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C$525 Cheap Flights from Siem Reap–Angkor (SAI) to London Heathrow (LHR)

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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 Airport to London Heathrow Airport? If you want to travel next month, return fares start from C$1,464. Find the lowest prices on one-way and return tickets right here.
London.C$525 per passenger.Departing Mon., Nov. 16.One-way flight with Thai AirAsia.Outbound indirect flight with Thai AirAsia, departs from Siem Reap–Angkor on Mon., Nov. 16, arriving in London Heathrow.Price includes taxes and charges.From C$525, select.
London.C$557 per passenger.Departing Thu., Oct. 29.One-way flight with Emirates.Outbound indirect flight with Emirates, departs from Siem Reap–Angkor on Thu., Oct. 29, arriving in London Heathrow.Price includes taxes and charges.From C$557, select.
London.C$571 per passenger.Departing Tue., Dec. 8.One-way flight with Vietnam Airlines.Outbound indirect flight with Vietnam Airlines, departs from Siem Reap–Angkor on Tue., Dec. 8, arriving in London Heathrow.Price includes taxes and charges.From C$571, select.
London.C$584 per passenger.Departing Sun., Jun. 21.One-way flight with Bangkok Airways.Outbound indirect flight with Bangkok Airways, departs from Siem Reap–Angkor on Sun., Jun. 21, arriving in London Heathrow.Price includes taxes and charges.From C$584, select.
London.C$637 per passenger.Departing Thu., Jul. 2.One-way flight with Air Cambodia.Outbound indirect flight with Air Cambodia, departs from Siem Reap–Angkor on Thu., Jul. 2, arriving in London Heathrow.Price includes taxes and charges.From C$637, select.
London.C$696 per passenger.Departing Tue., Mar. 2.One-way flight with Bangkok Airways.Outbound indirect flight with Bangkok Airways, departs from Siem Reap–Angkor on Tue., Mar. 2, arriving in London Heathrow.Price includes taxes and charges.From C$696, select.
London.C$730 per passenger.Departing Mon., Feb. 1.One-way flight with Bangkok Airways.Outbound indirect flight with Bangkok Airways, departs from Siem Reap–Angkor on Mon., Feb. 1, arriving in London Heathrow.Price includes taxes and charges.From C$730, select.
London.C$753 per passenger.Departing Fri., Sep. 4.One-way flight with Vietnam Airlines.Outbound indirect flight with Vietnam Airlines, departs from Siem Reap–Angkor on Fri., Sep. 4, arriving in London Heathrow.Price includes taxes and charges.From C$753, select.
London.C$759 per passenger.Departing Sat., Jan. 30.One-way flight with Emirates.Outbound indirect flight with Emirates, departs from Siem Reap–Angkor on Sat., Jan. 30, arriving in London Heathrow.Price includes taxes and charges.From C$759, select.
London.C$759 per passenger.Departing Sun., May 2.One-way flight with Emirates.Outbound indirect flight with Emirates, departs from Siem Reap–Angkor on Sun., May 2, arriving in London Heathrow.Price includes taxes and charges.From C$759, select.
London.C$761 per passenger.Departing Thu., Apr. 29.One-way flight with Emirates.Outbound indirect flight with Emirates, departs from Siem Reap–Angkor on Thu., Apr. 29, arriving in London Heathrow.Price includes taxes and charges.From C$761, select.
London.C$774 per passenger.Departing Sat., Aug. 1.One-way flight with Emirates.Outbound indirect flight with Emirates, departs from Siem Reap–Angkor on Sat., Aug. 1, arriving in London Heathrow.Price includes taxes and charges.From C$774, 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 November.
May
Find prices
Jun.
from C$584
Jul.
from C$637
Aug.
from C$774
Sep.
from C$753
Oct.
from C$557
Nov.
from C$525
Dec.
from C$572
Jan.
from C$760
Feb.
from C$730
Mar.
from C$696
Apr.
from C$762

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.

