Cheap flights from London to Phnom Penh

Fares on this route come down in September, the cheapest month in the price calendar, and the calendar runs from September through July, so flexible dates are worth starting there. Autumn and the early months of the year usually hold up better than the middle of summer, when UK school holidays push the whole route up. Midweek departures tend to give you more connections to choose from than weekend ones. If your trip overlaps a public holiday in Cambodia or in the UK, book earlier rather than later, and leave room in your plans for the long haul in each direction.

No airline flies London to Phnom Penh non-stop, so every option here is a connecting itinerary. AirAsiaX Sdn Bhd is the low-cost name in the list; Shenzhen Airlines, China Southern Airlines, China Eastern Airlines, Xiamen Airlines, Qatar Airways, Swiss, Turkish Airlines, Cathay Pacific and Thai Airways Intl are full-service carriers. Where you change planes shapes the trip — routing through China, the Gulf or Southeast Asia gives you different connection times and different transfer airports. Baggage allowances and change rules differ between the low-cost and full-service fares, so read the conditions on the exact ticket you pick instead of assuming they match.

Techo is the airport you land at in Phnom Penh, and it sits outside the city rather than in it, so plan on a road transfer at the end of a long journey. Taxis and ride-hailing apps are the usual ways into town, and tuk-tuks work well for lighter bags and daytime arrivals. Agree the fare before you set off if you take a taxi from the rank, or book through an app so the amount is settled in advance. After a connection or two you will be tired, so have your hotel address saved offline and in Khmer script as well as English. Allow buffer time if you land late at night.

Currency

KHR (៛)

Power sockets

Type A, C, G · 230 V

Language

Khmer

Emergency number

117, 118, 119

Driving side

right

Calling code

+855

Internet domain

.kh

Time zone

UTC+07 (Asia/Phnom_Penh)

Country facts: Wikidata

• Check which London airport your fare leaves from, because London City, Gatwick, Heathrow, Luton and Stansted are not interchangeable.
• Confirm the baggage allowance on your exact fare, particularly with the low-cost option.
• If you are booking separate tickets for each leg, leave a generous gap at the connecting airport.
• Check Cambodia's entry and visa rules before you pay for anything.
• Compare total journey time as well as the fare, since every itinerary here stops at least once.
• Look at the price calendar before you lock in dates, as September is the cheapest month on this route.