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

Return flights

28 Jan - 28 Feb	Singapore Airlines
15 Jan - 19 Feb	Singapore Airlines
15 Jan - 21 Feb	Singapore Airlines
12 Jan - 08 Feb	Cathay Pacific
15 Jan - 31 Jan	AirAsia X
15 Jan - 27 Jan	AirAsia X
15 Jan - 03 Feb	AirAsia X
19 Jan - 24 Jan	Vietnam Airlines
17 Jan - 31 Jan	AirAsia X
22 Jan - 31 Jan	AirAsia X
10 Jan - 31 Jan	AirAsia X
17 Jan - 27 Jan	AirAsia X
22 Jan - 27 Jan	AirAsia X
22 Jan - 08 Feb	AirAsia X
10 Jan - 27 Jan	AirAsia X
17 Jan - 03 Feb	AirAsia X
22 Jan - 03 Feb	AirAsia X
10 Jan - 11 Jan	AirAsia X

Also check the deals for one-way flights from Sydney 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 Sydney to Phnom-penh in January from $554

Return flights