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

Return flights

02 Dec - 09 Dec	Wizz Air UK
02 Dec - 14 Jan	Wizz Air UK
02 Dec - 15 Dec	Wizz Air UK
06 Dec - 14 Dec	Vueling Airlines
05 Dec - 30 Dec	Wizz Air UK
01 Dec - 14 Dec	easyJet
12 Dec - 26 Dec	SKY express
01 Dec - 10 Dec	easyJet
01 Dec - 25 Dec	easyJet
26 Dec - 11 Jan	China Southern
27 Dec - 24 Jan	Air China
26 Dec - 06 Jan	Air China
26 Dec - 09 Jan	Air China
16 Dec - 30 Dec	Wizz Air UK
27 Dec - 07 Jan	Wizz Air UK
25 Dec - 06 Jan	China Southern
17 Dec - 14 Jan	easyJet
29 Dec - 05 Jan	Air China
27 Dec - 10 Jan	Air China
15 Dec - 27 Dec	easyJet

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.

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Cheapest return flights from London to Phnom-penh in December from 603€

Return flights