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 90 legs of this flight number via ADS-B.

✈
FLIGHTS
90
last 90 days
⏱
AVG DURATION
48m
tracked time
📅
SERVICE PERIOD
5/28/2025 → 8/12/2026
first → last seen
🗺
ROUTES / TYPES
15 / 1
city pairs · airframes
⚠
INCIDENT RATE
1.1%
1 flagged

Routes flown

By count · last 90 days

10
88OK → KSWO
4
avg 9m · Hilltop → Stillwater
KSWO → KRVS
2
avg 51m · Stillwater → Richard Lloyd Jones Jr
KRVS → KSWO
2
avg 32m · Richard Lloyd Jones Jr → Stillwater
KSWO → KSLN
1
avg 2h 1m · Stillwater → Salina
KSWO → KCUH
1
avg 10m · Stillwater → Cushing
OK38 → KSWO
1
avg 6m · Stillwater Medical-Perry Heliport → Stillwater
OK67 → KSWO
1
avg 49m · Ramsak → Stillwater
KSLN → KPNC
1
avg 1h 11m · Salina → Ponca City
OK65 → KSWO
1
avg 13m · Cushing Regional Hospital Heliport → Stillwater
US-0859 → KSWO
1
avg 17m · Red Rock South → Stillwater

Aircraft types

Equipment used on this number

1
PA44 PIPER Piper Seminole
98

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
→
8/12/2026
1h 2m
No alerts
Replay Analysis
N800SUPIPER Piper Seminole
→
8/10/2026
1h 14m
No alerts
Replay Analysis
N800SUPIPER Piper Seminole
→
8/7/2026
55m
No alerts
Replay Analysis
N800SUPIPER Piper Seminole
→
8/6/2026
26m
No alerts
Replay Analysis
N800SUPIPER Piper Seminole
→
8/6/2026
5m
No alerts
Replay Analysis
N800SUPIPER Piper Seminole
→
8/6/2026
43m
No alerts
Replay Analysis
N800SUPIPER Piper Seminole
→
8/6/2026
37m
No alerts
Replay Analysis
N800SUPIPER Piper Seminole
→
8/5/2026
1h 5m
No alerts
Replay Analysis
N800SUPIPER Piper Seminole
→
8/5/2026
1h 0m
No alerts
Replay Analysis
N800SUPIPER Piper Seminole
→
8/3/2026
1h 23m
No alerts
Replay Analysis
N800SUPIPER Piper Seminole
→
7/29/2026
50m
No alerts
Replay Analysis
N800SUPIPER Piper Seminole
→
7/27/2026
59m
No alerts
Replay Analysis
N800SUPIPER Piper Seminole
→
7/27/2026
1h 9m
No alerts
Replay Analysis
N800SUPIPER Piper Seminole
→
7/23/2026
22m
△ Low approach-stability score
Replay Analysis
N800SUPIPER Piper Seminole
→
7/23/2026
1h 17m
No alerts
Replay Analysis
N800SUPIPER Piper Seminole
→
7/23/2026
48m
No alerts
Replay Analysis
N800SUPIPER Piper Seminole
→
7/23/2026
42m
No alerts
Replay Analysis
N800SUPIPER Piper Seminole
→
7/23/2026
1h 8m
No alerts
Replay Analysis
N800SUPIPER Piper Seminole
→
7/22/2026
54m
No alerts
Replay Analysis
N800SUPIPER Piper Seminole
→
7/20/2026
1h 6m
No alerts
Replay Analysis
N800SUPIPER Piper Seminole
→
7/19/2026
4m
No alerts
Replay Analysis
N800SUPIPER Piper Seminole
→
7/19/2026
55m
No alerts
Replay Analysis
N800SUPIPER Piper Seminole
→
7/18/2026
4m
No alerts
Replay Analysis
N800SUPIPER Piper Seminole
→
7/18/2026
39m
No alerts
Replay Analysis
N800SUPIPER Piper Seminole
→
7/18/2026
1h 6m
No alerts
Replay Analysis
N800SUPIPER Piper Seminole
→
7/17/2026
13m
No alerts
Replay Analysis
N800SUPIPER Piper Seminole
→
7/17/2026
18m
No alerts
Replay Analysis
N800SUPIPER Piper Seminole
→
7/16/2026
18m
No alerts
Replay Analysis
N800SUPIPER Piper Seminole
→
7/16/2026
37m
No alerts
Replay Analysis
N800SUPIPER Piper Seminole
→
7/16/2026
6m
No alerts
Replay Analysis
© SkyMeter · All flight data subject to ODbL attribution · Tracked: 90-day window