181BBELLANCA Bellanca Viking
→
06/07/2026
24m
No alerts
Replay Analysis
N4181BBELLANCA Bellanca Viking
→
06/07/2026
14m
No alerts
Replay Analysis
N4181BBELLANCA Bellanca Viking
→
06/02/2026
5m
△ Low approach-stability score
Replay Analysis
N4181BBELLANCA Bellanca Viking
→
01/15/2026
9m
No alerts
Replay Analysis
N4181BBELLANCA Bellanca Viking
→
08/23/2025
10m
No alerts
Replay Analysis
N4181BBELLANCA Bellanca Viking
→
08/23/2025
1h 2m
No alerts
Replay Analysis
N4181BBELLANCA Bellanca Viking
→
08/14/2025
8m
No alerts
Replay Analysis
N4181BBELLANCA Bellanca Viking
→
08/14/2025
14m
No alerts
Replay Analysis
© SkyMeter · All flight data subject to ODbL attribution · Tracked: 90-day window