London City

12km from central London
Closest
from C$779
Search flights

London Heathrow

23km from central London
from C$525
Search flights

London Gatwick

40km from central London
Cheapest
from C$421
Search flights

London Luton

45km from central London
from C$616
Search flights

London Stansted

49km from central London
from C$500
Search flights

London Southend

57km from central London
from C$723
Search flights

Siem Reap to London: Flight information

The things to know before you go.
Cheapest flight foundC$525
Cheapest month to flyNovember

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

The best price we found for a return flight from Siem Reap–Angkor to London Heathrow is C$1,460. 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 Siem Reap–Angkor to London Heathrow. But we found flights with one or more stops from C$1,461.
As of May 2026, there are no flights flying from Siem Reap–Angkor to London Heathrow.
The cheapest month to fly from Siem Reap–Angkor to London Heathrow is usually September.
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 Friday, September 11, 2026.
No airlines currently offer direct flights between Siem Reap–Angkor Airport and London Heathrow 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 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.
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.
Currently, Etihad Airways offers the cheapest flight tickets to London Heathrow.

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

  • During popular months like August, it's best to get to the airport earlier. Arrive two hours before domestic departures and four hours ahead for international flights whenever you're flying during a high season in general.

  • We make it simple to get a flight with a stopover. To see the options for flights from Siem Reap-Ankor International Airport to London Heathrow Airport, deselect 'Direct flights only.' Then, choose a flight offering a stop long enough to tour the city of your choice. Some popular stopovers between SAI and LHR include:

    • Kuala Lumpur International Airport

    • Changi International Airport

    • Suvarnabhumi Airport

  • To see if you need a visa to enter United Kingdom, contact your carrier and the local consulate or embassy. They'll give you the most up-to-date information, including additional documents you may need after booking your cheap ticket from SAI to LHR.

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 ticket from Siem Reap-Ankor International Airport to London Heathrow Airport is C$525. For a return flight on this route, the best price is C$1,460. Depending on the availability and when you book, these fares could change.

  • To pick up cheap flight tickets from SAI to LHR, book as early as you can. Airlines usually offer their most competitively priced fares when flights are first released.

  • If you're willing to be flexible with your travel dates, try using the 'Whole month' search tool. It'll find the lowest price across each month when looking for a ticket from Siem Reap-Ankor International Airport to London Heathrow Airport.

  • Sign into your online account or use the app to create a Price Alert. We'll get in touch straight away if there's a better deal on this route. It's easy to do, and it'll save you time searching for cheap flight tickets from SAI to LHR every day.

  • Use filters to tailor your flights from Siem Reap-Ankor International Airport to London Heathrow Airport. Simply enter your ideal departure and arrival times, number of stops and airlines. Alternatively, sort your results by 'Cheapest' to see the best deals.

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

  • Siem Reap-Ankor International Airport is about 48 kilometres from central Siem Reap. If you're driving, ride-sharing or catching a cab from the center, it'll take you 59 minutes or so to arrive, depending on the traffic.

  • Spending the night in a hotel can take the hassle out of getting to the airport on time. If you want a place to stay before your flight from Siem Reap-Ankor International Airport to London Heathrow Airport, have a look at Chansor Community Homestay 18. It's a short drive from SAI.

Arriving at London Heathrow Airport (LHR)

Getting from London Heathrow Airport (LHR) to central London

  • From London Heathrow Airport, London is approximately 31 kilometres away. It takes around 57 minutes to get to the center driving.

  • If you're traveling by public transport, expect a journey time of about 1 hour and 1 minute.

When to fly to London Heathrow Airport (LHR)

  • It's time to work out your travel 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 low-key vibe, go in February.

  • The warmest month in London is July, with the temperature ranging between 11ºC and 26ºC. Book your flights from Siem Reap-Ankor International Airport to London Heathrow Airport in this month if this is the kind of weather you like.

  • January has average temperatures of between 0ºC and 9ºC. Look for cheap flight tickets from SAI to LHR sometime then if you like traveling in cooler conditions.

More about London

Complete your London trip with hotels and a car rental

  • You've got your cheap ticket to London Heathrow Airport — next up is finding a great place to stay, and maybe even your own set of wheels. We've compared prices across hundreds of companies to bring you the best hotels and car rental deals in London.

Plan the rest of your trip from Siem Reap to London

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