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UAL821

BKK → HKG · Boeing 787-9 · United Airlines

For travellers

Arrival · Hong Kong (HKG)

Baggage belt 10
Scheduled 28 Sep 19:45 · Landed 28 Sep 19:44
Board status: At gate 19:44
Landed 28 Sep 19:44 (airport data)

Board data from hongkong, updated 5697 min ago; times local to each airport.

Flight

Status
Completed (landing confirmed by airport data)
Arrival confirmed via
Airport data (confirmed)
Departure
Suvarnabhumi Airport (BKK) — Bangkok, Thailand
Departed
2026-09-28 09:10 UTC
Arrival
Hong Kong International Airport (HKG) — Hong Kong, Hong Kong
Scheduled arrival
2026-09-28 11:45 UTC
Estimated arrival
2026-09-28 11:26 UTC
Also flies as
UA821
Distance flown
489 km
Straight-line distance
1689 km

Aircraft

Registration
N28987
Type
Boeing 787-9
Seats
257 total (149 Economy, 39 Economy Plus, 21 Premium Plus, 48 Polaris)
CO2 (EMEP est., total)
82.2 t (669 kg/pax Business, 302 kg/pax Premium Economy, 234 kg/pax Economy)

Altitude & speed

Max altitude
37,000 ft
Max ground speed
496 kt
Tracked
36m · 486 km
Altitude (ft, max 37,000)
019,98039,9600m30m
Ground speed (kt, max 496)
02685360m30m
Altitude (ft, max 37,000)
019,98039,9600m
Ground speed (kt, max 496)
02685360m

From the ADS-B positions we received; time since the first fix. A dashed stretch is a gap in reception, bridged by a straight line.

Route map

Airline

United Airlines (UAL)

