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Cheap flights from London Heathrow to Siem Reap

Q: How much are flights normally?

£ 525. If you see flights from London Heathrow to Siem Reap for less than this, you've found a good deal.

Q: When is the best time to book cheap flights?

20 weeks. If you want cheap flights from London Heathrow to Siem Reap, this is the best time to book.

Q: What are the cheapest airlines?

Austrian Airlines, Singapore Airlines. These airlines usually offer the cheapest flights from London Heathrow to Siem Reap.

Q: What airlines fly indirectly?

Lufthansa, SWISS, Singapore Airlines, Turkish Airlines, Austrian Airlines. These airlines fly from London Heathrow to Siem Reap, but you’ll have at least one layover.

Q: When is high season?

December. This is the most expensive time to fly to Siem Reap. If this is when you want to go, book your flight from London Heathrow in advance.

Q: When is the cheapest time to fly?

May. Flights from London Heathrow to Siem Reap are usually cheaper at this time of year.

Q: How long is the flight?

14 hrs 10 mins. This is the shortest flight time from London Heathrow to Siem Reap.

Q: How long should I stay in Siem Reap?

15 days. Most people spend this amount of time in Siem Reap.

from as little as £744

32 nights in Siem Reap, departing London Heathrow on 05 / Sep / 2023 with Singapore Airlines (price found 8 hours ago)

Subject to availability, prices correct of the last 24 hours

Cheap return flights from London Heathrow to Siem Reap

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The London Heathrow / Siem Reap route

All 9811 km of it

Cheap flight deals for this route

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Siem Reap flight facts

What you need to know

How much are flights normally?

£ 525

If you see flights from London Heathrow to Siem Reap for less than this, you've found a good deal.

When is the best time to book cheap flights?

20 weeks

If you want cheap flights from London Heathrow to Siem Reap, this is the best time to book.

What are the cheapest airlines?

Austrian Airlines
Singapore Airlines

These airlines usually offer the cheapest flights from London Heathrow to Siem Reap.

What airlines fly indirectly?

Lufthansa
SWISS
Singapore Airlines
Turkish Airlines
Austrian Airlines

These airlines fly from London Heathrow to Siem Reap, but you’ll have at least one layover.

When is high season?

December

This is the most expensive time to fly to Siem Reap. If this is when you want to go, book your flight from London Heathrow in advance.

When is the cheapest time to fly?

Flights from London Heathrow to Siem Reap are usually cheaper at this time of year.

How long is the flight?

14 hrs 10 mins

This is the shortest flight time from London Heathrow to Siem Reap.

How long should I stay in Siem Reap?

15 days

Most people spend this amount of time in Siem Reap.

Alternative flights from the UK to Siem Reap

Check out prices for other routes

London to Siem Reap

from £744 pp

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Manchester to Siem Reap

from £950 pp

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Edinburgh to Siem Reap

from £974 pp

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Birmingham to Siem Reap

from £1,012 pp

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London City Airport to Siem Reap

from £1,196 pp

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London Gatwick to Siem Reap

from £1,015 pp

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London Luton to Siem Reap

search for price

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London Stansted to Siem Reap

from £982 pp

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Alternative flights from London Heathrow

You might find cheaper flights nearby

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Bangkok from London Heathrow

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Ho Chi Minh from London Heathrow

from £708 pp

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Koh Samui from London Heathrow

from £805 pp

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Phuket from London Heathrow

from £650 pp

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Hanoi from London Heathrow

from £718 pp

Find flights

Today alone, Netflights has searched over 1,029 flights. 05 / Sep / 2023 is currently the lowest priced day of the year to fly the London Heathrow/Siem Reap route. There are around 197 flights on any given week from the UK to Siem Reap and the cheapest month to fly right now is September.

Min / Max Temperature (°C)

LOWEST

19 °C

AVG

26 °C

HIGHEST

34 °C

Rainfall (mm)

LOWEST

0 mm

AVG

109.2 mm

HIGHEST

239 mm

Key facts about Siem Reap

Currency

Cambodian riel

United States dollar

Language

Khmer

Timezone

7 hrs ahead of GMT

How to get cheap flights from London Heathrow to Siem Reap

Tips and advice from our flight experts

Search for cheap flights and last-minute deals with Netflights. We've scanned all the flights from London Heathrow to Siem Reap, across the nine airlines that offer this route. We've found that 05 / Sep / 2023 is the cheapest date to travel at the moment, but it's best to go through the results to see which flight suits you.

There are 197 flights from London Heathrow to or via Siem Reap every week. Out of the nine available airlines, the most popular ones are Lufthansa, SWISS & Singapore Airlines. But that doesn’t necessarily mean they’ll be the best option for your travel dates. To see as many flights as possible, try widening your search to include other departure airports.

The distance between London Heathrow to Siem Reap is 9811 km. Normally, it takes about 18 hrs 15 mins to fly, and you can definitely expect the journey to be at least 14 hrs 10 mins. You can see the various flight times in the results.

The cheapest month to fly to Siem Reap is May, while December is when the prices of flights, hotels and car hire will be at their highest. If you need somewhere to stay for your trip to Cambodia, take a look at our accommodation options.