Cheap Flights from London to Siem Reap–Angkor

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Compare London to Siem Reap–Angkor flight deals

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Flight deals from London to Siem Reap–Angkor

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

Find the cheapest month to fly from London to Siem Reap–Angkor

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like London to Siem Reap–Angkor flights are currently cheapest in May.

London to Siem Reap–Angkor : Alternative routes

Compare routes from London to Siem Reap below. You may find an airport to fly into that's cheaper, faster, or easier than Siem Reap–Angkor .

London to Siem Reap: Flight information

The things to know before you go.
Cheapest flight foundج.م.‏ 18,094
Cheapest month to flyMay

Finding cheap flights from London to Siem Reap–Angkor : Frequently asked questions

The best price we found for a return flight from London to Siem Reap–Angkor is ج.م.‏ 41,010. 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 to Siem Reap–Angkor . But we found flights with one stop from ج.م.‏ 41,010.
As of April 2025, there are no flights flying from London to Siem Reap–Angkor .
The cheapest month to fly from London to Siem Reap–Angkor is usually April 2025.
After crunching the numbers on our flight calendar, we found that it is currently cheapest to fly from London to Siem Reap–Angkor Airport on Saturday, 14 June 2025.
No airlines currently offer direct flights between London and Siem Reap–Angkor 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 Siem Reap–Angkor 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 Siem Reap is around 40 days in advance, so don’t leave your flight to the last minute.
The cheapest airline that flies to Siem Reap–Angkor is Air India .

Travelling from London to Siem Reap-Ankor International Airport (SAI): what you need to know

  • London has multiple airports to fly out of. Check out your departure options from London Heathrow Airport (LHR) and London Gatwick Airport (LGW) when organising your flight from London to Siem Reap-Ankor International Airport (SAI). Stansted Airport (STN), London Luton Airport (LTN) and London City Airport (LCY) are the city's other main bases.

  • Siem Reap is 7 hours ahead of London. Siem Reap-Ankor International Airport is located in Siem Reap, which operates on the UTC+7 timezone.

  • For a smooth journey, arrive at the airport two hours ahead of international flights and an hour before domestic departures. This way, you can comfortably catch your flight from London to SAI.

  • Popular months like July or other peak seasons mean longer waiting times and potential delays. Get a head start by getting to the airport even earlier. Plan for at least four hours ahead of an international flight and two hours before domestic departures.

Airports in London

London Heathrow Airport (LHR)

  • Think about adding a stopover to potentially save on your flight from London to SAI. Simply uncheck 'Direct flights only' when browsing departures from London Heathrow Airport (LHR). Take a pause at one of these popular options:

    • Kuala Lumpur International Airport (KUL)

    • Changi International Airport (SIN)

    • Suvarnabhumi Airport (BKK)

  • From central London, LHR is approximately 31 kilometres away. Visit the official airport website or use navigation apps to work out the best way to reach the terminal.

  • In search of a convenient hotel close to London Heathrow Airport? If you're boarding an early flight from London to Siem Reap-Ankor International Airport, these stays will have you sleeping moments from your check-in counter:

London Gatwick Airport (LGW)

  • Visit friends or family or just take a moment to recharge with a stopover. If you'd like to break up your flight from London to Siem Reap-Ankor International Airport, browse these options when heading out from London Gatwick Airport:

    • Suvarnabhumi Airport (BKK)

    • Kuala Lumpur International Airport (KUL)

    • Changi International Airport (SIN)

  • LGW is about 80 kilometres from central London. It'll take you 1 hour and 19 minutes or so to get to the airport if you're driving from the city centre. Public transport takes roughly 1 hour and 26 minutes.

  • You're going on holiday, so why not extend it with another night away? Consider kicking back in one of these accommodation options near London Gatwick Airport the day before your flight from London to SAI:

About Siem Reap-Ankor International Airport (SAI)

  • Hop off your flight from London to Siem Reap-Ankor International Airport and hop into your hotel bed soon after. If you're searching for a comfortable option a short journey from SAI, head for Chansor Community Homestay 18.

Getting from Siem Reap-Ankor International Airport (SAI) to central Siem Reap

  • Siem Reap-Ankor International Airport to central Siem Reap takes around 59 minutes in a car. It's approximately 48 kilometres away. Discover what options are available, such as cabs, car rentals or ride-sharing services.

How to find the cheapest flights from London to Siem Reap-Ankor International Airport (SAI)

  • Lock in a one-way ticket from London to Siem Reap-Ankor International Airport from ج.م.‏ 18,094 or travel return from just ج.م.‏ 41,010. Fares listed are subject to change and may differ when you make your booking.

  • Don't leave everything to the last minute. You're more likely to find cheap tickets from London to SAI if you book in advance. Airlines often have some fantastic early bird deals.

  • Finding cheap tickets from London to Siem Reap-Ankor International Airport is easier if you can be flexible with your dates. Use the 'Whole month' search function to see the lowest prices across the month and snap up a great deal.

  • Log into your online account or use the app to create a Price Alert. You'll be notified straight away if there's a better deal on this route. It's simple to do, and it'll save you from searching for a cheap ticket from London to SAI every day.

  • Customise your journey using filters. Adjust the total duration, number of stops, and arrival and departure times to find the right flight from London to Siem Reap-Ankor International Airport. You can also sort the results to see the 'Best,' 'Fastest' or 'Cheapest' options first.

The best time to fly from London to Siem Reap-Ankor International Airport (SAI)

  • It's time to choose your travel dates for your flight from London to Siem Reap-Ankor International Airport. August is the busiest month to visit Siem Reap. If you want a quieter vibe, go in April.

  • Think about the kind of weather that'll suit your plans for Siem Reap. The warmest month is March. Book your flights from London to SAI during then and you can expect temperatures of between 22ºC and 38ºC.

  • Look for cheap flights from London to Siem Reap-Ankor International Airport in January if you'd rather travel during cooler conditions. Temperatures are at their lowest then, ranging between 18ºC and 33ºC on average.

More about Siem Reap

  • Once you've booked your flight from London to Siem Reap-Ankor International Airport, think about where to rest your head in this city. Make one of these options your base for exploring Siem Reap:

  • Bayon Temple and Angkor Thom are just the start of the big attractions to add to your Siem Reap must-do list. Continue your sightseeing adventures at Pub Street.

Complete your Siem Reap trip with a car rental

  • Shut down all those tabs and leave the hard work to us. We've also got incredible deals on car rentals in Siem Reap once you've booked your hotel and cheap flight from London to Siem Reap-Ankor International Airport. Easily compare prices in one place and drive off with the perfect rental for less.

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