Latest flights

DepartedFlightRouteRegAircraftStatusDistance
2026-10-02 14:13 UTC UAL821 HKG → HNL
Hong Kong → Honolulu
 N27959 Boeing 787-9 In progress ~8947 km est.
2026-10-02 09:00 UTC UAL821 BKK → HKG
Bangkok → Hong Kong
 N27959 Boeing 787-9 Completed 1838 km
2026-10-02 01:11 UTC UAL821 ? → LAX
? → Los Angeles
 N30PX GULFSTREAM AEROSPACE Gulfstream G280 Completed 1036 km
2026-10-01 14:03 UTC UAL821 HKG → LAX
Hong Kong → Los Angeles
 N30PX GULFSTREAM AEROSPACE Gulfstream G280 Incomplete (signal lost) ~11918 km est. (3489 km recorded)
2026-10-01 09:04 UTC UAL821 BKK → HKG
Bangkok → Hong Kong
 N30PX GULFSTREAM AEROSPACE Gulfstream G280 Completed 1927 km
2026-09-30 21:49 UTC UAL821 ? → LAX
? → Los Angeles
 N24974 Boeing 787-9 Completed 1494 km
2026-09-30 13:51 UTC UAL821 HKG → LAX
Hong Kong → Los Angeles
 N24974 Boeing 787-9 Incomplete (signal lost) ~11921 km est. (3498 km recorded)
2026-09-30 08:59 UTC UAL821 BKK → HKG
Bangkok → Hong Kong
 N24974 Boeing 787-9 Completed 1869 km
2026-09-30 01:20 UTC UAL821 ? → LAX
? → Los Angeles
 N13954 Boeing 787-9 Completed 1490 km
2026-09-29 14:00 UTC UAL821 HKG → LAX
Hong Kong → Los Angeles
 N13954 Boeing 787-9 Incomplete (signal lost) ~12065 km est. (1834 km recorded)
2026-09-29 10:33 UTC UAL821 ? → HKG
? → Hong Kong
 N13954 Boeing 787-9 Completed 792 km
2026-09-29 09:17 UTC UAL821 BKK → HKG
Bangkok → Hong Kong
 N13954 Boeing 787-9 Completed (landing confirmed by airport data) ~1774 km est. (483 km recorded)
2026-09-28 14:03 UTC UAL821 HKG → LAX
Hong Kong → Los Angeles
 N28987 Boeing 787-9 Completed 12024 km
2026-09-28 10:23 UTC UAL821 ? → HKG
? → Hong Kong
 N28987 Boeing 787-9 Completed 803 km
2026-09-28 09:10 UTC UAL821 BKK → HKG
Bangkok → Hong Kong
 N28987 Boeing 787-9 Completed (landing confirmed by airport data) ~1767 km est. (489 km recorded)
2026-09-27 14:20 UTC UAL821 HKG → LAX
Hong Kong → Los Angeles
 N24976 Boeing 787-9 Completed 11904 km
2026-09-27 09:54 UTC UAL821 BKK → HKG
Bangkok → Hong Kong
 N24976 Boeing 787-9 Completed 1845 km
2026-09-26 15:05 UTC UAL821 HKG → LAX
Hong Kong → Los Angeles
 N29981 Boeing 787-9 Completed 11904 km
2026-09-26 09:43 UTC UAL821 BKK → HKG
Bangkok → Hong Kong
 N29981 Boeing 787-9 Completed 1857 km
2026-09-25 14:26 UTC UAL821 HKG → LAX
Hong Kong → Los Angeles
 N26952 Boeing 787-9 Completed 11930 km
2026-09-25 12:04 UTC UAL821 HKG → HKG
Hong Kong → Hong Kong
 N26952 Boeing 787-9 Completed 91 km
2026-09-25 10:12 UTC UAL821 BKK → HKG
Bangkok → Hong Kong
 N26952 Boeing 787-9 Completed (landing confirmed by airport data) ~1772 km est. (486 km recorded)
2026-09-24 14:04 UTC UAL821 HKG → LAX
Hong Kong → Los Angeles
 N13954 Boeing 787-9 Completed 11944 km
2026-09-24 11:05 UTC UAL821 ? → HKG
? → Hong Kong
 N13954 Boeing 787-9 Completed 113 km
2026-09-24 09:06 UTC UAL821 BKK → HKG
Bangkok → Hong Kong
 N13954 Boeing 787-9 Completed (landing confirmed by airport data) ~1769 km est. (457 km recorded)
2026-09-23 14:05 UTC UAL821 HKG → LAX
Hong Kong → Los Angeles
 N38955 Boeing 787-9 Completed 12003 km
2026-09-23 10:12 UTC UAL821 ? → HKG
? → Hong Kong
 N38955 Boeing 787-9 Completed 969 km
2026-09-23 09:14 UTC UAL821 BKK → HKG
Bangkok → Hong Kong
 N38955 Boeing 787-9 Completed (landing confirmed by airport data) ~1751 km est. (458 km recorded)
2026-09-22 14:12 UTC UAL821 HKG → LAX
Hong Kong → Los Angeles
 N19951 Boeing 787-9 Completed 11968 km
2026-09-22 09:08 UTC UAL821 BKK → HKG
Bangkok → Hong Kong
 N19951 Boeing 787-9 Completed 1761 km
2026-09-21 14:02 UTC UAL821 HKG → LAX
Hong Kong → Los Angeles
 N38950 Boeing 787-9 Completed 12074 km
2026-09-21 09:25 UTC UAL821 BKK → HKG
Bangkok → Hong Kong
 N38950 Boeing 787-9 Completed 1761 km
2026-09-20 14:10 UTC UAL821 HKG → LAX
Hong Kong → Los Angeles
 N19951 Boeing 787-9 Completed 12087 km
2026-09-20 09:05 UTC UAL821 BKK → HKG
Bangkok → Hong Kong
 N19951 Boeing 787-9 Completed 1845 km
2026-09-19 14:10 UTC UAL821 HKG → LAX
Hong Kong → Los Angeles
 N29981 Boeing 787-9 Completed 12111 km
2026-09-19 09:04 UTC UAL821 BKK → HKG
Bangkok → Hong Kong
 N29981 Boeing 787-9 Completed 1816 km
2026-09-18 14:02 UTC UAL821 HKG → LAX
Hong Kong → Los Angeles
 N36962 Boeing 787-9 Completed 12076 km
2026-09-18 09:13 UTC UAL821 BKK → HKG
Bangkok → Hong Kong
 N36962 Boeing 787-9 Completed 1812 km
2026-09-17 14:09 UTC UAL821 HKG → LAX
Hong Kong → Los Angeles
 N29981 Boeing 787-9 Completed 12111 km
2026-09-17 09:42 UTC UAL821 BKK → HKG
Bangkok → Hong Kong
 N29981 Boeing 787-9 Completed 1848 km
2026-09-16 14:06 UTC UAL821 HKG → LAX
Hong Kong → Los Angeles
 N26967 Boeing 787-9 Completed 12073 km
2026-09-16 10:23 UTC UAL821 HKG → HKG
Hong Kong → Hong Kong
 N26967 Boeing 787-9 Completed 750 km
2026-09-16 09:08 UTC UAL821 BKK → HKG
Bangkok → Hong Kong
 N26967 Boeing 787-9 Completed (landing confirmed by airport data) ~1819 km est. (544 km recorded)
2026-09-14 14:01 UTC UAL821 HKG → LAX
Hong Kong → Los Angeles
 N27957 Boeing 787-9 Completed 12206 km
2026-09-14 09:27 UTC UAL821 BKK → HKG
Bangkok → Hong Kong
 N27957 Boeing 787-9 Completed 1847 km
2026-09-13 14:01 UTC UAL821 HKG → LAX
Hong Kong → Los Angeles
 N29981 Boeing 787-9 Completed 12075 km
2026-09-13 08:56 UTC UAL821 BKK → HKG
Bangkok → Hong Kong
 N29981 Boeing 787-9 Completed 1799 km
2026-09-12 14:11 UTC UAL821 HKG → LAX
Hong Kong → Los Angeles
 N29989 Boeing 787-9 Completed 12111 km
2026-09-12 09:07 UTC UAL821 BKK → HKG
Bangkok → Hong Kong
 N29989 Boeing 787-9 Completed 1771 km
2026-09-11 14:07 UTC UAL821 HKG → LAX
Hong Kong → Los Angeles
 N29961 Boeing 787-9 Completed 12097 km

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