NDU21 is operated by UNIVERSITY OF NORTH DAKOTA, C/O JOHN D ODEGARD SCHOOL OF AEROSP between Heyde Airport (8ND4) and Grand Forks International Airport (KGFK). The flight is most often flown by a PIPER Piper Cherokee. Typical block time is 0h 30m. SkyMeter has observed 431 legs of this flight number via ADS-B.

✈
FLIGHTS
431
last 90 days
⏱
AVG DURATION
30m
tracked time
📅
SERVICE PERIOD
6/5/2025 → 8/15/2026
first → last seen
🗺
ROUTES / TYPES
95 / 1
city pairs · airframes
⚠
INCIDENT RATE
5.3%
23 flagged

Routes flown

By count · last 90 days

10
8ND4 → KGFK
23
avg 11m · Heyde → Grand Forks
2MN0 → KGFK
21
avg 11m · Pribbs Field → Grand Forks
MN81 → KGFK
14
avg 6m · J J and T → Grand Forks
KCKN → KGFK
14
avg 21m · Crookston Municipal Kirkwood Field → Grand Forks
KGFK → KCKN
14
avg 21m · Grand Forks → Crookston Municipal Kirkwood Field
KGFK → D06
11
avg 17m · Grand Forks → Minto
KGFK → KGAF
10
avg 28m · Grand Forks → Hutson Field
KGFK → KD37
8
avg 27m · Grand Forks → Warren
4ND1 → KGFK
7
avg 6m · Knutson → Grand Forks
KGFK → K4V4
7
avg 25m · Grand Forks → Northwood Municipal Vince Field

Aircraft types

Equipment used on this number

1
P28A PIPER Piper Cherokee
435

Safety profile

Flagged flights · last 90 days

Go-arounds
0
Unstable approach
23
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 NDU21

30
N921NDPIPER Piper Cherokee
→
8/15/2026
9m
No alerts
Replay Analysis
N921NDPIPER Piper Cherokee
→
8/14/2026
8m
No alerts
Replay Analysis
N921NDPIPER Piper Cherokee
→
8/14/2026
1h 0m
No alerts
Replay Analysis
N921NDPIPER Piper Cherokee
→
8/14/2026
21m
No alerts
Replay Analysis
N921NDPIPER Piper Cherokee
→
8/14/2026
22m
No alerts
Replay Analysis
N921NDPIPER Piper Cherokee
→
8/14/2026
3h 43m
No alerts
Replay Analysis
N921NDPIPER Piper Cherokee
→
8/14/2026
13m
No alerts
Replay Analysis
N921NDPIPER Piper Cherokee
→
8/14/2026
18m
No alerts
Replay Analysis
N921NDPIPER Piper Cherokee
→
8/14/2026
1h 2m
No alerts
Replay Analysis
N921NDPIPER Piper Cherokee
→
8/14/2026
6m
No alerts
Replay Analysis
N921NDPIPER Piper Cherokee
→
8/14/2026
9m
No alerts
Replay Analysis
N921NDPIPER Piper Cherokee
→
8/14/2026
6m
No alerts
Replay Analysis
N921NDPIPER Piper Cherokee
→
8/14/2026
8m
No alerts
Replay Analysis
N921NDPIPER Piper Cherokee
→
8/13/2026
1h 41m
No alerts
Replay Analysis
N921NDPIPER Piper Cherokee
→
8/13/2026
3m
No alerts
Replay Analysis
N921NDPIPER Piper Cherokee
→
8/13/2026
5m
No alerts
Replay Analysis
N921NDPIPER Piper Cherokee
→
8/13/2026
10m
No alerts
Replay Analysis
N921NDPIPER Piper Cherokee
→
8/13/2026
4m
△ Low approach-stability score
Replay Analysis
N921NDPIPER Piper Cherokee
→
8/13/2026
8m
No alerts
Replay Analysis
N921NDPIPER Piper Cherokee
→
8/13/2026
11m
No alerts
Replay Analysis
N921NDPIPER Piper Cherokee
→
8/13/2026
50m
No alerts
Replay Analysis
N921NDPIPER Piper Cherokee
→
8/12/2026
9m
No alerts
Replay Analysis
N921NDPIPER Piper Cherokee
→
8/12/2026
1h 13m
No alerts
Replay Analysis
N921NDPIPER Piper Cherokee
→
8/11/2026
5m
No alerts
Replay Analysis
N921NDPIPER Piper Cherokee
→
8/11/2026
15m
No alerts
Replay Analysis
N921NDPIPER Piper Cherokee
→
8/11/2026
25m
No alerts
Replay Analysis
N921NDPIPER Piper Cherokee
→
8/11/2026
36m
No alerts
Replay Analysis
N921NDPIPER Piper Cherokee
→
8/11/2026
5m
No alerts
Replay Analysis
N921NDPIPER Piper Cherokee
→
8/11/2026
8m
No alerts
Replay Analysis
N921NDPIPER Piper Cherokee
→
8/11/2026
5m
No alerts
Replay Analysis
© SkyMeter · All flight data subject to ODbL attribution · Tracked: 90-day window