AirHint found the following cheapest return flights from Dublin (DUB) to Osaka (KIX) in September 2025 (see full year).

Return flights

03 Sep - 09 Sep	Ryanair
08 Sep - 15 Sep	Aer Lingus
02 Sep - 10 Sep	Ryanair
25 Sep - 14 Oct	Aer Lingus
10 Sep - 17 Sep	Ryanair
07 Sep - 15 Sep	Ryanair
06 Sep - 15 Sep	Ryanair
11 Sep - 17 Sep	Ryanair
12 Sep - 17 Sep	Ryanair
01 Sep - 05 Sep	Ryanair
25 Sep - 09 Oct	Ryanair
01 Sep - 15 Sep	Aer Lingus
26 Sep - 07 Oct	Ryanair
27 Sep - 11 Oct	Ryanair
18 Sep - 04 Oct	Hainan Airlines

Also check the deals for one-way flights from Dublin to Osaka 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 Dublin to Osaka in September from 599€

Return flights