Skyscanner

Cheap Flights from London to Siem Reap–Angkor

Compare London to Siem Reap–Angkor flight deals

Find the cheapest month or even day of the year to fly to Siem Reap–Angkor

Book the best Siem Reap–Angkor fare with no extra fees

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.
Siem Reap.Rs101,020 per passenger.Departing Sat, 21 Mar.One-way flight with Ryanair.Outbound indirect flight with Ryanair, departs from London Stansted on Sat, 21 Mar, arriving in Siem Reap–Angkor .Price includes taxes and charges.From Rs101,020, select.
Siem Reap.Rs109,247 per passenger.Departing Sun, 28 Sep.One-way flight with AJet.Outbound indirect flight with AJet, departs from London Stansted on Sun, 28 Sep, arriving in Siem Reap–Angkor .Price includes taxes and charges.From Rs109,247, select.
Siem Reap.Rs112,257 per passenger.Departing Tue, 25 Nov.One-way flight with Wizz Air UK.Outbound indirect flight with Wizz Air UK, departs from London Gatwick on Tue, 25 Nov, arriving in Siem Reap–Angkor .Price includes taxes and charges.From Rs112,257, select.
Siem Reap.Rs114,178 per passenger.Departing Thu, 16 Oct.One-way flight with Wizz Air UK.Outbound indirect flight with Wizz Air UK, departs from London Gatwick on Thu, 16 Oct, arriving in Siem Reap–Angkor .Price includes taxes and charges.From Rs114,178, select.
Siem Reap.Rs114,365 per passenger.Departing Sun, 31 Aug.One-way flight with Wizz Air UK.Outbound indirect flight with Wizz Air UK, departs from London Gatwick on Sun, 31 Aug, arriving in Siem Reap–Angkor .Price includes taxes and charges.From Rs114,365, select.
Siem Reap.Rs116,431 per passenger.Departing Tue, 3 Feb.One-way flight with Wizz Air UK.Outbound indirect flight with Wizz Air UK, departs from London Gatwick on Tue, 3 Feb, arriving in Siem Reap–Angkor .Price includes taxes and charges.From Rs116,431, select.
Siem Reap.Rs116,668 per passenger.Departing Sun, 11 Jan.One-way flight with Wizz Air UK.Outbound indirect flight with Wizz Air UK, departs from London Gatwick on Sun, 11 Jan, arriving in Siem Reap–Angkor .Price includes taxes and charges.From Rs116,668, select.
Siem Reap.Rs122,119 per passenger.Departing Mon, 1 Dec.One-way flight with Pegasus Airlines.Outbound indirect flight with Pegasus Airlines, departs from London Stansted on Mon, 1 Dec, arriving in Siem Reap–Angkor .Price includes taxes and charges.From Rs122,119, select.

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 March.
Aug
from Rs114,365
Sep
from Rs109,247
Oct
from Rs114,178
Nov
from Rs112,257
Dec
from Rs122,119
Jan
from Rs116,668
Feb
from Rs116,431
Mar
from Rs101,020
Apr
from Rs126,388
May
from Rs138,711
Jun
from Rs127,661
Jul
from Rs173,352

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 foundRs101,020
Cheapest month to flyMarch

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 Rs202,520. 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 Rs202,520.
As of August 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 March.
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, 21 March 2026.
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 Ryanair .

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

  • London has plenty of airports to take off from. Check out your departure options from London Heathrow Airport (LHR) and London Gatwick Airport (LGW) when planning 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-Ankor International Airport is located in Siem Reap. The city follows the UTC+7 timezone and is seven hours ahead of London.

  • Arrive at the airport on time so you don't miss your flight from London to SAI. Be there at least two hours ahead for international flights and an hour early for domestic departures to avoid any last-minute rush.

  • Delays at check-in and security are more likely if you're jetting off during high season, so allow some extra breathing room. The recommendation for peak times? Get there up to four hours early for international flights and two hours for domestic departures.

