Thai Airways flights from London to Ko Samui (LON - USM)

LON — USM
14 Apr — 21 Apr1
1 adult
1 adult, Economy, 0 bags

Cheapflights users flying from London to Ko Samui on Thai Airways typically fly into Ko Samui and depart from London Heathrow. Select your dates above for pricing.

Thai Airways flights from London to Ko Samui in 2026

Find detailed information about Thai Airways flights from London to Ko Samui. Explore the options provided by Thai Airways to plan your journey from London to Ko Samui. Data last updated 15 March 2026.

One-way from

£931

Return from

£976

Popular in

December

Cheapest in

May

Average price (all airlines)

£913
Thai Airways
  • Thai Airways
  • 4/8
  • 1 total stop
  • 14h 05m total
  • London to Ko Samui
Thai Airways
  • Thai Airways
  • 3/6-27/6
  • 2 total stops
  • 34h 30m total
  • London to Ko Samui
Highest demand for flights from London to Ko Samui; 7% potential price increase.
Best time to find cheap flights from London to Ko Samui; 4% potential price drop.
Average price for all London to Ko Samui flights (one-way and round-trip).

Find Thai Airways flight deals from London to Ko Samui

Enter your travel dates to find the best prices.

Cheapest Thai Airways flights from London to Ko Samui
Explore the most affordable Thai Airways flight options available from London to Ko Samui. Find the lowest fares with prices last updated on 15 March 2026.

Wed 1/412:30
LHR
-
USM
1 stop14h 05m
Thai Airways
Thu 30/408:10
USM
-
LHR
1 stop17h 05m
Thai Airways
Deal found 12/3£1,863
Tue 17/321:35
LHR
-
USM
1 stop16h 45m
Thai Airways
Thu 26/319:35
USM
-
LHR
1 stop18h 05m
Thai Airways
Deal found 11/3£1,867
Mon 30/312:30
LHR
-
USM
1 stop14h 05m
Thai Airways
Sun 26/421:00
USM
-
LHR
1 stop28h 15m
Thai Airways
Deal found 14/3£1,916

How far ahead should I book a flight from London to Ko Samui with Thai Airways?

Use this chart to determine the optimal time to book a return flight from London to Ko Samui. Price data was last updated on 13 March 2026.

Booking with Thai Airways 71 days in advance of your planned departure date is, on average, the best time to get cheap flights from London to Ko Samui. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

What is the cheapest month to book a flight from London to Ko Samui with Thai Airways?

Currently, the most affordable month to book a Thai Airways flight from London to Ko Samui in January, with an average price of £698. Conversely, traveling with Thai Airways from London to Ko Samui in December will be the most expensive, with an average cost of £950. Various factors influence flight prices, so comparing airlines, departure airports, and times can help reduce costs.

Rainfall in Ko Samui by month

Plan your trip to Ko Samui by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Ko Samui ranges from 58.0 - 490.0 inches per month. November is typically the wettest month, when rainfall can reach 490.0 mm. February is typically the driest time to visit Ko Samui when rainfall is around 58.0 mm.

Temperature in Ko Samui by month

Plan your trip to Ko Samui by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Ko Samui, use this chart to help with planning. For those seeking warmer temperatures, April is the ideal time of year to visit, when temperatures reach an average of 29.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 27.0 C).

Best time to book a flight from London to Ko Samui

Have a flexible travel schedule? Discover the best time to fly to Ko Samui from London with our price prediction graph.
Estimated return price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

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Fly from London to Ko Samui on another airline

Consider alternative airlines that service the Ko Samui area. Flight routes are based on user searches made on Cheapflights and were last updated on 15 March 2026.

See what others are saying about Thai Airways

Read reviews and see what other travellers are saying about their experiences with Thai Airways. Get insights from real passengers regarding the airline's services, customer satisfaction, and overall travel experience. Use these reviews to inform your decision when choosing Thai Airways for your next flight. Reviews last updated 15 March 2026.
Thai Airways
7.8
Good
392 reviews
Overview

Comfort

7.6

Entertainment

6.8

Food

7.4

Boarding

7.9

Crew

8.4

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