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

Return flights

01 Dec - 25 Dec	Wizz Air UK
01 Dec - 10 Dec	Wizz Air UK
12 Dec - 26 Dec	Wizz Air UK
05 Dec - 30 Dec	Wizz Air UK
17 Dec - 14 Jan	Wizz Air UK
01 Dec - 03 Jan	Wizz Air UK
27 Dec - 07 Jan	Wizz Air UK
27 Dec - 10 Jan	Wizz Air UK
29 Dec - 05 Jan	Wizz Air UK
17 Dec - 31 Dec	Wizz Air UK
24 Dec - 03 Jan	easyJet
22 Dec - 07 Jan	easyJet
17 Dec - 04 Jan	Wizz Air UK
16 Dec - 30 Dec	easyJet
26 Dec - 06 Jan	Wizz Air
19 Dec - 17 Jan	easyJet
20 Dec - 31 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 707€

Return flights