ESR831

For travellers

Departure · Cheongju (CJJ)

Gate 5B

Scheduled 01 Oct 11:20 · Departed 01 Oct 11:31 · +11 min

Board status: Departed

Airborne since 01 Oct 11:31 (ADS-B)

Board data from cjj, updated 1530 min ago; times local to each airport.

Flight

Status

Incomplete (signal lost)

Departure

Cheongju International Airport/Cheongju Air Base (K-59/G-513) (CJJ) — Cheongju, South Korea

Scheduled departure

2026-10-01 02:20 UTC

Departed

2026-10-01 02:31 UTC

Arrival

Yanji Chaoyangchuan Airport (YNJ) — Yanji, China (scheduled)

Also flies as

ZE831

Distance flown

748 km

Straight-line distance

706 km

Aircraft

Registration

HL8549

Type

Boeing 737-800

Seats

189 total (189 Economy)

Altitude & speed

Max altitude

35,100 ft

Max ground speed

507 kt

Tracked

1h 6m · 746 km

Altitude (ft, max 35,100)

Ground speed (kt, max 507)

Altitude (ft, max 35,100)

Ground speed (kt, max 507)

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

Airlines

Korean Air (KAL)

T'way Air (TWB)

Latest flights

Departed	Flight	Route	Reg	Aircraft	Status	Distance
2026-10-01 02:31 UTC	ESR831	CJJ → YNJ Cheongju → Yanji	HL8549	Boeing 737-800	Incomplete (signal lost)	~1428 km est. (748 km recorded)
2026-09-29 02:27 UTC	ESR831	CJJ → ? Cheongju → ?	HL8587	Boeing 737-800	Incomplete (signal lost)	741 km
2026-09-26 02:35 UTC	ESR831	CJJ → ? Cheongju → ?	HL8546	Boeing 737-800	Incomplete (signal lost)	725 km
2026-09-24 02:24 UTC	ESR831	CJJ → ? Cheongju → ?	HL8549	Boeing 737-800	Incomplete (signal lost)	804 km
2026-09-22 02:55 UTC	ESR831	CJJ → ? Cheongju → ?	HL8578	Boeing 737-800	Incomplete (signal lost)	697 km
2026-09-19 02:26 UTC	ESR831	CJJ → ? Cheongju → ?	HL8546	Boeing 737-800	Incomplete (signal lost)	739 km
2026-09-17 02:28 UTC	ESR831	CJJ → ? Cheongju → ?	HL8546	Boeing 737-800	Incomplete (signal lost)	747 km
2026-09-15 02:27 UTC	ESR831	CJJ → ? Cheongju → ?	HL8549	Boeing 737-800	Incomplete (signal lost)	766 km
2026-09-12 02:36 UTC	ESR831	CJJ → ? Cheongju → ?	HL8546	Boeing 737-800	Incomplete (signal lost)	754 km
2026-09-10 02:58 UTC	ESR831	CJJ → ? Cheongju → ?	HL8549	Boeing 737-800	Incomplete (signal lost)	827 km
2026-09-08 03:08 UTC	ESR831	? → ?	HL8578	Boeing 737-800	Incomplete (signal lost)	701 km
2026-09-05 02:29 UTC	ESR831	? → ?	HL8545	Boeing 737-800	Incomplete (signal lost)	755 km
2026-09-03 02:44 UTC	ESR831	? → ?	HL8549	Boeing 737-800	Completed	1010 km
2026-09-01 02:33 UTC	ESR831	CJJ → ? Cheongju → ?	HL8507	Boeing 737-800	Completed	776 km
2026-08-29 02:21 UTC	ESR831	CJJ → ? Cheongju → ?	HL8549	Boeing 737-800	Completed	818 km
2026-08-27 02:53 UTC	ESR831	? → ?	HL8700	Boeing 737-800	Completed	405 km
2026-08-27 02:25 UTC	ESR831	CJJ → ? Cheongju → ?	HL8700	Boeing 737-800	Completed	314 km
2026-08-25 02:19 UTC	ESR831	CJJ → ? Cheongju → ?	HL8700	Boeing 737-800	Completed	780 km
2026-08-22 02:46 UTC	ESR831	CJJ → ? Cheongju → ?	HL8549	Boeing 737-800	Completed	965 km
2026-08-20 02:37 UTC	ESR831	CJJ → ? Cheongju → ?	HL8549	Boeing 737-800	Completed	1103 km
2026-08-18 02:47 UTC	ESR831	CJJ → ? Cheongju → ?	HL8549	Boeing 737-800	Completed	845 km