£370 Find Cheap Flights from London Heathrow Airport to Ko Samui – Compare and Save

Three cabin classes are available on flights from London Heathrow Airport to Ko Samui:

• Economy class
• Premium Economy Class
• Business Class

A direct flight from London Heathrow Airport to Ko Samui takes 0h 00m, covering 6,144 miles.

Yes, a valid passport is required for this international route. Many destinations require at least six months of validity beyond your travel dates. Check your passport expiry well before booking.

Return flights from London Heathrow Airport to Ko Samui range from £838 to £1,184, with an average of £968 over the past 12 months. Anything below £838 counts as a good deal.

Last-minute fares on this route (booked within 2 weeks of departure) run 5% above the route average of £968. Book 13 weeks before departure for the lowest fares.

British Airways is the only airline operating London Heathrow Airport to Ko Samui flights. 79% of its flights are on time.

One-way fares from London Heathrow Airport to Ko Samui are currently lower than usual. Average one-way flight prices are about £584, which is 6% below the typical average for this route.

Ko Samui Airport (USM) hosts 5 major car hire companies, with daily rates starting from around £10 for economy cars. Top options include:
• Drive Car Rental
• Alamo
• Sixt
• Enterprise Rent-A-Car
• Hertz

Flights from London Heathrow Airport to Ko Samui usually depart from London Heathrow (LHR) and arrive at Ko Samui (USM).

Afternoon flights have the fewest delays on this route. Delays tend to pile up throughout the day as one late flight pushes the next, so earlier departures are usually more reliable.

A flight is considered delayed when it departs 15 minutes or more after its scheduled time. This is the standard used by the US Department of Transportation and most airline industry reporting. On the London Heathrow Airport to Ko Samui route, 21% of flights were delayed in the past 3 months, with delays averaging 2 hours 12 minutes.

One-stop flights from London Heathrow Airport to Ko Samui most commonly connect through:

• Bangkok Suvarnabhumi (BKK) – 82% of one-stop connections
• Singapore Changi (SIN) – 16% of one-stop connections
• Hong Kong Intl (HKG) – 1% of one-stop connections

Bangkok Suvarnabhumi (BKK) handles the largest share of one-stop connections on this route.

Yes. Being flexible with your travel dates can save you up to 12% on the London Heathrow Airport to Ko Samui route. Monday is the cheapest departure day at £905 return on average, while Friday is the most expensive at £1,019, a difference of £113. KAYAK's flexible dates feature shows options up to 3 days before and after your selected dates, making it easier to compare nearby fares.

Flying via Bangkok Suvarnabhumi (BKK) gives the shortest average 1-stop total travel time of 16h 12m, compared to 18h 21m via Singapore Changi (SIN) and 22h 34m via Hong Kong Intl (HKG).

Ko Samui is 6 hours ahead of London Heathrow Airport (Indochina Time vs British Time). Plan for the time shift when scheduling connections or first-day activities.

Some of the most popular sights in Ko Samui are Lamai Beach, Chaweng Beach, and Bophut Beach. These are among the most viewed places in Ko Samui on KAYAK.

London Heathrow’s central bus station operates 24h, and it is a few minutes’ walk from Terminal 2 and 3. National Express and Megabus operate buses from various destinations in the city to the airport. Several car rental services, including Hertz, Europcar, SIXT, and Budget, have pickup points across London city. Piccadilly Line trains, rideshare cabs, the Heathrow Express train are alternative transfer options from downtown London to Heathrow.

There are no designated smoking zones past the security area. Passengers in transit aren’t permitted to smoke during the connection process. Smoking areas are located outside the terminal, so you will have to pass through security control before being allowed into the departure lounge.

There are numerous lounges at London Heathrow, including Plaza Premium Lounge in Terminal 2 and Club Aspire in Terminal 3. Terminal 4 users will have access to Sky Lounge, while Terminal 5 users can take advantage of Aspire Lounge & Spa.

There are lounges for arriving passengers at Koh Samui Airport, irrespective of their airline. You can access a lounge through a membership program or purchase a lounge pass or pay at the door. Blue Ribbon Club Lounge is available at all terminals, and its services include restrooms, reading areas, magazines and newspapers, beverages, foods, and Thai massage.

Taxis from the airport to the city centre are readily available in the ground transportation area. Ride-share and private minivans are a cheaper alternative transfer option to Chaweng Beach. A taxi ride to Chewang Beach from the airport takes around 9min, and it costs approximately ฿120 (£3).

Flights from London Heathrow to Samui Airport stops at least twice at Zurich and Bangkok before the plane touches down at Samui Airport. You may also fly to Samui Airport from Heathrow through Vienna and Bangkok, but your flight will be a little longer.