DERBY21 is operated by between Spring Lake Airport (IN43) and Louisville Muhammad Ali International Airport (KSDF). The flight is most often flown by a LOCKHEED MARTIN C-130J Super Hercules ; Lockheed. Typical block time is 0h 33m. SkyMeter has observed 63 legs of this flight number via ADS-B.
✈
FLIGHTS
63
last 90 days
⏱
AVG DURATION
33m
tracked time
📅
SERVICE PERIOD
05/28/2025 → 07/16/2026
first → last seen
🗺
ROUTES / TYPES
39 / 1
city pairs · airframes
⚠
INCIDENT RATE
4.8%
3 flagged
Routes flown
By count · last 90 days
Aircraft types
Equipment used on this number
Safety profile
Flagged flights · last 90 days
Go-arounds
0
Unstable approach
3
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 DERBY21
07/16/2026
1h 48m
No alerts
07/16/2026
6m
No alerts
07/15/2026
1h 23m
No alerts
07/15/2026
33m
No alerts
07/08/2026
1h 15m
No alerts
07/07/2026
1h 36m
No alerts
07/07/2026
16m
No alerts
07/01/2026
6m
No alerts
07/01/2026
41m
No alerts
07/01/2026
5m
No alerts
06/30/2026
32m
△ Low approach-stability score
06/30/2026
18m
No alerts
06/23/2026
8m
No alerts
06/17/2026
18m
No alerts
06/17/2026
1h 24m
No alerts
06/17/2026
11m
No alerts
06/16/2026
13m
No alerts
06/16/2026
1h 10m
No alerts
06/16/2026
9m
No alerts
06/10/2026
6m
No alerts
06/10/2026
27m
No alerts
06/10/2026
9m
No alerts
06/03/2026
26m
No alerts
06/03/2026
18m
No alerts
06/03/2026
16m
No alerts
06/03/2026
10m
No alerts
06/02/2026
1h 49m
No alerts
06/02/2026
6m
No alerts
05/28/2026
54m
No alerts
05/28/2026
1h 30m
No alerts
© SkyMeter ·
All flight data subject to ODbL attribution
·
Tracked: 90-day window
