Flights from London Heathrow to Koh Samui with Swiss International Air Lines

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
08/12/25
2 Stopovers (ZRH, SIN)
LX0345, LX0176, LX4171
32h 05min
Return
24/12/25
2 Stopovers (BKK, VIE)
OS8656, OS0008, OS0335
24h 45min
Swiss International Air Lines
£750
London Heathrow
Koh Samui
Outbound
08/12/25
2 Stopovers (ZRH, SIN)
LX0345, LX0176, LX4171
32h 05min
Return
24/12/25
2 Stopovers (BKK, VIE)
OS8652, OS0008, OS0335
24h 35min
Swiss International Air Lines ?
£848
London Heathrow
Koh Samui
Outbound
09/12/25
2 Stopovers (ZRH, BKK)
LX0333, LX0180, LX4174
18h 05min
Return
24/12/25
2 Stopovers (BKK, ZRH)
LX4179, LX0181, LX0340
19h 20min
Swiss International Air Lines ?
£870
London Heathrow
Koh Samui
Outbound
08/12/25
3 Stopovers (ZRH, VIE, SIN)
LX0345, LX3554, TR0711, TR0640
43h 00min
Return
24/12/25
3 Stopovers (SIN, KUL, DXB)
TR0641, TR0468, EK0347, EK0029
59h 55min
Swiss International Air Lines, Scoot ?
£921
London Heathrow
Koh Samui
Outbound
10/12/25
2 Stopovers (ZRH, HKT)
LX0333, LX8050, LX4159
17h 05min
Return
01/01/26
2 Stopovers (BKK, VIE)
OS8670, OS0006, OS0339
18h 40min
Swiss International Air Lines ?
£1,050
Prices based on recent searches, subject to last-minute changes
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Important flight information

Flight information: London Heathrow - Koh Samui

Outbound and return from 749,30 £
Distance 9907 km
Departure airport Airport London Heathrow (LHR)
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