Cheap Flights from London Heathrow to Sihanoukville

Compare London Heathrow to Sihanoukville flight deals

Find the cheapest month or even day of the year to fly to Sihanoukville

Book the best Sihanoukville fare with no extra fees

Flight deals from London Heathrow to Sihanoukville

Looking for a cheap last-minute deal or the best return flight from London Heathrow to Sihanoukville? Find the lowest prices on one-way and return tickets right here.

Find the cheapest month to fly from London Heathrow to Sihanoukville

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like London Heathrow to Sihanoukville flights are currently cheapest in March.

London Heathrow to Sihanoukville: Alternative routes

Compare routes from London Heathrow to Sihanoukville below. You may find an airport to fly into that's cheaper, faster, or easier than Sihanoukville.

London to Sihanoukville: Flight information

The things to know before you go.
Cheapest flight foundRs125,011
Cheapest month to flyMarch

Finding cheap flights from London Heathrow to Sihanoukville: Frequently asked questions

The best price we found for a return flight from London Heathrow to Sihanoukville is Rs255,827. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.
Currently, there are no airlines that fly direct from London Heathrow to Sihanoukville. But we found flights with one or more stops from Rs255,827.
As of February 2026, there are no flights flying from London Heathrow to Sihanoukville.
The cheapest month to fly from London Heathrow to Sihanoukville is usually April.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from London Heathrow Airport to Sihanoukville Airport on Tuesday, 28 April 2026.
No airlines currently offer direct flights between London Heathrow Airport and Sihanoukville Airport. Most routes have one or more stops.
We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to Sihanoukville but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.
We crunched all the numbers in our flight calendar and it looks like the cheapest time to book a flight to Sihanoukville is around 40 days in advance, so don’t leave your flight to the last minute.
Currently, Aegean Airlines offers the cheapest flight tickets to Sihanoukville.

Travelling from London Heathrow Airport (LHR) to Sihanouk International Airport (KOS): what you need to know

  • The timezone in Sihanoukville is UTC+7, which is seven hours ahead of London.

  • Your LHR to KOS flight won't wait if you're running late, so be at the airport on time. Arrive up to one hour in advance for domestic flights and two hours ahead when you're travelling internationally.

  • During popular months such as July, it's a good idea to get to the airport well in advance. Plan to arrive two hours before domestic departures and four hours ahead of international flights when you fly during a high season in general.

  • Pick a stopover if you'd love to break up your flight. Just deselect 'Direct flights only' to see the options for tickets from London Heathrow Airport to Sihanouk International Airport. Kuala Lumpur International Airport is a popular stopover on the LHR to KOS route.

How to find the cheapest flights from London Heathrow Airport (LHR) to Sihanouk International Airport (KOS)

  • Right now, Rs125,011 is the cheapest price we've seen for a one-way London Heathrow Airport to Sihanouk International Airport flight. The best price for a return plane ticket is Rs255,827. Remember that fares can change due to demand at the time of booking.

  • It's often best to book ahead of time if you're hoping to get cheap tickets from LHR to KOS. That's because flight prices are based on demand, which tends to rise closer to the date of departure.

  • Getting cheap flights from London Heathrow Airport to Sihanouk International Airport is easy if you can be flexible with your travel plans. Use the 'Whole month' search tool to see the best prices throughout the month and land a great deal.

  • Landing cheap flights from LHR to KOS is a cinch with Price Alerts. All you need to do is set up one of these automatic alerts and we'll let you know when fares go down.

  • Tailor your flights using filters. Pick your arrival and departure times, airlines and total journey duration. You can also sort results by 'Cheapest,' 'Best' or 'Fastest' flights from London Heathrow Airport to Sihanouk International Airport.

Handy information about London Heathrow Airport (LHR)

  • When it comes to the on-time performance of London Heathrow Airport, data shows 68.18% of flights stick to their scheduled arrival time.

  • London Heathrow Airport is about 31 kilometres from central London. If you're ride-sharing, catching a cab or driving from the centre, it'll take 55 minutes or so to get there, depending on the traffic.

  • The journey on public transport takes about 1 hour.

  • Have an early flight from London Heathrow Airport to Sihanouk International Airport? Avoid the stress of rushing to the terminal (and sneak in some extra snooze time) by picking one of these hotels near LHR:

Arriving at Sihanouk International Airport (KOS)

  • Consider a stay at Sok Sabay Resort after arriving from your London Heathrow Airport to Sihanouk International Airport flight. It's a quick drive from KOS and a comfy option if you're eager to get some rest right away.

Getting from Sihanouk International Airport (KOS) to central Sihanoukville

  • From Sihanouk International Airport, Sihanoukville is approximately 24 kilometres away. It takes around 45 minutes to reach the centre driving.

When to fly to Sihanouk International Airport (KOS)

  • The quietest month for a flight from London Heathrow Airport to Sihanouk International Airport is April, while January is the busiest. Choose the ideal time to visit Sihanoukville based on whether you prefer a bustling atmosphere or a more laid-back vibe.

  • Before locking in your flight from London Heathrow Airport to Sihanouk International Airport, consider the type of weather you like. May is the warmest month in Sihanoukville, with the temperature ranging from 25ºC to 31ºC.

  • Look for cheap tickets from LHR to KOS in January if you want to travel in cooler conditions. Temperatures are at their lowest around then, ranging between 23ºC and 29ºC on average.

Explore more of Cambodia

  • Sihanoukville has loads to offer, but there are so many other corners of Cambodia waiting to be discovered. Around 193 kilometres north-east of Sihanoukville, a visit to Phnom Penh will keep your itinerary packed. Start with popular sights like Royal Palace, Tuol Sleng Genocide Museum and Wat Phnom.

  • If you're ready to explore another major destination in Cambodia, head for Battambang, roughly 274 kilometres north of Sihanoukville. The Garden of SamDech Sar Kheng, Spean Thmor Chas and សួននាគសន្តិភាព-Dragon Peace Garden are among the biggest draws.

Prices shown on this page are estimated lowest prices only. Found in the last 45 days.