AirHint found the following cheapest return flights from Sydney (SYD) to Phnom-penh (PNH) in July 2025 (see full year).

Return flights

29 Jul - 05 Aug	Singapore Airlines
10 Jul - 03 Aug	AirAsia X
29 Jul - 24 Aug	Malaysia Airlines
26 Jul - 10 Aug	Singapore Airlines
26 Jul - 09 Aug	Singapore Airlines
19 Jul - 03 Aug	Singapore Airlines
24 Jul - 31 Jul	AirAsia X
29 Jul - 31 Jul	AirAsia X
22 Jul - 31 Jul	AirAsia X
30 Jul - 31 Jul	AirAsia X
17 Jul - 31 Jul	AirAsia X
10 Jul - 31 Jul	AirAsia X
24 Jul - 25 Jul	AirAsia X
26 Jul - 31 Jul	AirAsia X
23 Jul - 31 Jul	AirAsia X
19 Jul - 31 Jul	AirAsia X
24 Jul - 01 Aug	AirAsia X
29 Jul - 01 Aug	AirAsia X
22 Jul - 01 Aug	AirAsia X
30 Jul - 01 Aug	AirAsia X

Also check the deals for one-way flights from Sydney to Phnom-penh in July.

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 July from $485

Return flights