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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 monthFebruary
Airlines10
Direct flightswith a stop
Distance9,872 km
Direct flight time *12 h 29 min
Updated 4 Nov 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
Air BalticAir BalticBTwith a stop★★★★★ 3.724 Nov 2026from $691Search 24 Nov 2026
Qatar AirwaysQatar AirwaysQRwith a stop★★★★★ 4.79 Nov 2026from $824Search 9 Nov 2026
Air IndiaAir IndiaAIwith a stop★★★★★ 3.915 Jan 2027from $834Search 15 Jan 2027
Gulf AirGulf AirGFwith a stop★★★★★ 4.59 Nov 2026from $838Search 9 Nov 2026
Etihad AirwaysEtihad AirwaysEYwith a stop★★★★★ 4.69 Nov 2026from $959Search 9 Nov 2026
Thai Airways IntlThai Airways IntlTGwith a stop★★★★★ 4.49 Nov 2026from $1,026Search 9 Nov 2026
EmiratesEmiratesEKwith a stop★★★★★ 4.75 Nov 2026from $1,026Search 5 Nov 2026
Cathay PacificCathay PacificCXwith a stop★★★★★ 4.55 Nov 2026from $1,033Search 5 Nov 2026
SwissSwissLXwith a stop★★★★★ 4.49 Nov 2026from $1,078Search 9 Nov 2026
FinnairFinnairAYwith a stop★★★★★ 4.49 Nov 2026from $1,111Search 9 Nov 2026

Source: fares found by Tickets Travel Network search engines, snapshot of 4 November 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: February — from $766.

MonthPrice fromDate
November 2026from $8249 Nov 2026
December 2026from $1,68021 Dec 2026
January 2027from $95113 Jan 2027
February 2027from $76618 Feb 2027
March 2027from $1,60020 Mar 2027
April 2027from $76920 Apr 2027
May 2027from $1,25417 May 2027
June 2027from $7771 Jun 2027
July 2027from $9171 Jul 2027
August 2027from $99922 Aug 2027
September 2027from $7916 Sept 2027

Search February 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 February 2027 — $766. Prices change daily; check the live price in the search.

London – Koh Samui: which airlines fly this route?

Airlines with offers on this route: Air Baltic, Qatar Airways, Air India, Gulf Air, Etihad Airways, Thai Airways Intl, Emirates, Cathay Pacific, Swiss, Finnair.

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 7 h ahead of London.

London — more routes

ToAirlineFlightDatePrice from
MadridRyanairdirect5 Dec 2026from $22
LublinRyanairdirect8 Nov 2026from $26
BudapestRyanairdirect8 Jan 2027from $30
KrakowRyanairdirect24 Nov 2026from $34
ParisEasyjetdirect10 Dec 2026from $38
RzeszowRyanairdirect12 Nov 2026from $43
ChisinauWizz Air UKdirect18 Jan 2027from $45
KosiceRyanairdirect12 Nov 2026from $46
WarsawWizz Airdirect1 Dec 2026from $58
SuceavaWizz Air Maltadirect25 Nov 2026from $60

London: flights from the city

Koh Samui — flights from other cities

FromAirlineFlightDatePrice from
WarsawNordic Regional Airlineswith a stop4 Dec 2026from $941
KrakowKLM Royal Dutch Airlineswith a stop11 Feb 2027from $970

Nearby alternatives

Airports within reach of London / Koh Samui that also have this destination — sometimes far cheaper

RouteDistanceFlightDatePrice from
London → Krabi199 km from Koh Samuiwith a stop16 Nov 2026from $615
Search on kissandfly.com · $691