Flight Routes from London Heathrow to Koh Samui

Trip type

Our cheapest offers for flights from London Heathrow to Koh Samui

Here you can compare cheap flights from London Heathrow (LHR) 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
London Heathrow
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 Heathrow
Koh Samui
Outbound
15/07/26
2 Stopovers (MCT, BKK)
WY0102, WY0815, PG0193
18h 45min
Return
31/07/26
2 Stopovers (BKK, MCT)
PG0148, WY0816, WY0103
20h 40min
Oman Air, Bangkok Airways
£1,048
London Heathrow
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
Best option
London Heathrow
Koh Samui
Outbound
15/07/26
1 Stopover (HKG)
CX0250, CX6503
19h 20min
Return
31/07/26
1 Stopover (HKG)
CX6502, CX0251
23h 45min
Cathay Pacific Airways ?
£1,851
London Heathrow
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
London Heathrow
Koh Samui
Outbound
15/07/26
2 Stopovers (MCT, BKK)
WY0102, WY0815, PG0193
18h 45min
Return
31/07/26
2 Stopovers (BKK, MCT)
PG0148, WY0816, WY0103
20h 40min
Oman Air, Bangkok Airways
£1,052
London Heathrow
Koh Samui
Outbound
15/07/26
2 Stopovers (MCT, BKK)
WY0102, WY0815, PG0193
18h 45min
Return
31/07/26
2 Stopovers (BKK, MCT)
PG0148, WY0816, WY0103
20h 40min
Oman Air, Bangkok Airways
£1,053
London Heathrow
Koh Samui
Outbound
15/07/26
2 Stopovers (MCT, BKK)
WY0102, WY0815, WY5859
17h 40min
Return
31/07/26
2 Stopovers (BKK, MCT)
WY5868, WY0816, WY0103
27h 45min
Oman Air
£1,056
London Heathrow
Koh Samui
Outbound
15/07/26
2 Stopovers (MCT, BKK)
WY0102, WY0815, PG0193
18h 45min
Return
31/07/26
2 Stopovers (BKK, MCT)
PG0186, WY0816, WY0103
39h 55min
Oman Air, Bangkok Airways
£1,102
London Heathrow
Koh Samui
Outbound
15/07/26
2 Stopovers (DOH, HKT)
QR0004, QR0846, QR4408
37h 25min
Return
31/07/26
2 Stopovers (SIN, DOH)
QR4436, QR0947, QR0011
22h 55min
Qatar Airways
£1,110
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 Heathrow 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
When booking flights from London Heathrow to Koh Samui 36 % of travellers prefer to fly via Abu Dhabi and Bangkok.
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

Frequently Asked Questions (FAQ)

Flight information: London Heathrow - Koh Samui

Outbound and return from £ 971,49
Distance 9907 km
Departure airport Airport London Heathrow (LHR)
Arrival airport Airport Koh Samui (USM)
Destination country Flights to Thailand
City-Code - Arrival airport London - Koh Samui
Departure airport - Destination country London Heathrow - Thailand
Alternative routes to Thailand
Alternative flights to Koh Samui
Popular destinations for onward travel
Flight destinations with a similar price