Cheap Flights from Siem Reap–Angkor to London Heathrow from RM4,083

Compare Siem Reap–Angkor to London Heathrow flight deals

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Flight deals from Siem Reap–Angkor to London Heathrow

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

London.RM4,083 per passenger.Departing Sat, 20 Sep, returning Sat, 27 Sep.Return flight with Emirates.Outbound indirect flight with Emirates, departs from Siem Reap–Angkor on Sat, 20 Sep, arriving in London Heathrow.Inbound indirect flight with Emirates, departs from London Heathrow on Sat, 27 Sep, arriving in Siem Reap–Angkor .Price includes taxes and charges.From RM4,083, select.

London.RM4,119 per passenger.Departing Thu, 6 Nov, returning Fri, 21 Nov.Return flight with Emirates.Outbound indirect flight with Emirates, departs from Siem Reap–Angkor on Thu, 6 Nov, arriving in London Heathrow.Inbound indirect flight with Emirates, departs from London Heathrow on Fri, 21 Nov, arriving in Siem Reap–Angkor .Price includes taxes and charges.From RM4,119, select.

London.RM4,473 per passenger.Departing Sun, 25 Jan, returning Sun, 1 Feb.Return flight with Emirates.Outbound indirect flight with Emirates, departs from Siem Reap–Angkor on Sun, 25 Jan, arriving in London Heathrow.Inbound indirect flight with Emirates, departs from London Heathrow on Sun, 1 Feb, arriving in Siem Reap–Angkor .Price includes taxes and charges.From RM4,473, select.

London.RM4,565 per passenger.Departing Tue, 30 Sep, returning Wed, 5 Nov.Return flight with Emirates.Outbound indirect flight with Emirates, departs from Siem Reap–Angkor on Tue, 30 Sep, arriving in London Heathrow.Inbound indirect flight with Emirates, departs from London Heathrow on Wed, 5 Nov, arriving in Siem Reap–Angkor .Price includes taxes and charges.From RM4,565, select.

London.RM4,693 per passenger.Departing Thu, 23 Oct, returning Wed, 5 Nov.Return flight with Emirates.Outbound indirect flight with Emirates, departs from Siem Reap–Angkor on Thu, 23 Oct, arriving in London Heathrow.Inbound indirect flight with Emirates, departs from London Heathrow on Wed, 5 Nov, arriving in Siem Reap–Angkor .Price includes taxes and charges.From RM4,693, select.

London.RM5,564 per passenger.Departing Mon, 15 Sep, returning Fri, 3 Oct.Return flight with Bangkok Airways and Etihad Airways.Outbound indirect flight with Bangkok Airways, departs from Siem Reap–Angkor on Mon, 15 Sep, arriving in London Heathrow.Inbound indirect flight with Etihad Airways, departs from London Heathrow on Fri, 3 Oct, arriving in Siem Reap–Angkor .Price includes taxes and charges.From RM5,564, select.

London.RM5,884 per passenger.Departing Wed, 1 Oct, returning Thu, 30 Oct.Return flight with Singapore Airlines.Outbound indirect flight with Singapore Airlines, departs from Siem Reap–Angkor on Wed, 1 Oct, arriving in London Heathrow.Inbound indirect flight with Singapore Airlines, departs from London Heathrow on Thu, 30 Oct, arriving in Siem Reap–Angkor .Price includes taxes and charges.From RM5,884, select.

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

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

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Siem Reap–Angkor to London Heathrow: Alternative routes

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

Siem Reap to London: Flight information

The things to know before you go.

Cheapest flight found	RM4,083
Cheapest month to fly	September

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

How much are return flights from Siem Reap–Angkor to London Heathrow?

The best price we found for a return flight from Siem Reap–Angkor to London Heathrow is RM4,083. 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.

Which airlines fly direct from Siem Reap–Angkor to London Heathrow?

Currently, there are no airlines that fly direct from Siem Reap–Angkor to London Heathrow. But we found flights with one or more stops from RM4,083.

How many flights are there a week from Siem Reap–Angkor to London Heathrow?

As of September 2025, there are no flights flying from Siem Reap–Angkor to London Heathrow.

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

The cheapest month to fly from Siem Reap–Angkor to London Heathrow is usually September.

Which upcoming date is cheapest to fly from Siem Reap–Angkor Airport to London Heathrow Airport on?

After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Siem Reap–Angkor Airport to London Heathrow Airport on Saturday, 20 September 2025.

Can I get a direct flight from Siem Reap–Angkor Airport to London Heathrow Airport?

No airlines currently offer direct flights between Siem Reap–Angkor Airport and London Heathrow Airport. Most routes have one or more stops.

