Question 1

What’s the top stopover airport for flights from London to Siem Reap?

Accepted Answer

Singapore (SIN) – chosen by Cheapflights users on 52% of one-stop itineraries from London to Siem Reap on Cheapflights.

Question 2

What’s the cheapest stopover airport for flights from London to Siem Reap?

Accepted Answer

Ho Chi Minh City (SGN) is the most affordable one-stop option, with an average return flight price of £731.

Question 3

Which airport typically offers the quickest stopover for flights from London to Siem Reap?

Accepted Answer

Flights via Bangkok (BKK) offer the fastest connection on this route, with an average stopover time of 1h 41m.

Question 4

What’s the fastest stopover option from London to Siem Reap?

Accepted Answer

Flights via Bangkok (BKK) have the shortest average one-way travel time for one-stop routes: 13h 55m.

Question 5

What are the cheapest airlines flying from London to Siem Reap round-trip?

Accepted Answer

Our cheapest airline available from London to Siem Reap is Austrian Airlines. Our recent data shows that you can find tickets from as low as £547 on this airline. Additional options worth looking into are Vietnam Airlines and Singapore Airlines, starting at £625 and £673 round-trip. Austrian Airlines is priced at 34% lower than the current average price of a flight leaving 3 months from now.

Question 6

What are the cheapest airlines to fly from London to Siem Reap one-way?

Accepted Answer

The cheapest airline one-way is Austrian Airlines, with whom users have recently found tickets for as low as £384. However, be on the lookout for offers from Vietnam Airlines and Singapore Airlines, as they are both options that can get you from London to Siem Reap for a low price.

Question 7

What is the cheapest month to book a flight from London to Siem Reap?

Accepted Answer

Currently, January is the cheapest month in which you can book a flight from London to Siem Reap (average of £762). Flying from London to Siem Reap in December is currently the most expensive (average of £960). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

Question 8

E

Accepted Answer

In terms of precipitation, rainfall in Siem Reap ranges from 0.0 - 260.0 inches per month. September is typically the wettest month, when rainfall can reach 260.0 mm. January is typically the driest time to visit Siem Reap when rainfall is around 0.0 mm.

Question 9

E

Accepted Answer

If weather is an important factor for your trip to Siem Reap, use this chart to help with planning. For those seeking warmer temperatures, April is the ideal time of year to visit, when temperatures reach an average of 29.0 C. Travellers hoping to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 24.0 C).

Question 10

What are the most popular routes from London to Siem Reap?

Accepted Answer

When deciding which route to take from London to Siem Reap consider London Heathrow - Siem Reap–Angkor Intl, London City - Siem Reap–Angkor Intl or London Stansted - Siem Reap–Angkor Intl as they are the most popular.

Question 11

What are the most popular airlines that fly from London to Siem Reap?

Accepted Answer

When booking a flight from London to Siem Reap, you may want to consider flying on Singapore Airlines, Vietnam Airlines or Thai Airways as they are the most popular for this route.

Question 12

What is the cheapest time of day to fly from LON to SAI?

Accepted Answer

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from London to Siem Reap as you normally would.

Question 13

What airport do you fly into for flights to Siem Reap from London?

Accepted Answer

Located just 24.7 mi from the city center, Siem Reap–Angkor Intl is the airport most travelers will use when flying to Siem Reap from London. Booking flights from London to Siem Reap–Angkor Intl (SAI) should be relatively easy as there are 0 daily inbound flights from London from 4 different airlines.

Question 14

Can I find deals for flights from London to Siem Reap that include hotel bookings?

Accepted Answer

Yes. In addition to deals on London to Siem Reap flights, Cheapflights offers holiday packages that include both flights and hotel.

Question 15

How can I find direct flights from London to Siem Reap?

Accepted Answer

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from London to Siem Reap.

Question 16

Can I find deals for business class flights from London to Siem Reap?

