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 48m. SkyMeter has observed 97 legs of this flight number via ADS-B.

✈
FLIGHTS
97
last 90 days
⏱
AVG DURATION
48m
tracked time
📅
SERVICE PERIOD
05/28/2025 → 06/25/2026
first → last seen
🗺
ROUTES / TYPES
18 / 1
city pairs · airframes
⚠
INCIDENT RATE
1.0%
1 flagged

Routes flown

By count · last 90 days

10
88OK → KSWO
7
avg 6m · Hilltop → Stillwater
KADM → KSWO
2
avg 52m · Ardmore → Stillwater
KSWO → KADM
2
avg 47m · Stillwater → Ardmore
OK38 → KSWO
2
avg 8m · Stillwater Medical-Perry Heliport → Stillwater
KSWO → KCUH
1
avg 10m · Stillwater → Cushing
KSWO → 3OL8
1
avg 43m · Stillwater → Harrison
KSWO → KF22
1
avg 49m · Stillwater → Perry
OK67 → KSWO
1
avg 49m · Ramsak → Stillwater
KSWO → KSLN
1
avg 2h 1m · Stillwater → Salina
KSWO → 1K1
1
avg 3h 34m · Stillwater → Lloyd Stearman Field

Aircraft types

Equipment used on this number

1
PA44 PIPER Piper Seminole
105

Safety profile

Flagged flights · last 90 days

Go-arounds
0
Unstable approach
1
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
→
06/25/2026
9m
No alerts
Replay Analysis
N800SUPIPER Piper Seminole
→
06/17/2026
5m
No alerts
Replay Analysis
N800SUPIPER Piper Seminole
→
06/17/2026
48m
No alerts
Replay Analysis
N800SUPIPER Piper Seminole
→
06/17/2026
38m
No alerts
Replay Analysis
N800SUPIPER Piper Seminole
→
06/17/2026
1h 3m
No alerts
Replay Analysis
N800SUPIPER Piper Seminole
→
06/16/2026
53m
No alerts
Replay Analysis
N800SUPIPER Piper Seminole
→
06/16/2026
1h 1m
No alerts
Replay Analysis
N800SUPIPER Piper Seminole
→
06/16/2026
4m
No alerts
Replay Analysis
N800SUPIPER Piper Seminole
→
06/16/2026
57m
No alerts
Replay Analysis
N800SUPIPER Piper Seminole
→
06/16/2026
4m
No alerts
Replay Analysis
N800SUPIPER Piper Seminole
→
06/16/2026
52m
No alerts
Replay Analysis
N800SUPIPER Piper Seminole
→
06/16/2026
2h 28m
No alerts
Replay Analysis
N800SUPIPER Piper Seminole
→
06/16/2026
5h 8m
No alerts
Replay Analysis
N800SUPIPER Piper Seminole
→
06/16/2026
51m
No alerts
Replay Analysis
N800SUPIPER Piper Seminole
→
06/15/2026
5h 15m
No alerts
Replay Analysis
N800SUPIPER Piper Seminole
→
06/15/2026
6m
No alerts
Replay Analysis
N800SUPIPER Piper Seminole
→
06/15/2026
48m
No alerts
Replay Analysis
N800SUPIPER Piper Seminole
→
06/15/2026
46m
No alerts
Replay Analysis
N800SUPIPER Piper Seminole
→
06/14/2026
26m
No alerts
Replay Analysis
N800SUPIPER Piper Seminole
→
06/13/2026
49m
No alerts
Replay Analysis
N800SUPIPER Piper Seminole
→
06/13/2026
22m
No alerts
Replay Analysis
N800SUPIPER Piper Seminole
→
06/13/2026
1h 6m
No alerts
Replay Analysis
N800SUPIPER Piper Seminole
→
06/12/2026
52m
No alerts
Replay Analysis
N800SUPIPER Piper Seminole
→
06/10/2026
57m
No alerts
Replay Analysis
N800SUPIPER Piper Seminole
→
06/09/2026
53m
No alerts
Replay Analysis
N800SUPIPER Piper Seminole
→
06/09/2026
5m
No alerts
Replay Analysis
N800SUPIPER Piper Seminole
→
06/08/2026
6m
No alerts
Replay Analysis
N800SUPIPER Piper Seminole
→
06/08/2026
51m
No alerts
Replay Analysis
N800SUPIPER Piper Seminole
→
06/08/2026
55m
No alerts
Replay Analysis
N800SUPIPER Piper Seminole
→
06/01/2026
38m
No alerts
Replay Analysis
© SkyMeter · All flight data subject to ODbL attribution · Tracked: 90-day window