How long is the CX251 flight from Hong Kong to London?

The timetable allows 14 h 25 min. Hong Kong to London is 9,630 km (5,984 mi).

Which terminal does CX251 use?

It usually leaves from Terminal 1 at Hong Kong International Airport (HKG) and arrives at Terminal 3 at London Heathrow Airport (LHR). Check the flight card above for today's terminal and gate.

What other flight numbers does CX251 have?

Also listed as CPA251 (Cathay Pacific's ICAO code) and CX 251.

CX251 Flight Status Cathay Pacific: Hong Kong to London (CPA251)

Cathay Pacific CX 251

Scheduled in 4h27'

HKG Hong Kong

Scheduled: 23:00
Estimated: 23:00

Terminal: 1

Departure: Sat, Nov 14, 2026 · local time UTC+8

Hong Kong International Airport (HKG)

All HKG Departures >

LHR London

Scheduled: 05:25
Estimated
Delay

Terminal: 3

Arrival: Sun, Nov 15, 2026 · local time GMT

London Heathrow Airport (LHR)

All LHR Arrivals >

Departs in 4h 27m 0%

HKG 23:00 LHR 05:25 ⁺¹

9,630 km (5,984 mi) to fly

Estimated position based on departure and arrival times, not live tracking. Times are local at each airport.

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Distance: 9630 km / 5984 miles · Scheduled Duration: 14:25 · Typical Duration: 13:40

CX 251 Flight Status & Schedule Cathay Pacific Hong Kong to London

Date	From	To	Departure	Arrival	Status	Details
Nov 14	HKG	LHR	23:00	05:25	Scheduled	Track >
Nov 13	HKG	LHR	23:59	05:40	Landed Late	Track >
Nov 12	HKG	LHR	23:59	05:36	Landed	Track >
Nov 11	HKG	LHR	23:15	04:54	Landed	Track >
Nov 10	HKG	LHR	23:28	05:00	Landed	Track >
Nov 09	HKG	LHR	23:34	05:27	Landed	Track >
Nov 08	HKG	LHR	23:23	05:17	Landed	Track >
Nov 07	HKG	LHR	23:32	05:07	Landed	Track >
Nov 06	HKG	LHR	23:19	04:57	Landed	Track >
Nov 05	HKG	LHR	23:40	05:25	Landed	Track >

Cathay Pacific's Hong Kong–London flight covers 9,630 km (5,984 mi) and runs daily. Its timetable allows 14 h 25 min; in practice it usually takes about 13 h 40 min, so it often makes up time. Today's flight is scheduled to leave at 23:00 and arrive at 05:25 the next morning local time.

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About CX 251

Cathay Pacific Flight CX251 connects Hong Kong, Hong Kong to London, United Kingdom, taking off from Hong Kong International Airport HKG and landing at London Heathrow Airport LHR.

Route: Hong Kong International Airport HKG to London Heathrow Airport LHR
Distance: 9,630 km (5,984 mi)
Typical flight time: 13 h 40 min
Flies: Daily
On time: 8 of the last 9
Average delay when late: 15 min
Usually departs from: Terminal 1

CX 251 FAQ

How long is the CX251 flight from Hong Kong to London?: The timetable allows 14 h 25 min. Hong Kong to London is 9,630 km (5,984 mi).
How often is CX251 from Hong Kong to London late?: 1 of the last 9 flights arrived 15 or more minutes late; when late, by 15 minutes on average.
When was the latest CX251 flight from Hong Kong to London?: The latest CX251 was the 23:00 (local time) departure from Hong Kong on 13 November 2026; it landed 15 minutes late.
Which days does CX251 fly from Hong Kong to London?: Daily: it was scheduled on each of the last 7 days.
Which terminal does CX251 use?: It usually leaves from Terminal 1 at Hong Kong International Airport (HKG) and arrives at Terminal 3 at London Heathrow Airport (LHR). Check the flight card above for today's terminal and gate.
What other flight numbers does CX251 have?: Also listed as CPA251 (Cathay Pacific's ICAO code) and CX 251.

CX251 and Hong Kong HKG to London LHR Flights

Other flights departing from Hong Kong HKG: UO506, PR311, HX80

Other flights arriving at London LHR: BA16, BA34, QF219

All flights connecting Hong Kong HKG to London LHR.