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

Return flights

28 Mar - 08 Apr	Air China
03 Mar - 16 Mar	SWISS
02 Mar - 17 Mar	SWISS
03 Mar - 18 Mar	SWISS
02 Mar - 18 Mar	SWISS
04 Mar - 24 Mar	Singapore Airlines
12 Mar - 26 Mar	SWISS
03 Mar - 17 Mar	Singapore Airlines
13 Mar - 26 Mar	Singapore Airlines
13 Mar - 25 Mar	Singapore Airlines
18 Mar - 31 Mar	Singapore Airlines
17 Mar - 21 Apr	SWISS
30 Mar - 17 Apr	SWISS
28 Mar - 21 Apr	Vueling Airlines
27 Mar - 14 Apr	Vueling Airlines
28 Mar - 19 Apr	Vueling Airlines
19 Mar - 11 Apr	Singapore Airlines

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

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 March from 574€

Return flights