Travelers have found it’s best to book a flight 35 days in advance to save up to 28% 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 35 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 London Heathrow Airport to Siem Reap 1-2 weeks in advance for as low as £846, or £1,013 for flights within the next 24 hours.
When flying from London Heathrow Airport to Siem Reap, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.
Due to multiple factors, expect to potentially pay more when booking in November. For low rates, October can be a great choice for travel to Siem Reap. Flights to Siem Reap from London Heathrow Airport in October are about £767 on average during October, but can be found for as low as £570.
Siem Reap (REP), located 4.6 mi from the city center, is the airport you fly into when you book flights from London Heathrow to Siem Reap. 5 airlines have flights to Siem Reap from London Heathrow on a regular basis. Booking flights from London Heathrow to Siem Reap should not be difficult; the airport handles an average of 0 inbound flights from London Heathrow per day.
Some of our airline partners flying from London Heathrow to Siem Reap have new flexible policies in place due to COVID-19. Singapore Airlines, China Southern, and Cathay Pacific are some of the carriers where you may find flexible cancellation policies. You can use our site to filter for airlines like Singapore Airlines with this kind of flexibility.
Yes, there are multiple flights from London Heathrow Airport to Siem Reap for under £800. The cheapest flight booked recently is on Singapore Airlines for just £712, but on average you can expect to pay £755.
There are currently 20+ open flights from London Heathrow Airport to Siem Reap within the next 7 days for less than £1,400.
Cheapflights users have booked flights from London Heathrow Airport to Siem Reap round-trip from £712. Another airline that can offer you cheap pricing is Vietnam Airlines. These flights start at 22% lower than the current average price 3 months from now.
The cheapest flight price from London Heathrow Airport to Siem Reap is £836. On average you can expect to pay £2,256. The most popular route, (London Heathrow - Siem Reap), can usually be booked for £722.
The most popular airlines flying from London Heathrow Airport to Siem Reap are Cathay Pacific, China Southern and China Eastern. Something to consider prior to booking your flight.
Information is based on travel restrictions from London Heathrow to Siem Reap
Most visitors from London Heathrow need to provide a negative COVID-19 test result and/or quarantine to enter Siem Reap.
COVID-19 testing requirements
Visitors from London Heathrow are not required to present a negative COVID-19 PCR test or antigen result upon entering Siem Reap.
Quarantine requirements
Visitors from London Heathrow are not required to quarantine after entering Siem Reap.
Returning to London Heathrow from Siem Reap
COVID-19 testing requirements
Visitors from Siem Reap are not required to present a negative COVID-19 PCR test or antigen result upon entering London Heathrow.
Quarantine requirements
Visitors from Siem Reap are not required to quarantine after entering London Heathrow.
Airline | Cheapest | Average | Flexibility | On-time | COVID-19 safety | |
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£375 | £608 | No cancel fee | 69% |
Search China Southern flights
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£561 | £720 | No cancel fee | 72% |
Search Cathay Pacific flights
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£662 | £750 | No cancel fee | 81% |
Search Singapore Airlines flights
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