AirHint found the following cheapest return flights from London (STN) to Phnom-penh (PNH) in December 2025 (see full year).

Return flights

01 Dec - 13 Dec	Ryanair
05 Dec - 15 Dec	Ryanair
11 Dec - 25 Dec	Ryanair
29 Dec - 13 Jan	Ryanair
04 Dec - 23 Dec	Ryanair
01 Dec - 15 Dec	Emirates
01 Dec - 08 Dec	Emirates
08 Dec - 20 Dec	Ryanair
13 Dec - 20 Dec	Ryanair
20 Dec - 01 Jan	Ryanair
09 Dec - 31 Dec	Emirates
11 Dec - 20 Jan	Emirates
20 Dec - 06 Jan	Ryanair
10 Dec - 31 Dec	Emirates
18 Dec - 04 Jan	Ryanair
28 Dec - 22 Jan	Emirates
19 Dec - 02 Jan	Ryanair
20 Dec - 04 Jan	Ryanair
18 Dec - 02 Jan	Ryanair
20 Dec - 10 Jan	Ryanair

Also check the deals for one-way flights from London to Phnom-penh in December.

The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

Book a cheap hotel in Phnom-penh

Cheap car rent in Phnom-penh

Cheapest return flights from London to Phnom-penh in December from 800€

Return flights