Flight Routes from London to Koh Samui

Trip type

Our cheapest offers for flights from London to Koh Samui

Here you can compare cheap flights from London (LON) to Koh Samui (USM) for one-way or return trips. The following offers were searched for and found on idealo during the last few days. Or start your own flight search to Koh Samui. Prices and availability may change at any time.

Outbound Return Airlines Shop Baggage Price
Best option
London
Koh Samui
Outbound
17/08/26
2 Stopovers (RUH, BKK)
SV0122, SV0846, PG0167
18h 50min
Return
15/09/26
2 Stopovers (BKK, RUH)
PG0124, SV0847, SV0111
27h 25min
Saudi Arabian Airlines, Bangkok Airways
£735
London
Koh Samui
Please note: transfer for connecting flight
Outbound
15/07/26
1 Stopover (HKG)
CX0238, PG0806
20h 40min
Return
31/07/26
1 Stopover (HKG)
PG0807, CX0255
24h 25min
Cathay Pacific Airways, Bangkok Airways
£1,767
London
Koh Samui
Outbound
20/08/26
2 Stopovers (MUC, BKK)
LH2479, LH0772, LH4628
16h 45min
Return
16/09/26
2 Stopovers (BKK, VIE)
OS8674, OS0008, OS0331
17h 45min
Lufthansa ?
£812
London
Koh Samui
Outbound
17/08/26
2 Stopovers (DOH, BKK)
QR0010, QR0830, PG0129
18h 15min
Return
15/09/26
2 Stopovers (HKT, DOH)
QR4363, QR0847, QR0011
24h 15min
Qatar Airways, Bangkok Airways
£834
London
Koh Samui
Outbound
17/08/26
2 Stopovers (ZRH, SIN)
LX0339, LX0176, LX4171
43h 05min
Return
15/09/26
2 Stopovers (BKK, ZRH)
LX4179, LX0181, LX0316
28h 40min
Swiss International Air Lines ?
£899
London
Koh Samui
Outbound
17/08/26
2 Stopovers (MUC, BKK)
LH2479, LH0772, LH4628
16h 45min
Return
15/09/26
2 Stopovers (BKK, ZRH)
LX4179, LX0181, LX0316
28h 40min
Lufthansa
£916
London
Koh Samui
Outbound
17/08/26
2 Stopovers (DEL, BKK)
AI0112, AI2332, PG0123
38h 05min
Return
15/09/26
2 Stopovers (BKK, IST)
PG0100, TK0059, TK1971
40h 40min
Air India, Bangkok Airways ?
£936
London
Koh Samui
Outbound
20/08/26
2 Stopovers (VIE, BKK)
OS0338, OS0007, OS8663
16h 15min
Return
16/09/26
2 Stopovers (BKK, VIE)
OS8694, OS0008, OS0331
18h 25min
Austrian Airlines ?
£948
London
Koh Samui
Outbound
15/07/26
2 Stopovers (MCT, BKK)
WY0102, WY0817, WY5828
31h 55min
Return
31/07/26
2 Stopovers (BKK, MCT)
WY5868, WY0816, WY0103
27h 45min
Oman Air ?
£972
London
Koh Samui
Outbound
15/07/26
2 Stopovers (MCT, BKK)
WY0102, WY0817, WY5828
31h 55min
Return
31/07/26
2 Stopovers (BKK, MCT)
WY5868, WY0816, WY0103
27h 45min
Oman Air ?
£999
Prices based on recent searches, subject to last-minute changes
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Tips and tricks to help you find cheap flights from London to Koh Samui

Favourite airline: Etihad Airways
61 % of bookings on this flight route are made with Etihad Airways, EVA Airways and Emirates.
Etihad Airways
29 %
EVA Airways
16 %
Emirates
16 %
Favourite connection: via Abu Dhabi and Bangkok
The most popular flights on this route are via Abu Dhabi and Bangkok and are booked by 36 % of all travellers.
Route
bookings
2 stopovers Abu Dhabi Bangkok Suvarnabhumi
27h 25min, from 918 £
36 %
1 stopover Bangkok Suvarnabhumi
18h 00min, from 1 005 £
26 %
2 stopovers Dubai Bangkok Suvarnabhumi
31h 25min, from 1 191 £
14 %

Important flight information

Flight information: London - Koh Samui

Outbound and return from 734,59 £
Distance 9886 km
Departure airport Airport London (LCY, LGW, LHR, LTN, STN, SEN) (LON)
Arrival airport Airport Koh Samui (USM)
Destination country Flights to Thailand
Alternative routes to Thailand
Alternative flights to Koh Samui
Popular destinations for onward travel
Flight destinations with a similar price