Flights from London to Koh Samui from $706

Compare All LON to USM Flights

Prices are per person for one-way travel. Click “Book” to complete your reservation on the partner site.

1 of 1 flight

Airline	Schedule	Stops	Duration	Price
CA CA · 852	12:35 LON 14:55 USM	0 stop(s)	74h 20m	$706 Best	Book →

Airport Information

Key details about departure and arrival airports for this route

USM

Samui International Airport

City: Na Thon (Ko Samui Island)
Country: TH
Type: Large Airport
Elevation: 64 ft

USM Airport Guide →

Tips for London to Koh Samui Flights

Save money and travel smarter with these route-specific tips

📅 When to Book

Book LON–USM flights 6–8 weeks in advance for the best prices. Last-minute fares are typically 40–60% more expensive on this route.

💰 Price Trends

The average fare is $706, but prices as low as $706 are available.

✈ Direct vs Connecting

No direct flights currently listed. Consider flexible dates or nearby airports for better connections.

📍 Flexible Dates

Flying midweek (Tuesday–Thursday) on LON–USM is typically 15–30% cheaper. Use our price comparison to spot the best day to fly.

Top Hotels in Koh Samui

Book accommodation at your destination — top-rated stays near USM airport

Glory Moon Resort

Koh Samui, 4★

10.0 Check Price

Pano Samui Beachfront Villa 3

Koh Samui

10.0 Check Price

2BR Emerald Villa – Private Pool & Sea View B30-1

Koh Samui

10.0 Check Price

Bleu Oasis House - 2BR - Smart TV

Koh Samui

10.0 Check Price

Cozy Boutique Bungalow No. 2

Frequently Asked Questions

Everything you need to know about flying LON to USM

What is the cheapest flight from London to Koh Samui?

The cheapest flight from London (LON) to Koh Samui (USM) currently starts at $706 with CA. Prices are updated regularly and may vary by date and availability.

How many airlines fly from LON to USM?

We found 1 airline(s) operating on the LON–USM route, including CA.

Are there direct flights from London to Koh Samui?

No direct flights are currently listed on this route. All available options involve at least one stop. Consider flexible dates or nearby airports for better connection options.

What is the average flight price on this route?

The average flight price from London to Koh Samui is approximately $706. Prices range from $706 to $706 depending on airline, time, and class.

How long is the flight from LON to USM?

The average flight duration from London to Koh Samui is approximately 74 hours 20 minutes. Direct flights are typically shorter than connecting options.

What is the baggage allowance on LON–USM flights?

Baggage allowance varies by airline and fare class. Most economy fares on this route include 1 carry-on (7–8 kg) and 1 checked bag (20–23 kg). Always confirm baggage rules on the airline's site at booking — low-cost carriers may charge for checked bags.