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Route guide

London Hong Kong

Heathrow (LHR) — Hong Kong International (HKG)

Eastbound 8h shift Best side: right
Distance
9,650 km
Duration
12h
Time-zone shift
8h east
Best window side
right

Overview

London Heathrow to Hong Kong — a benchmark Europe-to-Asia long-haul, usually overnight from London. Long enough that aircraft and jet-lag prep both matter.

Jet lag

8-hour eastward shift — large enough that pre-flight schedule shifting (2 nights of earlier bedtime) is worth it. Plan 4-5 days for full adaptation; morning light at destination is the lever.

Build a LHR→HKG adaptation schedule

Best window side

Eastbound polar-ish routing — the right side typically tracks toward sunrise late in the flight; for sleep, the side that lets you control the shade matters more.

Cabin humidity

Cathay's A350-1000 is one of the more humid long-haul cabins available — meaningful on a 12-hour eastbound. Their older 777-300ERs are drier.

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