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

Return flights

17 Sep - 22 Sep	SriLankan Airlines
08 Sep - 22 Sep	SriLankan Airlines
10 Sep - 17 Sep	SriLankan Airlines
05 Sep - 12 Sep	SriLankan Airlines
01 Sep - 09 Sep	ANA
17 Sep - 23 Sep	ANA
28 Sep - 05 Oct	ANA
02 Sep - 09 Sep	ANA
02 Sep - 08 Sep	ANA
07 Sep - 22 Sep	ANA

Also check the deals for one-way flights from Osaka to Colombo 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.

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Cheapest return flights from Osaka to Colombo in September from $987

Return flights