Airports › Hong Kong to London

CX 251Hong Kong to London

Cathay Pacific🇭🇰HKG🇬🇧LHRHong Kong International Airport to London Heathrow Airport
Departs
22:45
local to Hong Kong
Operates
Daily
S26 schedule
Distance
9,630 km
5,984 miles
Typical delay
29 min
40 departures

The route

Great circle, 9,630 km
HKGLHR9,630 km
9,630 km (5,984 miles) great-circle, measured between the two airports' published coordinates. The line is the shortest path over the globe, which on a flat map bows away from a straight line.

What flies it

59 sightings

B77W.

Aircraft types we recorded on this flight. A type is never inferred from the route, so a flight we have not seen closely shows none.

How delayed is CX 251?

Measured over months

This flight leaves Hong Kong International Airport a typical 29 minutes late (likely 24 to 33), across 40 departures we tracked between 2026-03-08 and 2026-09-06.

median delay of tracked departures on this leg. Flight Owl's own resolved departure predictions (flights our users tracked), not a census of all flights at the airport.

Other flights on this route

1 more
FlightAirlineDepartsDepartures seen
CX 257Cathay Pacific08:0549

Where it goes

HKG → LHRHong Kong to LondonEvery airline on this routeHKGHong Kong International AirportDeparture airportLHRLondon Heathrow AirportArrival airport

How these numbers are measured