AirHint found the following cheapest return flights from Brussels (BRU) to Phnom-penh (PNH) in September 2025 (see full year).

Return flights

16 Sep - 30 Sep	Qatar Airways
18 Sep - 28 Sep	Qatar Airways
13 Sep - 26 Sep	Lufthansa
15 Sep - 28 Sep	Qatar Airways
13 Sep - 08 Oct	Qatar Airways
19 Sep - 27 Sep	Qatar Airways
02 Sep - 19 Sep	Emirates
05 Sep - 25 Sep	Qatar Airways
19 Sep - 26 Sep	Emirates

Also check the deals for one-way flights from Brussels to Phnom-penh in September.

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.

Book a cheap hotel in Phnom-penh

Cheap car rent in Phnom-penh

Cheapest return flights from Brussels to Phnom-penh in September from $816

Return flights