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628 € Cheap Flights from London to Siem Reap–Angkor

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Flight deals from London to Siem Reap–Angkor Airport

Looking for a cheap last-minute deal or the best return flight from London to Siem Reap–Angkor Airport? If you want to travel next month, return fares start from 748 €. Find the lowest prices on one-way and return tickets right here.
Siem Reap.628 € per passenger.Departing Fri, 6 Nov, returning Tue, 24 Nov.Return flight with Austrian Airlines.Outbound indirect flight with Austrian Airlines, departs from London Heathrow on Fri, 6 Nov, arriving in Siem Reap–Angkor .Inbound indirect flight with Austrian Airlines, departs from Siem Reap–Angkor on Tue, 24 Nov, arriving in London Heathrow.Price includes taxes and charges.From 628 €, select.
Siem Reap.631 € per passenger.Departing Wed, 6 May, returning Wed, 27 May.Return flight with Pegasus Airlines and China Eastern.Outbound indirect flight with Pegasus Airlines, departs from London Stansted on Wed, 6 May, arriving in Siem Reap–Angkor .Inbound indirect flight with China Eastern, departs from Siem Reap–Angkor on Wed, 27 May, arriving in London Heathrow.Price includes taxes and charges.From 631 €, select.
Siem Reap.631 € per passenger.Departing Sun, 10 May, returning Tue, 9 Jun.Return flight with Pegasus Airlines and VietJet Air.Outbound indirect flight with Pegasus Airlines, departs from London Stansted on Sun, 10 May, arriving in Siem Reap–Angkor .Inbound indirect flight with VietJet Air, departs from Siem Reap–Angkor on Tue, 9 Jun, arriving in London Gatwick.Price includes taxes and charges.From 631 €, select.
Siem Reap.654 € per passenger.Departing Tue, 21 Apr, returning Tue, 12 May.Return flight with Pegasus Airlines and Thai AirAsia.Outbound indirect flight with Pegasus Airlines, departs from London Stansted on Tue, 21 Apr, arriving in Siem Reap–Angkor .Inbound indirect flight with Thai AirAsia, departs from Siem Reap–Angkor on Tue, 12 May, arriving in London Heathrow.Price includes taxes and charges.From 654 €, select.
Siem Reap.671 € per passenger.Departing Thu, 4 Jun, returning Wed, 10 Jun.Return flight with Austrian Airlines and SWISS.Outbound indirect flight with Austrian Airlines, departs from London Heathrow on Thu, 4 Jun, arriving in Siem Reap–Angkor .Inbound indirect flight with SWISS, departs from Siem Reap–Angkor on Wed, 10 Jun, arriving in London Heathrow.Price includes taxes and charges.From 671 €, select.
Siem Reap.731 € per passenger.Departing Wed, 8 Apr, returning Fri, 5 Jun.Return flight with China Eastern.Outbound indirect flight with China Eastern, departs from London Gatwick on Wed, 8 Apr, arriving in Siem Reap–Angkor .Inbound indirect flight with China Eastern, departs from Siem Reap–Angkor on Fri, 5 Jun, arriving in London Heathrow.Price includes taxes and charges.From 731 €, select.
Siem Reap.748 € per passenger.Departing Sun, 12 Apr, returning Thu, 30 Apr.Return flight with Ryanair and Thai AirAsia.Outbound indirect flight with Ryanair, departs from London Stansted on Sun, 12 Apr, arriving in Siem Reap–Angkor .Inbound indirect flight with Thai AirAsia, departs from Siem Reap–Angkor on Thu, 30 Apr, arriving in London Heathrow.Price includes taxes and charges.From 748 €, select.
Siem Reap.767 € per passenger.Departing Mon, 4 May, returning Sat, 12 Sep.Return flight with Pegasus Airlines and Bangkok Airways.Outbound indirect flight with Pegasus Airlines, departs from London Stansted on Mon, 4 May, arriving in Siem Reap–Angkor .Inbound indirect flight with Bangkok Airways, departs from Siem Reap–Angkor on Sat, 12 Sep, arriving in London Stansted.Price includes taxes and charges.From 767 €, select.
