AirHint found the following cheapest return flights from London (LHR) to Phnom-penh (PNH) in January 2026 (see full year).

Return flights

06 Jan - 02 Feb	Air China
05 Jan - 05 Feb	Air China
28 Jan - 28 Feb	Air China
30 Jan - 06 Feb	Air China
06 Jan - 05 Feb	Air China
28 Jan - 14 Feb	Etihad Airways
04 Jan - 28 Jan	Air China
17 Jan - 24 Jan	Etihad Airways
16 Jan - 24 Jan	Etihad Airways
16 Jan - 30 Jan	Etihad Airways
18 Jan - 30 Jan	Etihad Airways
11 Jan - 22 Jan	Etihad Airways
11 Jan - 31 Jan	Etihad Airways
14 Jan - 24 Jan	China Southern
16 Jan - 25 Jan	China Southern
04 Jan - 18 Jan	China Southern

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

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 January from $666

Return flights