Cheap flight deals from London to Siem Reap Starting at AED 1,846

We've found these cheap flights for you. You can book one-way or round-trip flight tickets.

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Crossed out prices are calculated based on the average price of the corresponding route on Trip.com.

When is the cheapest time to fly from London to Siem Reap?

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  • 16 23
  • 23 30

  • Apr

    30 6
  • 6 13
  • 13 20
  • 20 27

  • May

    27 4
  • 4 11
  • 11 18
  • 18 25

  • Jun

    25 1
  • 1 8
Displayed prices are calculated based on the cheapest average weekly prices of the corresponding route on Trip.com.

Frequently Asked Questions

  • When are flight tickets from London (LON) to Siem Reap (REP) the cheapest?

    Airlines adjust prices for flights from London to Siem Reap based on the date and time of your booking. By analyzing data from all airlines, on Trip.com, you can find the lowest flight prices on Tuesdays, Wednesdays, and Saturdays.

  • How much do flights from London (LON) to Siem Reap (REP) cost?

    According to Trip.com's data, the lowest price is around AED 3,987.

  • What is the transportation method from the main airport to downtown in Siem Reap?

    • The distance from Siem Reap Angkor International Airport to downtown is about 39 km, by taxi about 50 minutes.

  • How many airports are there in Siem Reap (REP)?

    There are 1 airport(s) near Siem Reap (REP): Siem Reap Angkor International Airport.

How to find a cheap flight from London to Siem Reap

Wait until the last minute and flight costs are often sky-high. Plan ahead, book the right way, and your savings can soar. We have loads of saving tips to help you find a cheap flight from London to Siem Reap. Book your flights at the right time and save more.
1
Being flexible with your dates to get the cheapest London to Siem Reap ticket.
Tap "Date" on flight search bar to scan through the calender for London to Siem Reap airfare over next 6 months in 2025. If you would like to fly in next 3 months, it seems the cheapest date is on Fri, Mar 21 at AED 1846 for one-way flights.
2
Compare cheap London to Siem Reap flight deals from over hundreds of airlines.
Our extensive search allows you to compare prices from over 500 airlines to choose the cheapest flight tickets from London to Siem Reap. The cheapest airline operating is Singapore Airlines.
3
Set up a Price Alert
By setting up a Price Alert for your London to Siem Reap route, you can easily track the price of your airline tickets from without manually checking every day.
4
Don't miss cheap London to Siem Reap flight deals and promo codes.
You can always get the latest deals through Trip.com Deals and Promo Codes for cheap flights. If registering a free membership, you can receive more deals for your flights.
5
Book early or wait unitl the last minute.
It's always better to book early. Flight tickets tend to be the cheapest when they are first released, normally about a year before the departure date. So, check online as soon as the flights you want become available. If you miss the cheapest time, you can still find lower-priced tickets as the flight date approaches.
6
Search for flights on the go.
To get the best flight booking experience on the go, download Trip.com and search for cheap flight tickets from London to Siem Reap to get exclusive deals for you.

Flight Info | London to Siem Reap

Cheapest one-way flight price AED 1,846
Off-season for travel May
Peak season for travel December
Flight distance 9,783.08 km
Popular airline Emirates

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