How can I find the best flight deal to London Heathrow?

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 London Heathrow 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.

When is the best time to book flights to London?

We crunched all the numbers in our flight calendar and it looks like the cheapest time to book a flight to London is around 40 days in advance, so don’t leave your flight to the last minute.

Which is the cheapest airline to fly from Siem Reap–Angkor Airport to London Heathrow with?

Currently, Emirates offers the cheapest flight tickets to London Heathrow.

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

London's timezone is UTC+0, making London seven hours behind Siem Reap.
Arriving two hours before an international flight and one hour ahead of a domestic departure are travel rules worth sticking to. Get to the airport on time to board your SAI to LHR flight.
Flying during a peak time such as April? Major public holidays and other popular seasons can result in longer lines and delays at security. Play it safe and get there up to four hours ahead of an international flight and two hours before domestic departures.
We make it a breeze to book a flight with a stopover. To see all your options for tickets from Siem Reap-Ankor International Airport to London Heathrow Airport, uncheck 'Direct flights only.' Then, choose a flight offering a stop long enough to tour your chosen city. Some great stopovers between SAI and LHR include:
- Suvarnabhumi Airport
- Kuala Lumpur International Airport
- Changi International Airport

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

The lowest price we've seen for a one-way Siem Reap-Ankor International Airport to London Heathrow Airport flight is RM1,463. A round-trip fare is currently RM4,083. Depending on the availability and when you book, these fares may change.
To pick up cheap tickets from SAI to LHR, book early. Airlines usually offer lower fares when flights are first made available.
If you can be flexible with your trip dates, try using the 'Whole month' search function. It'll show you the cheapest price across the month when searching for a flight from Siem Reap-Ankor International Airport to London Heathrow Airport.
Finding cheap flights from SAI to LHR is easy with Price Alerts. Simply set up one of these automatic alerts and we'll let you know when a new discounted fare appears.
Find the perfect flight for you by using the filters. To see the 'Cheapest,' 'Best' or 'Fastest' flights from Siem Reap-Ankor International Airport to London Heathrow Airport, use the 'Sort by' tool. You can also filter results by airline, arrival and departure times, and journey duration.

Handy information about Siem Reap-Ankor International Airport (SAI)

80.01% of flights departing from Siem Reap-Ankor International Airport land at their destination on schedule. With its dependable on-time performance, disruptions are unlikely when jetting out of SAI.
To reach Siem Reap-Ankor International Airport from central Siem Reap, it takes about 1 hour if you're planning to drive. Of course, this depends on traffic. It's approximately 48 kilometres from the airport to the city centre.
Get your flight from Siem Reap-Ankor International Airport to London Heathrow Airport off to an easy start. Just a quick drive from SAI, stay at Chansor Community Homestay 18 and be well-rested for the journey ahead.

Arriving at London Heathrow Airport (LHR)

If you're getting in on a late Siem Reap-Ankor International Airport to London Heathrow Airport flight, nothing tops the convenience of being close to the terminal. Pick up your bags from the carousel and then be showered and relaxing not long after at one of these hotels near LHR:
Follow your own route with a London Heathrow Airport rental car. Pick up a set of wheels from Surprice, U-Save or Green Motion and chase adventure across London and beyond.
For the best deal, book your vehicle from London Heathrow Airport around one week in advance.

Getting from London Heathrow Airport (LHR) to central London

London Heathrow Airport is approximately 31 kilometres from central London. The drive time takes around 55 minutes.
It takes roughly 1 hour when travelling by public transport.

When to fly to London Heathrow Airport (LHR)

It's time to plan your dates for your flight from Siem Reap-Ankor International Airport to London Heathrow Airport. July is the busiest month to visit London. If you want a more laid-back vibe, go in February.
When reserving your flight from Siem Reap-Ankor International Airport to London Heathrow Airport, think about the type of weather you enjoy. July is the warmest month in London, with temperatures ranging from 11ºC (52ºF) to 26ºC (79ºF).
If you want to travel in cooler conditions, search for a cheap ticket from SAI to LHR in January. Average temperatures are between 0ºC (32ºF) and 9ºC (48ºF) then.

Explore more of United Kingdom

London has plenty to offer, but there are so many other corners of United Kingdom waiting to be explored. About 161 kilometres north-west of London, a trip to Birmingham will fill your itinerary to the brim. Start with popular sights like Cadbury World, The Library of Birmingham and National Sea Life Centre.
Bristol is another sought-after destination in United Kingdom and is around 177 kilometres west of London. No journey is complete without experiencing Clifton Suspension Bridge, Cabot Tower and Brandon Hill Nature Park.