USM → LHR
Cheap flights from Koh Samui (USM) to London (LHR)
FYAVO compares fares from trusted travel partners for flights from Koh Samui to London. Pick a date to see live offers, then complete your booking on our partner's website.
Cheapest fares by date
| Date | Departs | Airline | Stops | Duration | Price | |
|---|---|---|---|---|---|---|
| Wed 11 Nov | 18:40 | PG | 2 | 21h 40m | $366 | See deals |
Prices are cached partner fares, updated 21 Oct 2026, 11:15 UTC, and are confirmed on the partner's website.
Questions travellers ask
What is the cheapest flight from Koh Samui to London?
The cheapest fare we found is $366 one way per adult, departing Wed 11 Nov with PG. Prices change often, so search live prices to confirm.
Are there direct flights from Koh Samui to London?
Among the fares we found, every flight on this route has at least one stop. Search live prices to see today's options.
How long is the flight from Koh Samui to London?
The quickest flight we found takes 21h 40m.
Which airlines fly from Koh Samui to London?
Fares we found are on these airlines (IATA codes): PG.
Does FYAVO charge a booking fee?
No. FYAVO is free: you compare prices here and book directly with the partner, paying the partner's own price.