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Live fares to Phnom Penh load the moment you search. In the meantime, here is what to know about flying to Phnom Penh from London.
Average daytime temperature and monthly rainfall across the year, so you can pick the best time to fly. Source: long-term climate normals.
Average temperature (°C)
Average rainfall (mm)
Fares shown are indicative estimates. Search for live prices and availability to Phnom Penh.
Search live faresSaturday
Thunderstorm
33°C
17/10/2026
Sunday
Rain
31°C
18/10/2026
Monday
Thunderstorm
32°C
19/10/2026
Tuesday
Thunderstorm
32°C
20/10/2026
Wednesday
Light rain
32°C
21/10/2026
Thursday
Light rain
31°C
22/10/2026
Friday
Thunderstorm
31°C
23/10/2026
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Cambodia's riverside capital rewards travellers who linger. Phnom Penh pairs golden-spired temples and French-colonial streets with a fast-growing café and gallery scene, set where the Mekong and Tonlé Sap rivers meet. There are no direct flights from the UK, so every routing involves at least one change. Use the price charts on this page to see how fares move through the year, and read on for cheap flights to Phnom Penh advice from our team.
The cool, dry season from November to February is the most comfortable time to visit, and the busiest around Christmas and New Year. March to May turns very hot. The wet season, roughly June to October, brings short afternoon downpours rather than all-day rain, along with greener scenery and softer fares; May and October are good-value shoulder months. Check the When to book chart above before fixing your dates.
No airline flies non-stop between the UK and Phnom Penh, so you'll connect through a hub. Qatar Airways (via Doha) offers one of the smoothest one-stop options from Heathrow, Gatwick, Manchester, Birmingham and Edinburgh. Singapore Airlines (via Singapore), Thai Airways (via Bangkok), Vietnam Airlines (via Ho Chi Minh City or Hanoi), Malaysia Airlines (via Kuala Lumpur) and Cathay Pacific (via Hong Kong) are all reliable alternatives. Expect around 15 to 18 hours from London including the layover, and a little more from Manchester.
The highlights range from moving history to easy riverside wandering:
Phnom Penh is served by the new Techo International Airport, opened in 2025 about 20km south of the city and replacing the older airport near the centre. Allow roughly 45 minutes to an hour by road. Licensed airport taxis and ride-hailing apps such as Grab and PassApp are the easiest way in; carry small notes, and ask your hotel about a pick-up if you send your flight details ahead.
UK passport holders need a tourist visa, most easily arranged as an official e-visa before travel or obtained on arrival at the airport; your passport should be valid for at least six months. The currency is the Cambodian riel, but US dollars are used almost everywhere and ATMs mainly dispense them, so carry clean, undamaged notes and expect change in riel. No vaccinations are required for entry from the UK, but check NHS TravelHealthPro for recommended jabs and read current FCDO advice before you travel with comprehensive insurance.
Your allowance to Phnom Penh depends on the airline and the fare you book. The table below shows typical long-haul allowances so you know roughly what to expect — always confirm the exact limits with your airline before you fly.
| Fare type | Hand baggage | Checked baggage |
|---|---|---|
| Basic / Light economy | 1 small under-seat bag | Usually none — add for a fee |
| Standard economy | 1 cabin bag + 1 personal item | Typically 1 × 23 kg |
| Premium economy | 1–2 cabin bags + personal item | Typically 2 × 23 kg |
| Business / First | 2 cabin bags + personal item | Typically 2 × 32 kg |
Indicative only. Allowances vary by airline, route and fare — always check your airline's baggage policy.
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