ESR821

ESR · RK4B → CJJ

ESR821 is operated by between C-507 Heliport (RK4B) and Cheongju International Airport/Cheongju Air Base (K-59/G-513) (RKTU). The flight is most often flown by a BOEING Boeing 737-800. Typical block time is 2h 26m. SkyMeter has observed 9 legs of this flight number via ADS-B.

✈
FLIGHTS
9
last 90 days
⏱
AVG DURATION
2h 26m
tracked time
📅
SERVICE PERIOD
05/30/2025 → 07/04/2026
first → last seen
🗺
ROUTES / TYPES
4 / 2
city pairs · airframes
⚠
INCIDENT RATE
0.0%
0 flagged

Routes flown

By count · last 90 days

1
RK4B → RKTU
1
avg 6h 18m · C-507 Heliport → Cheongju International Airport/Cheongju Air Base (K-59/G-513)

Aircraft types

Equipment used on this number

2
B738 BOEING Boeing 737-800
7
B38M BOEING Boeing 737 MAX 8
2

Safety profile

Flagged flights · last 90 days

Go-arounds
0
Unstable approach
0
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 29 operations of ESR821

29
HL8578BOEING Boeing 737-800
→
07/04/2026
36m
No alerts
Replay Analysis
HL8544BOEING Boeing 737 MAX 8
→
07/01/2026
6h 17m
No alerts
Replay Analysis
HL8587BOEING Boeing 737-800
→
06/27/2026
36m
No alerts
Replay Analysis
HL8700BOEING Boeing 737-800
→
06/20/2026
37m
No alerts
Replay Analysis
HL8578BOEING Boeing 737-800
→
06/17/2026
39m
No alerts
Replay Analysis
HL8587BOEING Boeing 737-800
→
06/13/2026
38m
No alerts
Replay Analysis
HL8700BOEING Boeing 737-800
→
06/10/2026
6h 17m
No alerts
Replay Analysis
HL8700BOEING Boeing 737-800
→
06/06/2026
21m
No alerts
Replay Analysis
HL8544BOEING Boeing 737 MAX 8
→
06/03/2026
5h 49m
No alerts
Replay Analysis
HL8546BOEING Boeing 737-800
→
12/20/2025
5h 39m
No alerts
Replay Analysis
HL8588BOEING Boeing 737-800
→
12/17/2025
5h 51m
No alerts
Replay Analysis
HL8587BOEING Boeing 737-800
→
12/13/2025
6h 10m
No alerts
Replay Analysis
HL8587BOEING Boeing 737-800
→
12/06/2025
5h 39m
No alerts
Replay Analysis
HL8545BOEING Boeing 737-800
→
12/03/2025
5h 6m
No alerts
Replay Analysis
HL8545BOEING Boeing 737-800
→
11/29/2025
4h 5m
No alerts
Replay Analysis
HL8546BOEING Boeing 737-800
→
11/26/2025
4h 25m
No alerts
Replay Analysis
HL8546BOEING Boeing 737-800
→
11/22/2025
4h 9m
No alerts
Replay Analysis
HL8546BOEING Boeing 737-800
→
11/19/2025
4h 15m
No alerts
Replay Analysis
HL8599BOEING Boeing 737 MAX 8
→
11/15/2025
4h 57m
No alerts
Replay Analysis
HL8546BOEING Boeing 737-800
→
11/12/2025
4h 50m
No alerts
Replay Analysis
HL8717BOEING Boeing 737 MAX 8
→
11/08/2025
4h 36m
No alerts
Replay Analysis
HL8507BOEING Boeing 737-800
→
11/05/2025
5h 9m
No alerts
Replay Analysis
HL8545BOEING Boeing 737-800
→
06/22/2025
4h 12m
No alerts
Replay Analysis
HL8545BOEING Boeing 737-800
→
06/20/2025
4h 6m
No alerts
Replay Analysis
HL8546BOEING Boeing 737-800
→
06/18/2025
4h 4m
No alerts
Replay Analysis
HL8545BOEING Boeing 737-800
→
06/15/2025
7h 16m
No alerts
Replay Analysis
HL8546BOEING Boeing 737-800
→
06/08/2025
4h 15m
No alerts
Replay Analysis
HL8545BOEING Boeing 737-800
→
06/04/2025
7h 38m
No alerts
Replay Analysis
HL8549BOEING Boeing 737-800
→
05/30/2025
3h 51m
No alerts
Replay Analysis
© SkyMeter · All flight data subject to ODbL attribution · Tracked: 90-day window