OST21 is operated by OKLAHOMA STATE UNIVERSITY between Hilltop Airport (88OK) and Stillwater Regional Airport (KSWO). The flight is most often flown by a PIPER Piper Seminole. Typical block time is 0h 46m. SkyMeter has observed 107 legs of this flight number via ADS-B.

✈
FLIGHTS
107
last 90 days
⏱
AVG DURATION
46m
tracked time
📅
SERVICE PERIOD
05/28/2025 → 08/26/2026
first → last seen
🗺
ROUTES / TYPES
19 / 1
city pairs · airframes
⚠
INCIDENT RATE
1.9%
2 flagged

Routes flown

By count · last 90 days

10
88OK → KSWO
5
avg 14m · Hilltop → Stillwater
KRVS → KSWO
3
avg 30m · Richard Lloyd Jones Jr → Stillwater
KSWO → KRVS
2
avg 51m · Stillwater → Richard Lloyd Jones Jr
KSWO → KF22
2
avg 33m · Stillwater → Perry
OK38 → KSWO
2
avg 19m · Stillwater Medical-Perry Heliport → Stillwater
KSWO → KSLN
1
avg 2h 1m · Stillwater → Salina
OK67 → KSWO
1
avg 49m · Ramsak → Stillwater
KSWO → KCUH
1
avg 10m · Stillwater → Cushing
0OK5 → KSWO
1
avg 30m · Chappell → Stillwater
04OK → KSWO
1
avg 50m · Stillwater Medical Center Heliport → Stillwater

Aircraft types

Equipment used on this number

1
PA44 PIPER Piper Seminole
115

Safety profile

Flagged flights · last 90 days

Go-arounds
0
Unstable approach
2
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 OST21

30
N800SUPIPER Piper Seminole
→
08/26/2026
1h 18m
No alerts
Replay Analysis
N800SUPIPER Piper Seminole
→
08/25/2026
3m
No alerts
Replay Analysis
N800SUPIPER Piper Seminole
→
08/25/2026
56m
No alerts
Replay Analysis
N800SUPIPER Piper Seminole
→
08/25/2026
4m
No alerts
Replay Analysis
N800SUPIPER Piper Seminole
→
08/25/2026
52m
No alerts
Replay Analysis
N800SUPIPER Piper Seminole
→
08/25/2026
30m
No alerts
Replay Analysis
N800SUPIPER Piper Seminole
→
08/24/2026
59m
No alerts
Replay Analysis
N800SUPIPER Piper Seminole
→
08/23/2026
25m
△ Low approach-stability score
Replay Analysis
N800SUPIPER Piper Seminole
→
08/23/2026
1h 4m
No alerts
Replay Analysis
N800SUPIPER Piper Seminole
→
08/23/2026
36m
No alerts
Replay Analysis
N800SUPIPER Piper Seminole
→
08/22/2026
35m
No alerts
Replay Analysis
N800SUPIPER Piper Seminole
→
08/22/2026
3m
No alerts
Replay Analysis
N800SUPIPER Piper Seminole
→
08/22/2026
3m
No alerts
Replay Analysis
N800SUPIPER Piper Seminole
→
08/22/2026
33m
No alerts
Replay Analysis
N800SUPIPER Piper Seminole
→
08/21/2026
55m
No alerts
Replay Analysis
N800SUPIPER Piper Seminole
→
08/21/2026
4m
No alerts
Replay Analysis
N800SUPIPER Piper Seminole
→
08/21/2026
57m
No alerts
Replay Analysis
N800SUPIPER Piper Seminole
→
08/21/2026
47m
No alerts
Replay Analysis
N800SUPIPER Piper Seminole
→
08/21/2026
59m
No alerts
Replay Analysis
N800SUPIPER Piper Seminole
→
08/19/2026
5m
No alerts
Replay Analysis
N800SUPIPER Piper Seminole
→
08/19/2026
49m
No alerts
Replay Analysis
N800SUPIPER Piper Seminole
→
08/19/2026
41m
No alerts
Replay Analysis
N800SUPIPER Piper Seminole
→
08/18/2026
54m
No alerts
Replay Analysis
N800SUPIPER Piper Seminole
→
08/18/2026
31m
No alerts
Replay Analysis
N800SUPIPER Piper Seminole
→
08/17/2026
25m
No alerts
Replay Analysis
N800SUPIPER Piper Seminole
→
08/17/2026
45m
No alerts
Replay Analysis
N800SUPIPER Piper Seminole
→
08/17/2026
50m
No alerts
Replay Analysis
N800SUPIPER Piper Seminole
→
08/12/2026
1h 2m
No alerts
Replay Analysis
N800SUPIPER Piper Seminole
→
08/10/2026
1h 14m
No alerts
Replay Analysis
N800SUPIPER Piper Seminole
→
08/07/2026
55m
No alerts
Replay Analysis
© SkyMeter · All flight data subject to ODbL attribution · Tracked: 90-day window