Siem Reap.768 € per passenger.Departing Sat, 19 Sep, returning Tue, 29 Sep.Return flight with Condor and Bangkok Airways.Outbound indirect flight with Condor, departs from London Gatwick on Sat, 19 Sep, arriving in Siem Reap–Angkor .Inbound indirect flight with Bangkok Airways, departs from Siem Reap–Angkor on Tue, 29 Sep, arriving in London Gatwick.Price includes taxes and charges.From 768 €, select.
Siem Reap.780 € per passenger.Departing Thu, 1 Oct, returning Thu, 8 Oct.Return flight with Condor and Bangkok Airways.Outbound indirect flight with Condor, departs from London Gatwick on Thu, 1 Oct, arriving in Siem Reap–Angkor .Inbound indirect flight with Bangkok Airways, departs from Siem Reap–Angkor on Thu, 8 Oct, arriving in London Gatwick.Price includes taxes and charges.From 780 €, select.
Siem Reap.781 € per passenger.Departing Sun, 20 Sep, returning Sun, 4 Oct.Return flight with Condor and Bangkok Airways.Outbound indirect flight with Condor, departs from London Gatwick on Sun, 20 Sep, arriving in Siem Reap–Angkor .Inbound indirect flight with Bangkok Airways, departs from Siem Reap–Angkor on Sun, 4 Oct, arriving in London Gatwick.Price includes taxes and charges.From 781 €, select.
Siem Reap.782 € per passenger.Departing Tue, 7 Apr, returning Fri, 17 Jul.Return flight with Ryanair and Bangkok Airways.Outbound indirect flight with Ryanair, departs from London Stansted on Tue, 7 Apr, arriving in Siem Reap–Angkor .Inbound indirect flight with Bangkok Airways, departs from Siem Reap–Angkor on Fri, 17 Jul, arriving in London Heathrow.Price includes taxes and charges.From 782 €, select.
Siem Reap.788 € per passenger.Departing Thu, 18 Jun, returning Thu, 2 Jul.Return flight with Pegasus Airlines and Bangkok Airways.Outbound indirect flight with Pegasus Airlines, departs from London Stansted on Thu, 18 Jun, arriving in Siem Reap–Angkor .Inbound indirect flight with Bangkok Airways, departs from Siem Reap–Angkor on Thu, 2 Jul, arriving in London Heathrow.Price includes taxes and charges.From 788 €, select.
Siem Reap.823 € per passenger.Departing Mon, 1 Feb, returning Mon, 15 Feb.Return flight with Singapore Airlines.Outbound indirect flight with Singapore Airlines, departs from London Gatwick on Mon, 1 Feb, arriving in Siem Reap–Angkor .Inbound indirect flight with Singapore Airlines, departs from Siem Reap–Angkor on Mon, 15 Feb, arriving in London Gatwick.Price includes taxes and charges.From 823 €, select.
Siem Reap.824 € per passenger.Departing Tue, 1 Dec, returning Tue, 8 Dec.Return flight with Singapore Airlines.Outbound indirect flight with Singapore Airlines, departs from London Gatwick on Tue, 1 Dec, arriving in Siem Reap–Angkor .Inbound indirect flight with Singapore Airlines, departs from Siem Reap–Angkor on Tue, 8 Dec, arriving in London Gatwick.Price includes taxes and charges.From 824 €, select.
Siem Reap.824 € per passenger.Departing Tue, 17 Nov, returning Tue, 8 Dec.Return flight with Singapore Airlines.Outbound indirect flight with Singapore Airlines, departs from London Gatwick on Tue, 17 Nov, arriving in Siem Reap–Angkor .Inbound indirect flight with Singapore Airlines, departs from Siem Reap–Angkor on Tue, 8 Dec, arriving in London Gatwick.Price includes taxes and charges.From 824 €, 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 November.
Mar
from 890 €
Apr
from 748 €
May
from 631 €
Jun
from 671 €
Jul
from 932 €
Aug
from 1.031 €
Sep
from 768 €
Oct
from 780 €
Nov
from 628 €
Dec
from 824 €
Jan
from 846 €
Feb
from 823 €

