UAL821 is operated by UNITED AIRLINES INC between Suvarnabhumi Airport (VTBS) and Hong Kong International Airport (VHHH). The flight is most often flown by a BOEING Boeing 787-9 Dreamliner. Typical block time is 2h 34m. SkyMeter has observed 238 legs of this flight number via ADS-B.

✈
FLIGHTS
238
last 90 days
⏱
AVG DURATION
2h 34m
tracked time
📅
SERVICE PERIOD
05/27/2025 → 08/31/2026
first → last seen
🗺
ROUTES / TYPES
8 / 1
city pairs · airframes
⚠
INCIDENT RATE
0.0%
0 flagged

Routes flown

By count · last 90 days

4
VTBS → VHHH
77
avg 2h 56m · Suvarnabhumi → Hong Kong
HK-0061 → VHHH
2
avg 14m · Sha Chau Helipad → Hong Kong
VHHH → PHNL
1
avg 9h 53m · Hong Kong → Daniel K Inouye
PHNL → KLAX
1
avg 4h 51m · Daniel K Inouye → Los Angeles

Aircraft types

Equipment used on this number

1
B789 BOEING Boeing 787-9 Dreamliner
238

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 30 operations of UAL821

30
N15969BOEING Boeing 787-9 Dreamliner
→
08/31/2026
3h 43m
No alerts
Replay Analysis
N15969BOEING Boeing 787-9 Dreamliner
→
08/31/2026
2h 32m
No alerts
Replay Analysis
N26970BOEING Boeing 787-9 Dreamliner
→
08/29/2026
4h 3m
No alerts
Replay Analysis
N26970BOEING Boeing 787-9 Dreamliner
→
08/29/2026
2h 59m
No alerts
Replay Analysis
N24974BOEING Boeing 787-9 Dreamliner
→
08/28/2026
2h 19m
No alerts
Replay Analysis
N24974BOEING Boeing 787-9 Dreamliner
→
08/28/2026
3h 1m
No alerts
Replay Analysis
N26952BOEING Boeing 787-9 Dreamliner
→
08/28/2026
1h 40m
No alerts
Replay Analysis
N26952BOEING Boeing 787-9 Dreamliner
→
08/27/2026
4h 5m
No alerts
Replay Analysis
N26952BOEING Boeing 787-9 Dreamliner
→
08/27/2026
2h 57m
No alerts
Replay Analysis
N24979BOEING Boeing 787-9 Dreamliner
→
08/26/2026
4h 2m
No alerts
Replay Analysis
N24979BOEING Boeing 787-9 Dreamliner
→
08/26/2026
3h 5m
No alerts
Replay Analysis
N24993BOEING Boeing 787-9 Dreamliner
→
08/26/2026
1h 20m
No alerts
Replay Analysis
N24993BOEING Boeing 787-9 Dreamliner
→
08/25/2026
4h 25m
No alerts
Replay Analysis
N24993BOEING Boeing 787-9 Dreamliner
→
08/25/2026
3h 7m
No alerts
Replay Analysis
N24979BOEING Boeing 787-9 Dreamliner
→
08/25/2026
1h 37m
No alerts
Replay Analysis
N24979BOEING Boeing 787-9 Dreamliner
→
08/24/2026
4h 17m
No alerts
Replay Analysis
N24979BOEING Boeing 787-9 Dreamliner
→
08/24/2026
3h 2m
No alerts
Replay Analysis
N29975BOEING Boeing 787-9 Dreamliner
→
08/23/2026
4h 23m
No alerts
Replay Analysis
N29975BOEING Boeing 787-9 Dreamliner
→
08/23/2026
2h 49m
No alerts
Replay Analysis
N13954BOEING Boeing 787-9 Dreamliner
→
08/23/2026
1h 19m
No alerts
Replay Analysis
N13954BOEING Boeing 787-9 Dreamliner
→
08/22/2026
3h 52m
No alerts
Replay Analysis
N13954BOEING Boeing 787-9 Dreamliner
→
08/22/2026
3h 7m
No alerts
Replay Analysis
N26970BOEING Boeing 787-9 Dreamliner
→
08/22/2026
1h 48m
No alerts
Replay Analysis
N26970BOEING Boeing 787-9 Dreamliner
→
08/21/2026
4h 2m
No alerts
Replay Analysis
N26970BOEING Boeing 787-9 Dreamliner
→
08/21/2026
2h 53m
No alerts
Replay Analysis
N27965BOEING Boeing 787-9 Dreamliner
→
08/21/2026
1h 34m
No alerts
Replay Analysis
N27965BOEING Boeing 787-9 Dreamliner
→
08/20/2026
4h 15m
No alerts
Replay Analysis
N27965BOEING Boeing 787-9 Dreamliner
→
08/20/2026
3h 20m
No alerts
Replay Analysis
N29975BOEING Boeing 787-9 Dreamliner
→
08/20/2026
1h 27m
No alerts
Replay Analysis
N29975BOEING Boeing 787-9 Dreamliner
→
08/19/2026
4h 8m
No alerts
Replay Analysis
© SkyMeter · All flight data subject to ODbL attribution · Tracked: 90-day window