N7991U

ALTERNATE AIR INC · BFI → S43

N7991U is operated by ALTERNATE AIR INC between Boeing Field King County International Airport (KBFI) and Harvey Field (S43). The flight is most often flown by a CESSNA Cessna 150. Typical block time is 0h 49m. SkyMeter has observed 84 legs of this flight number via ADS-B.

✈
FLIGHTS
84
last 90 days
⏱
AVG DURATION
49m
tracked time
📅
SERVICE PERIOD
06/01/2025 → 07/05/2026
first → last seen
🗺
ROUTES / TYPES
35 / 1
city pairs · airframes
⚠
INCIDENT RATE
17.9%
15 flagged

Routes flown

By count · last 90 days

10
KPAE → KBFI
3
avg 30m · Snohomish County (Paine Field) → Boeing Field King County
KBFI → S43
3
avg 35m · Boeing Field King County → Harvey Field
KBFI → KPAE
3
avg 50m · Boeing Field King County → Snohomish County (Paine Field)
KPWT → KBFI
3
avg 16m · Bremerton National → Boeing Field King County
W16 → KBFI
2
avg 23m · Firstair Field → Boeing Field King County
S43 → KBFI
2
avg 23m · Harvey Field → Boeing Field King County
KBFI → KS36
2
avg 24m · Boeing Field King County → Norman Grier Field
KTIW → KBFI
2
avg 34m · Tacoma Narrows → Boeing Field King County
KBFI → KPWT
2
avg 25m · Boeing Field King County → Bremerton National
KCLS → KPLU
1
avg 45m · Chehalis Centralia → Pierce County-Thun Field

Aircraft types

Equipment used on this number

1
C150 CESSNA Cessna 150
88

Safety profile

Flagged flights · last 90 days

Go-arounds
0
Unstable approach
15
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 N7991U

30
N7991UCESSNA Cessna 150
→
07/05/2026
57m
△ Unstable approach
Replay Analysis
N7991UCESSNA Cessna 150
→
07/05/2026
25m
△ Unstable approach
Replay Analysis
N7991UCESSNA Cessna 150
→
07/05/2026
20m
No alerts
Replay Analysis
N7991UCESSNA Cessna 150
→
07/04/2026
16m
No alerts
Replay Analysis
N7991UCESSNA Cessna 150
→
07/04/2026
42m
No alerts
Replay Analysis
N7991UCESSNA Cessna 150
→
07/04/2026
28m
No alerts
Replay Analysis
N7991UCESSNA Cessna 150
→
07/01/2026
1h 5m
No alerts
Replay Analysis
N7991UCESSNA Cessna 150
→
06/30/2026
34m
No alerts
Replay Analysis
N7991UCESSNA Cessna 150
→
06/30/2026
27m
No alerts
Replay Analysis
N7991UCESSNA Cessna 150
→
06/26/2026
1h 0m
⛨ TFR entry△ Unstable approach
Replay Analysis
N7991UCESSNA Cessna 150
→
06/25/2026
52m
No alerts
Replay Analysis
N7991UCESSNA Cessna 150
→
06/23/2026
55m
△ Unstable approach
Replay Analysis
N7991UCESSNA Cessna 150
→
06/23/2026
1h 2m
△ Unstable approach
Replay Analysis
N7991UCESSNA Cessna 150
→
06/22/2026
1h 27m
No alerts
Replay Analysis
N7991UCESSNA Cessna 150
→
06/21/2026
48m
No alerts
Replay Analysis
N7991UCESSNA Cessna 150
→
06/21/2026
1h 3m
No alerts
Replay Analysis
N7991UCESSNA Cessna 150
→
06/21/2026
2h 26m
No alerts
Replay Analysis
N7991UCESSNA Cessna 150
→
06/20/2026
1h 41m
△ Unstable approach
Replay Analysis
N7991UCESSNA Cessna 150
→
06/20/2026
55m
△ Unstable approach
Replay Analysis
N7991UCESSNA Cessna 150
→
06/19/2026
6m
No alerts
Replay Analysis
N7991UCESSNA Cessna 150
→
06/19/2026
43m
No alerts
Replay Analysis
N7991UCESSNA Cessna 150
→
06/19/2026
1h 14m
No alerts
Replay Analysis
N7991UCESSNA Cessna 150
→
06/17/2026
1h 32m
No alerts
Replay Analysis
N7991UCESSNA Cessna 150
→
06/15/2026
19m
No alerts
Replay Analysis
N7991UCESSNA Cessna 150
→
06/15/2026
20m
No alerts
Replay Analysis
N7991UCESSNA Cessna 150
→
06/14/2026
56m
No alerts
Replay Analysis
N7991UCESSNA Cessna 150
→
06/14/2026
47m
No alerts
Replay Analysis
N7991UCESSNA Cessna 150
→
06/14/2026
40m
No alerts
Replay Analysis
N7991UCESSNA Cessna 150
→
06/14/2026
1h 32m
No alerts
Replay Analysis
N7991UCESSNA Cessna 150
→
06/13/2026
20m
No alerts
Replay Analysis
© SkyMeter · All flight data subject to ODbL attribution · Tracked: 90-day window