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 .

Siem Reap–Angkor

41km from central Siem Reap
ClosestCheapest
from 628 €
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London to Siem Reap: Flight information

The things to know before you go.
Cheapest flight found628 €
Cheapest month to flyNovember

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 628 €. 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 628 €.
As of March 2026, there are no flights flying from London to Siem Reap–Angkor .
The cheapest month to fly from London to Siem Reap–Angkor is usually November.
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 Friday, 6 November 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 Austrian Airlines .

Travelling from London to Siem Reap Angkor Airport (SAI): What you need to know

  • Siem Reap is seven hours ahead of London. Siem Reap Angkor Airport is located in Siem Reap, which runs on the UTC+7 timezone.

  • 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 the stress of rushing.

  • During popular months such as July, you'll want to get to the airport earlier than normal. Plan to arrive two hours before a domestic departure and four hours ahead of an international flight when you fly during a peak period in general.

Airports in London

London Heathrow Airport (LHR)

  • A stopover is the perfect opportunity to break up your trip and perhaps even explore a different city. When searching for cheap flights from London to SAI departing from London Heathrow Airport (LHR), uncheck the 'Direct flights only' box to find all potential stops. Popular options include:

    • Kuala Lumpur International Airport (KUL)

    • Bangkok Suvarnabhumi International Airport (BKK)

    • Singapore Changi Airport (SIN)

  • LHR is about 24 kilometres from central London. If you're driving, ride-sharing or catching a taxi from the centre, it'll take you 45 minutes or so to get there, depending on the traffic. If you're using public transport, expect the trip time to be around 25 minutes.

  • Catching an early flight from London to Siem Reap Angkor Airport? Avoid rushing to the terminal (and get a little more snooze time) by staying at one of these hotels close to London Heathrow Airport:

  • When it comes to London Heathrow Airport's on-time performance, data shows 68% of flights stick to their scheduled arrival time.

London Gatwick Airport (LGW)

  • Break up your flight from London to Siem Reap Angkor Airport with a stop at Bangkok Suvarnabhumi International Airport (BKK). One of the main stopovers between London Gatwick Airport and SAI, it's the perfect opportunity to relax before the next leg of your journey.

  • LGW is about 48 kilometres from central London. It takes 1 hour 5 minutes or so to get to the airport in a car from the city centre. Public transport takes roughly 1 hour 20 minutes.

  • Start your holiday early with an additional night away from home. Before your London to SAI flight, stay in one of these hotels close to London Gatwick Airport:

  • London Gatwick Airport has an on-time performance rate of 70%. This figure highlights how often flights departing from this airport arrive at their destination on time.

London Stansted Airport (STN)

  • STN is roughly 56 kilometres from central London. The drive from the city centre to the terminal takes about 1 hour 5 minutes. If you're thinking about using public transport, you can expect a journey of around 45 minutes.

  • Make catching an early London to Siem Reap Angkor Airport flight the easiest part of your trip. Book a room at one of these hotels near London Stansted Airport and get to your boarding gate feeling relaxed and unhurried:

  • Airports have an on-time performance rating that measures how often flights land without delays. At STN, that rate is 65%.

About Siem Reap Angkor Airport (SAI)

  • Have a late flight from London to Siem Reap Angkor Airport? Don't let it end in exhaustion. Stay a short drive from SAI at Chansor Community Homestay 18.

Getting from Siem Reap Angkor Airport (SAI) to central Siem Reap

  • Siem Reap Angkor Airport is around 40 kilometres from central Siem Reap. The time it takes to get there in a car hire or taxi depends on the time of day. Do some research before your trip.

  • Travelling on public transport will take you roughly 25 minutes.

How to find the cheapest flights from London to Siem Reap Angkor Airport (SAI)

  • Right now, 324 € is the lowest price we've found for a one-way ticket from London to Siem Reap Angkor Airport. The cheapest price for a return flight is 628 €. Remember fares may change due to availability at the time of booking.

  • Don't wait until the last moment. You're more likely to find cheap flights from London to SAI if you book in advance. Airlines often have some amazing early bird discounts.

  • The 'Whole month' search tool shows you the cheapest London to Siem Reap Angkor Airport tickets throughout the entire month. It's a great way to snap up a bargain if your plans aren't set in stone.

  • Stay on top of deals for plane tickets from London to SAI by creating a Price Alert. We'll send you an email or push notification on the app when fares go down.

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

The best time to fly from London to Siem Reap Angkor Airport (SAI)

  • January is when most people book flights from London to Siem Reap Angkor Airport (SAI). Visit Siem Reap in October for a more laid-back experience.

  • When booking your London to SAI plane ticket, consider the weather you're most comfortable in. March is the warmest month in Siem Reap, with temperatures ranging from 22ºC (72ºF) to 38ºC (100ºF).

  • January sees temperatures of between 18ºC (64ºF) and 33ºC (91ºF). Search for cheap tickets from London to Siem Reap Angkor Airport around that time if you like travelling in cooler conditions.

More about Siem Reap

Explore more of Cambodia

  • Siem Reap has its own special appeal, but there are so many other corners of Cambodia waiting to be discovered. About 209 kilometres south of Siem Reap, a visit to Phnom Penh will keep you on the move. Start with popular sights like Royal Palace, Genocide museum and Moonlight Pavilion.

  • Next? Journey to Ta Khmau. It's about 225 kilometres south of Siem Reap and is home to highlights including Statue of Ta Khmau and AV.

More travel options

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.