Can I combine different airlines on the same trip?

Of course. We offer you the possibility of booking with more than 400 airlines so that you can find the cheapest fare or the most convenient combination: outbound flight with one airline and return flight with another.

Is lastminute.com a trustworthy travel brand?

In 1998, lastminute.com was one of the first online travel agencies. Currently, we are selling over 380,000 flights per year – and working hard on bringing travellers wherever they want to go.

What options are there if I have to change my flight?

lastminute.com offers flexibility services for purchase at the time of your booking. These services entitle you to change or cancel your flights without handling fee.**Flexibility services are available on selected flights only. Please read our T&Cs for more information.

I am afraid to lose my luggage, every time I fly. What can I do?

lastminute.com offers a range of baggage protection services, so that you are covered in case your luggage is delayed or lost.****Baggage protection services are available on selected flights only. Please read our T&Cs for more information.

How long does a flight take between London and Koh Samui?

The flight from London to Koh Samui has a duration of 17h 52m.

What are the cheapest flights from London to Koh Samui?

The cheapest one-way flight costs £503 flying with Qatar Airways and the cheapest return flight costs £807 with Condor.

How many airports are there in the city of London?

London has 5 airport: LON - All airports, London Heathrow Airport, Gatwick, London Stansted Airport, London City Airport.

How many airports does Koh Samui have?

There are 1 airports in Koh Samui: Samui International Airport

Which Koh Samui airport is the most central?

The most central airport is Samui International Airport, 3.1km.

Schedules of the first and last flight from London to Koh Samui

The first flight from London to Koh Samui is at 08:15 and the last flight departs at 18:15.

Cheap flights from London to Koh Samui

Fly smart, spend less

Flights to Koh Samui from London

Cheap flights from London to Koh Samui from £503. London (United Kingdom) - Koh Samui (Thailand) return flights from £807. From 03/11/2026 (Tuesday) - 05/11/2026 (Thursday). Check for the dates with the lowest prices and find the cheapest rates.

Round-trip flights from London to Koh Samui

Cheapest round-trip flights from London to Koh Samui

09 Nov - 15 Nov • 6 nights
21:20LGW
31h 30m1 stop
11:50USM
British Airways
19:10USM
17h 15m1 stop
05:25LGW
British Airways
from£823
26 Oct - 04 Nov • 9 nights
09:25LHR
19h 30m2 stops
11:55USM
Qatar Airways
21:10USM
22h 5m2 stops
12:15LHR
Qatar Airways
from£845
26 Oct - 04 Nov • 9 nights
09:25LHR
19h 30m2 stops
11:55USM
Qatar Airways
20:30USM
23h 55m2 stops
13:25LHR
Qatar Airways
from£845
26 Oct - 04 Nov • 9 nights
09:25LHR
19h 30m2 stops
11:55USM
Qatar Airways
21:10USM
22h 5m2 stops
12:15LHR
Qatar Airways
from£845
26 Oct - 04 Nov • 9 nights
09:25LHR
19h 30m2 stops
11:55USM
Qatar Airways
20:20USM
22h 55m2 stops
12:15LHR
Qatar Airways
from£845
03 Nov - 09 Nov • 6 nights
09:25LHR
18h 15m2 stops
10:40USM
Qatar Airways
20:30USM
22h 45m2 stops
12:15LHR
Qatar Airways
from£845

Explore all offers

Flights from London to Koh Samui one way

Find one-way flights from London to Koh Samui at great prices.

Explore all offers

Cheap flights from London Heathrow Airport to Koh Samui

Find cheap flights from London Heathrow Airport to Koh Samui now.

Explore all offers

Cheap flights from Gatwick to Koh Samui

Find cheap flights from Gatwick to Koh Samui now.

Explore all offers

Cheap flights from London Stansted Airport to Koh Samui

Find cheap flights from London Stansted Airport to Koh Samui now.

Explore all offers

More information about flights to Koh Samui from London

Information about flights from London to Koh Samui

When you’re looking to get away and not interested in a precise date, take a look at our flight offers this month. Flight deals from London to Koh Samui are great time of year. Be inspired!

Once you have your flight London-Koh Samui booked you can always use lastminute.com to organise the rest of your trip just the way you want it. lastminute.com allows you to book a hotel, car hire, tours and activities in Koh Samui.

lastminute.com cares about its customers and offers more than an online travel booking tool. We support our customers from start to finish and beyond. Helping you plan your trip, to during your holiday and even when you return from your trip .

Welcome to the lastminute.com travel website! You have arrived in the right place if you are looking for a low cost flight London-Koh Samui . Complete the form on the flight search engine correctly, and we are sure to have what you are looking for.

If you are a frequent traveller , download our iPhone and Android app free of charge. It will change your travelling habits and be extremely useful whilst you are away on trips.

FAQs London to Koh Samui flights

FAQs

Can I combine different airlines on the same trip?
Of course. We offer you the possibility of booking with more than 400 airlines so that you can find the cheapest fare or the most convenient combination: outbound flight with one airline and return flight with another.
Is lastminute.com a trustworthy travel brand?
In 1998, lastminute.com was one of the first online travel agencies. Currently, we are selling over 380,000 flights per year – and working hard on bringing travellers wherever they want to go.
What options are there if I have to change my flight?
lastminute.com offers flexibility services for purchase at the time of your booking. These services entitle you to change or cancel your flights without handling fee.*
*Flexibility services are available on selected flights only. Please read our T&Cs for more information.
I am afraid to lose my luggage, every time I fly. What can I do?
lastminute.com offers a range of baggage protection services, so that you are covered in case your luggage is delayed or lost.**
**Baggage protection services are available on selected flights only. Please read our T&Cs for more information.
How long does a flight take between London and Koh Samui?
The flight from London to Koh Samui has a duration of 17h 52m.
What are the cheapest flights from London to Koh Samui?
The cheapest one-way flight costs £503 flying with Qatar Airways and the cheapest return flight costs £807 with Condor.
How many airports are there in the city of London?
London has 5 airport: LON - All airports, London Heathrow Airport, Gatwick, London Stansted Airport, London City Airport.
How many airports does Koh Samui have?
There are 1 airports in Koh Samui: Samui International Airport
Which Koh Samui airport is the most central?
The most central airport is Samui International Airport, 3.1km.
Schedules of the first and last flight from London to Koh Samui
The first flight from London to Koh Samui is at 08:15 and the last flight departs at 18:15.