Airports in London

London Heathrow Airport (LHR)

  • Think about adding a stopover to find cheap flights from London to SAI. Just uncheck 'Direct flights only' when browsing departures from London Heathrow Airport (LHR). Pause your trip (and maybe pocket some savings) with a stop at one of these airports:

    • Kuala Lumpur International Airport (KUL)

    • Suvarnabhumi Airport (BKK)

    • Changi International Airport (SIN)

  • Located around 31 kilometres from central London, LHR can be reached in about 55 minutes by car, depending on traffic. The journey on public transport takes roughly 1 hour.

  • Searching for a convenient hotel near London Heathrow Airport? If you're catching an early flight from London to Siem Reap-Ankor International Airport, these stays will put you moments from your departure gate:

  • Of the flights that depart from London Heathrow Airport, 68.18% land on schedule at their destination.

London Gatwick Airport (LGW)

  • Break up your flight from London to Siem Reap-Ankor International Airport with a stop at Suvarnabhumi Airport (BKK). A major connection between London Gatwick Airport and SAI, it's a great opportunity to unwind before your onward flight.

  • You can arrive at LGW from central London in about 1 hour 20 minutes by car, depending on traffic conditions. The journey by public transport takes roughly 30 minutes to cover the 80 kilometres or so.

  • Want to enjoy an extra night away before your London to SAI flight? Relax in a hotel near London Gatwick Airport before your break officially begins. These stays are expecting you:

  • London Gatwick Airport has an on-time performance of 69.26%. This figure gives an insight into how frequently flights that take off from this airport reach their destination on schedule.

Stansted Airport (STN)

  • STN is roughly 64 kilometres from central London. The drive from the city centre to the airport takes about 1 hour. If you're planning to use public transport, you can expect a journey of around 1 hour 25 minutes.

  • Sleep a little longer and still make your London to Siem Reap-Ankor International Airport flight without having to rush. These hotels near Stansted Airport make it a breeze to get to the terminal if you're jetting off early:

  • Flights departing from STN touch down at their destination on schedule 64.73% of the time.

About Siem Reap-Ankor International Airport (SAI)

  • Coming in on a late flight from London to Siem Reap-Ankor International Airport? Don't let it stretch your travel day into tomorrow. Stay within easy reach of SAI at Chansor Community Homestay 18.

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

  • The lowest price we've found for a one-way ticket from London to Siem Reap-Ankor International Airport is Rs101,020. For a return flight on this route, the best price is Rs202,520. Depending on the availability and when you book, these fares could change.

  • Booking early is often the key to scoring a cheap flight from London to SAI. Fares tend to rise as demand increases, so the closer you get to departure, the more expensive your ticket may be.

  • If you have some flexibility with your trip dates, try using the 'Whole month' tool. It'll show you the lowest price across every month when searching for your London to Siem Reap-Ankor International Airport ticket.

  • Snapping up a cheap flight ticket from London to SAI couldn't be easier with Price Alerts. Simply set up one of these automatic alerts and we'll let you know when the price has dropped.

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

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

  • It's time to decide when to book your flight from London to Siem Reap-Ankor International Airport (SAI). August is when most people visit Siem Reap. If you're all about a more relaxed kind of trip, think about going in April.

  • The warmest month in Siem Reap is March, with temperatures ranging between 22ºC and 38ºC. Book your London to SAI flight ticket then if you enjoy this type of weather.

  • January sees temperatures of between 18ºC and 33ºC. Search for cheap tickets from London to Siem Reap-Ankor International Airport around that time if you like travelling in cooler conditions.

More about Siem Reap

Explore more of Cambodia

  • You've done Siem Reap, now it's time to discover other parts of Cambodia. Travel about 209 kilometres south to Phnom Penh to check off its popular sights. From Royal Palace to Tuol Sleng Genocide Museum and Genocide museum, you'll have a full itinerary ahead.

  • Ta Khmau is another well-known destination in Cambodia and is around 225 kilometres south of Siem Reap. No trip is complete without seeing មាត់ទន្លេតាខ្មៅ - Ta Khmao Riverside, Statue of Ta Khmau and AV.

Plan the rest of your trip from London to Siem Reap

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