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Flights to Siem Reap from London

Cheap flights from London to Siem Reap from £589. London (United Kingdom) - Siem Reap (Cambodia) return flights from £812. From 19/11/2026 (Thursday) - 23/11/2026 (Monday). Check for the dates with the lowest prices and find the cheapest rates.

Round-trip flights from London to Siem Reap

Cheapest round-trip flights from London to Siem Reap

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Cheap flights from London Heathrow Airport to Siem Reap

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Cheap flights from Gatwick to Siem Reap

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Cheap flights from London Stansted Airport to Siem Reap

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More information about flights to Siem Reap from London

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FAQs London to Siem Reap flights

FAQs

  • Can I combine different airlines on the same trip?

    Of course. We offer you the possibility of booking with more than 400 airlines so that you can find the cheapest fare or the most convenient combination: outbound flight with one airline and return flight with another.

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    In 1998, lastminute.com was one of the first online travel agencies. Currently, we are selling over 380,000 flights per year – and working hard on bringing travellers wherever they want to go.

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    lastminute.com offers flexibility services for purchase at the time of your booking. These services entitle you to change or cancel your flights without handling fee.*

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  • How long does a flight take between London and Siem Reap?

    The flight from London to Siem Reap has a duration of 20h 42m.

  • What are the cheapest flights from London to Siem Reap?

    The cheapest one-way flight costs £589 flying with Etihad Airways and the cheapest return flight costs £812 with Vietnam Airlines.

  • How many airports are there in the city of London?

    London has 5 airport: LON - All airports, London Heathrow Airport, Gatwick, London City Airport, London Stansted Airport.

  • How many airports does Siem Reap have?

    There are 2 airports in Siem Reap: Siem Reap-Angkor International Airport, Angkor International

  • Which Siem Reap airport is the most central?

    The most central airport is Angkor International, 6.3km.

  • Schedules of the first and last flight from London to Siem Reap

    The first flight from London to Siem Reap is at 09:00 and the last flight departs at 09:00.