Cheap flights London to Koh Samui
Cheap flights London to Koh Samui are always a connecting trip — no airline flies the route non-stop, so you change planes somewhere in Europe, the Gulf or Asia before landing on the island. That makes the journey long, and it makes your layover and your airline matter as much as the fare itself. Compare the whole month before you commit, because this route moves a lot between seasons.
Prices found on this route
Lowest fare found per airline in recent searches — click to search that date on kissandfly.com
| Airline | Flight | Rating | Date | Price from | Search |
|---|---|---|---|---|---|
| with a stop | ★★★★★ 4.5 | 7 Dec 2026 | from $882 | Search 7 Dec 2026 | |
| with a stop | ★★★★★ 4.7 | 7 Dec 2026 | from $933 | Search 7 Dec 2026 | |
| with a stop | ★★★★★ 4.1 | 24 Oct 2026 | from $951 | Search 24 Oct 2026 | |
| with a stop | — | 7 Dec 2026 | from $985 | Search 7 Dec 2026 | |
| with a stop | ★★★★★ 4.2 | 7 Dec 2026 | from $993 | Search 7 Dec 2026 | |
| with a stop | ★★★★★ 4.5 | 7 Dec 2026 | from $998 | Search 7 Dec 2026 | |
| with a stop | — | 7 Dec 2026 | from $1,000 | Search 7 Dec 2026 | |
| with a stop | ★★★★★ 4.4 | 7 Dec 2026 | from $1,000 | Search 7 Dec 2026 | |
| with a stop | ★★★★★ 4.7 | 7 Dec 2026 | from $1,003 | Search 7 Dec 2026 | |
| with a stop | ★★★★★ 3.6 | 24 Oct 2026 | from $1,013 | Search 24 Oct 2026 |
Source: fares found by Tickets Travel Network search engines, snapshot of 20 September 2026. Prices are converted to USD at an approximate rate; the exact price is shown on the booking site.
Price by month
Lowest fare found for each month in recent searches. Cheapest month: October — from $649.
| Month | Price from | Date | |
|---|---|---|---|
| September 2026 | from $682 | 29 Sept 2026 | |
| October 2026 | from $649 | 6 Oct 2026 | |
| November 2026 | from $737 | 18 Nov 2026 | |
| December 2026 | from $882 | 7 Dec 2026 | |
| January 2027 | from $1,271 | 1 Jan 2027 | |
| February 2027 | from $806 | 13 Feb 2027 | |
| March 2027 | from $1,057 | 6 Mar 2027 | |
| April 2027 | from $896 | 28 Apr 2027 | |
| May 2027 | from $789 | 31 May 2027 | |
| June 2027 | from $782 | 1 Jun 2027 | |
| July 2027 | from $1,098 | 10 Jul 2027 |
Airports on this route
Distances are straight-line from the city centre
| City | Airport | To centre |
|---|---|---|
| London | London City LCY | 13 km |
| London | Gatwick LGW | 40 km |
| London | Heathrow LHR | 24 km |
| London | Luton LTN | 44 km |
| London | Stansted STN | 49 km |
| Koh Samui | Koh Samui USM | 9 km |
Route on the map
When to fly
Fares for this route are listed month by month, and October comes out cheapest. Prices are shown for September through July, so you can watch how far the fare drifts before you fix a date. UK school holidays and the end-of-year break are when seats go first, so if your dates are locked, book further ahead. Midweek departures usually cost less than Friday or Sunday ones. If you have any flexibility, aim for October or the quieter weeks around it.
Airlines and what to expect
Every carrier flying London to Koh Samui is full-service, so there is no low-cost option to fall back on and no hand-baggage-only fare to hunt for. Gulf Air, Qatar Airways and Turkish Airlines connect through their home hubs; Air France, Swiss, LOT Polish Airlines and Edelweiss Air route you through Europe; Cathay Pacific, Eva Air and China Eastern Airlines come at it from Asia. Baggage, meals and seat selection are normally part of the ticket, but allowances differ by carrier and fare family, so read the fare rules instead of assuming. Layover length is the other big difference — a short change in a Gulf hub feels nothing like a long overnight wait.
Arriving — Koh Samui
Koh Samui is served by a single airport, also called Koh Samui, so there is no choice to make on arrival — every flight lands in the same place. It sits on the island itself rather than on the mainland, which means no ferry or long coach leg at the end of an already long journey, and transfers to the main resort areas are short. Taxis and hotel pickups meet arrivals; agree the fare before you get in or arrange the transfer with your hotel. Check the airport code on your ticket as well as the city, since a trip with several changes is easy to misread.
Before you go: Thailand
- Currency
- THB (฿)
- Power sockets
- Type A, B, C, F · 220 V
- Language
- Thai
- Emergency number
- 191, 199, 1669
- Calling code
- +66
- Internet domain
- .th
- Population of Koh Samui
- 63 k (2012)
- Time zone
- UTC+07 (Asia/Bangkok)
Country facts: Wikidata
Check before you book
- Check which London airport you leave from — Heathrow, Gatwick, Stansted, Luton and London City all serve this route.
- Look at the length of each layover, since an overnight stop can cost more in time and hotel than it saves.
- Read the baggage allowance on every leg, as rules can differ between the airline selling the ticket and the one flying it.
- Check your passport and Thai entry requirements well before you fly.
- Buy the whole trip on one ticket so a missed connection is the airline's problem, not yours.
- Book early for UK school holidays, and stay flexible if you want October fares.
Frequently asked questions
London – Koh Samui: when is it cheapest to fly?
The lowest price in recent searches was found for October 2026 — $649. Prices change daily; check the live price in the search.
London – Koh Samui: which airlines fly this route?
Airlines with offers on this route: Gulf Air, Qatar Airways, LOT Polish Airlines, Eva Air, Air France, Cathay Pacific, Edelweiss Air, Swiss, Turkish Airlines, China Eastern Airlines.
London – Koh Samui: are there direct flights?
Only connecting flights were available in recent searches.
How long is the flight from London to Koh Samui?
The distance is about 9,872 km, so a non-stop flight takes roughly 12 h 29 min. Only connecting flights were found recently; a stop adds a few hours.
Which airports serve London – Koh Samui?
London: London City (LCY), Gatwick (LGW), Heathrow (LHR), Luton (LTN), Stansted (STN). Koh Samui: Koh Samui (USM).
What is the time difference between London and Koh Samui?
Koh Samui is 6 h ahead of London.
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