LHR - REP
£512 - £794
High demand for flights, 22% potential price rise
Best time to find cheap flights, 17% potential price drop
Average for round-trip flights in October 2020
From Heathrow to Siem Reap
Users have found that leaving on a Monday can be a cost-effective option. It’s possible to save up to 14% on your flight compared to booking on days when demand is much higher.
Travellers have found it’s best to book a flight 58 days in advance to save up to 6% compared to booking the same week of travel. As your travel date approaches, the cost of this flight route may potentially increase. While opting to book 58 days out may not be an option for all, there are still additional ways to secure a deal in the near future. You might find a flight from Heathrow to Siem Reap 1-2 weeks in advance for as low as £611, or £611 for flights within the next 24 hours.
Flights from Heathrow to Siem Reap lean towards being more expensive in December. Prices are generally better when you fly from Heathrow to Siem Reap in September, with the cheapest ticket starting at £333.
It’s optimal to fly from Heathrow to Siem Reap in the morning. By choosing this option you can save up to 6% on the cost of your flight, compared to a flight in the afternoon.
At this time, Cheapflights has noticed price decreases for many domestic flights due to COVID-19. Travel is not necessarily recommended at this time, and flights may be prone to cancellation: please check with local authorities in both Heathrow and Siem Reap for travel alerts, and be sure to review the airline's cancellation policy and travel advisories before booking. For more information, please view our post on what to know about COVID-19 (coronavirus) and travel.
Some of our airline partners flying from London Heathrow to Siem Reap have new flexible policies in place due to COVID-19. China Southern, Cathay Pacific, and Qatar Airways are some of the carriers where you may find flexible cancellation policies. You can use our site to filter for airlines like China Southern with this kind of flexibility.
Yes, there are multiple flights from Heathrow to Siem Reap for under £768. The cheapest flight booked recently is on Multiple Airlines for just £742, but on average you can expect to pay £1,130.
There are no direct flights from Heathrow to Siem Reap, but Cheapflights can provide you with all the information you need to find the fastest route with the fewest stops.
Airlines like Vietnam Airlines fly from Heathrow to Siem Reap in about 23h 30m. The time it takes to get you to your destination can typically vary by up to .
Our cheapest airline available from Heathrow to Siem Reap is Vietnam Airlines. Our recent data shows that you can find tickets from as low as £757 on this airline.