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

Return flights

03 Dec - 18 Dec	China Southern
05 Dec - 27 Dec	China Southern
08 Dec - 23 Dec	Singapore Airlines
29 Dec - 29 Jan	Jetstar
10 Dec - 31 Dec	Singapore Airlines
07 Dec - 31 Dec	Singapore Airlines
05 Dec - 31 Dec	China Southern
15 Dec - 24 Dec	China Southern
22 Dec - 11 Jan	Singapore Airlines
29 Dec - 22 Jan	Singapore Airlines
21 Dec - 13 Jan	Singapore Airlines
27 Dec - 03 Jan	Singapore Airlines
21 Dec - 10 Jan	Singapore Airlines
23 Dec - 04 Jan	China Southern
23 Dec - 03 Jan	Singapore Airlines

Also check the deals for one-way flights from Brisbane 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 Brisbane to Phnom-penh in December from 759€

Return flights