Cheap flights from Phnom Penh to London Heathrow from £758

from as little as £758

35 nights in London, departing Phnom Penh on 12 / Dec / 2025 with Etihad Airways (price found 36 hours ago)

Subject to availability, prices correct of the last 24 hours
London Heathrow

The Phnom Penh / London Heathrow route

All 10044 km of it

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London Heathrow flight facts

What you need to know

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London Heathrow

12 / Dec / 2025 is currently the lowest priced day of the year to fly the Phnom Penh/London Heathrow route. There are around 104 flights on any given week from the UK to London Heathrow and the cheapest month to fly right now is December.

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Min / Max Temperature (°C)
LOWEST

2 °C

AVG

11 °C

HIGHEST

24 °C

Rainfall (mm)
LOWEST

38.1 mm

AVG

52.5 mm

HIGHEST

66 mm

Key facts about London Heathrow

How to get cheap flights from Phnom Penh to London Heathrow

Tips and advice from our flight experts

There are nine airlines offering flights to London. The most direct route isn’t necessarily the cheapest – being flexible is key to finding the lowest airfare rates. For example, try searching by month to see the best time of the week to fly. The cheapest date is currently 12 / Dec / 2025.

London Heathrow is just one of the airports in London. If you're not set on a specific airport, try changing your search from London Heathrow to London to see a broader range of flights – they might be cheaper. It usually takes about 17 hrs 50 mins to fly 10044 km to London Heathrow.

There are about 104 flights to or via London every week, so you have plenty of options. Keep your eye out for flights with Thai Airways International, Qatar Airways and Emirates – these are the most popular airlines for flying to .

During this peak season, hotel and holiday prices often increase too, so it's best to book early. Or you could keep your fingers crossed and hold out for a last-minute deal.

Other popular destinations near London Heathrow

Where other people are flying to

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