Cheapest return flights from Sydney to Colombo in September from $606

Best time to book flights for Sydney (SYD) to Colombo (CMB) flights at AirHint

AirHint found the following cheapest return flights from Sydney (SYD) to Colombo (CMB) in September 2025 (see full year).

Return flights

03 Sep - 10 Sep Singapore Airlines
23 Sep - 21 Oct Singapore Airlines
09 Sep - 10 Sep AirAsia X
10 Sep - 10 Oct Singapore Airlines
03 Sep - 11 Sep AirAsia X
10 Sep - 11 Sep AirAsia X
03 Sep - 21 Sep AirAsia X
10 Sep - 21 Sep AirAsia X
09 Sep - 11 Sep AirAsia X
23 Sep - 10 Oct AirAsia X
09 Sep - 21 Sep AirAsia X
25 Sep - 10 Oct AirAsia X
16 Sep - 21 Sep AirAsia X
23 Sep - 21 Oct SriLankan Airlines direct
15 Sep - 21 Sep AirAsia X
26 Sep - 10 Oct AirAsia X
26 Sep - 17 Oct AirAsia X

Also check the deals for one-way flights from Sydney to Colombo in September.

Skyscanner

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 Colombo

Cheap car rent in Colombo