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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.

Cheapest monthOctober
Airlines10
Direct flightswith a stop
Distance9,872 km
Direct flight time *12 h 29 min
Updated 20 Sept 2026

Search opens on kissandfly.com — that’s where you buy the ticket.

Prices found on this route

Lowest fare found per airline in recent searches — click to search that date on kissandfly.com

AirlineFlightRatingDatePrice fromSearch
Gulf AirGulf AirGFwith a stop 4.57 Dec 2026from $882Search 7 Dec 2026
Qatar AirwaysQatar AirwaysQRwith a stop 4.77 Dec 2026from $933Search 7 Dec 2026
LOT Polish AirlinesLOT Polish AirlinesLOwith a stop 4.124 Oct 2026from $951Search 24 Oct 2026
Eva AirEva AirBRwith a stop7 Dec 2026from $985Search 7 Dec 2026
Air FranceAir FranceAFwith a stop 4.27 Dec 2026from $993Search 7 Dec 2026
Cathay PacificCathay PacificCXwith a stop 4.57 Dec 2026from $998Search 7 Dec 2026
Edelweiss AirEdelweiss AirWKwith a stop7 Dec 2026from $1,000Search 7 Dec 2026
SwissSwissLXwith a stop 4.47 Dec 2026from $1,000Search 7 Dec 2026
Turkish AirlinesTurkish AirlinesTKwith a stop 4.77 Dec 2026from $1,003Search 7 Dec 2026
China Eastern AirlinesChina Eastern AirlinesMUwith a stop 3.624 Oct 2026from $1,013Search 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.

MonthPrice fromDate
September 2026from $68229 Sept 2026
October 2026from $6496 Oct 2026
November 2026from $73718 Nov 2026
December 2026from $8827 Dec 2026
January 2027from $1,2711 Jan 2027
February 2027from $80613 Feb 2027
March 2027from $1,0576 Mar 2027
April 2027from $89628 Apr 2027
May 2027from $78931 May 2027
June 2027from $7821 Jun 2027
July 2027from $1,09810 Jul 2027

Search October on kissandfly.com

Airports on this route

Distances are straight-line from the city centre

CityAirportTo centre
LondonLondon City LCY13 km
LondonGatwick LGW40 km
LondonHeathrow LHR24 km
LondonLuton LTN44 km
LondonStansted STN49 km
Koh SamuiKoh Samui USM9 km

Route on the map

LondonKoh Samui9,872 km
London – Koh Samui: 9,872 km in a straight line; Thailand is highlighted. Land outlines: Natural Earth.

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.

London — more routes

ToAirlineFlightDatePrice from
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RzeszowRyanairdirect12 Nov 2026from $28
MadridEasyjetdirect19 Nov 2026from $29
ParisEasyjetdirect13 Oct 2026from $36
SuceavaWizz Air Maltadirect5 Oct 2026from $39
ChisinauWizz Air UKdirect10 Dec 2026from $46

London: flights from the city

Koh Samui — flights from other cities

FromFlightDatePrice from
Warsawwith a stop21 Nov 2026from $646
Search on kissandfly.com · $882