Accepted Answer

Yes. Cheapflights offers flight deals from London to Siem Reap by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

Question 17

How does Cheapflights help users find flights from London to Siem Reap?

Accepted Answer

When you search for this flight from London to Siem Reap, Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the flight for you.

Question 18

Why should you use Cheapflights to find cheap flight tickets from London to Siem Reap?

Accepted Answer

Cheapflights helps you find that perfect flight to Siem Reap from London by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

Question 19

Can Cheapflights find flights from London to Siem Reap with no change fees?

Accepted Answer

Need flexible booking options for your flight to Siem Reap from London? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.

Question 20

Can Cheapflights notify me if prices for flights from London to Siem Reap become cheaper?

Accepted Answer

Of course! You can now track prices for flights from London to Siem Reap and get an alert from Cheapflights when they change. Have a valid email address ready and click the bell icon next to the flight deals above to set up your price alerts.

Popular in	December
Cheapest in	July
Average price	£779

Airline	Cheapest	Average	Flexibility	On-time
Austrian Airlines	Cheapest£547	Average£697	FlexibilityNo cancel fee	On-time78%	Search Austrian Airlines flights
Vietnam Airlines	Cheapest£625	Average£826	FlexibilityNo cancel fee	On-time81%	Search Vietnam Airlines flights
Singapore Airlines	Cheapest£673	Average£944	FlexibilityNo cancel fee	On-time81%	Search Singapore Airlines flights
Thai Airways	Cheapest£902	Average£1,013	FlexibilityNo cancel fee	On-time77%	Search Thai Airways flights

Cheap flights from London to Siem Reap, Cambodia

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Cheapflights Insights

What is the cheapest month to book a flight from London to Siem Reap?

What’s the top stopover airport for flights from London to Siem Reap?

Singapore (SIN) – chosen by Cheapflights users on 52% of one-stop itineraries from London to Siem Reap on Cheapflights.

What’s the cheapest stopover airport for flights from London to Siem Reap?

Ho Chi Minh City (SGN) is the most affordable one-stop option, with an average return flight price of £731.

What’s the fastest stopover option from London to Siem Reap?

Flights via Bangkok (BKK) have the shortest average one-way travel time for one-stop routes: 13h 55m.

Which airport typically offers the quickest stopover for flights from London to Siem Reap?

Flights via Bangkok (BKK) offer the fastest connection on this route, with an average stopover time of 1h 41m.

Reviews of airlines servicing Siem Reap

Read through reviews of airlines operating flights from London to Siem Reap, such as Singapore Airlines,Vietnam Airlines, andAustrian Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

What airport do you fly into for flights to Siem Reap from London?

What are the cheapest airlines flying from London to Siem Reap round-trip?

What are the cheapest airlines to fly from London to Siem Reap one-way?

What are the most popular routes from London to Siem Reap?

Can I find deals for flights from London to Siem Reap that include hotel bookings?

How can I find direct flights from London to Siem Reap?

Can I find deals for business class flights from London to Siem Reap?

What is the cheapest month to book a flight from London to Siem Reap?

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Alternative routes for London to Siem Reap

See prices for flight routes from nearby airports that may be better suited for you.

Complete your trip

Complete your trip to Siem Reap by adding a car hire and/or hotel booking to your travel itinerary.

Search flights from London to Siem Reap by cabin class

Find flights from London to Siem Reap, based on your preferred cabin class, be it economy, premium economy, business, or first class.

London and Siem Reap flights

Browse other London and Siem Reap flight options. Last updated on 29 September 2026.

Other flights from London

Browse through other flights departing from London. Flights are based on user searches made on Cheapflights and were last updated on 29 September 2026.

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Top 4 airlines flying from London to Siem Reap

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How does Cheapflights help users find flights from London to Siem Reap?

Why should you use Cheapflights to find cheap flight tickets from London to Siem Reap?

Can Cheapflights find flights from London to Siem Reap with no change fees?

Can Cheapflights notify me if prices for flights from London to Siem Reap become cheaper?

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