Route guide
London Bangkok
Heathrow (LHR) — Suvarnabhumi (BKK)
- Distance
- 9,540 km
- Duration
- 11.5h
- Time-zone shift
- 6h east
- Best window side
- right
Overview
London Heathrow to Bangkok — a long leisure corridor flown mostly overnight from London. The eastbound jet lag is moderate but real; aircraft choice meaningfully affects how you arrive.
Jet lag
6-hour eastward shift on an overnight from London. Use the flight for as much sleep as possible aligned to Bangkok night; get bright morning light on arrival; expect 3-4 days to feel fully aligned.
Build a LHR→BKK adaptation scheduleBest window side
Eastbound — for sleep, choose the window for shade control. The view side varies by routing (north over Europe and Central Asia), but glare management is the higher priority.
Cabin humidity
Thai's A350 and BA's 787-9 are noticeably easier on the cabin atmosphere than 777-300ER on an 11+ hour leg. Worth checking the aircraft on the day of booking.