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

Return flights

22 Sep - 07 Oct	Ryanair
23 Sep - 07 Oct	Ryanair
01 Sep - 08 Sep	Ryanair
01 Sep - 11 Sep	Ryanair
01 Sep - 14 Sep	Ryanair
02 Sep - 08 Sep	Ryanair
25 Sep - 13 Oct	Ryanair
15 Sep - 21 Sep	Ryanair
10 Sep - 21 Sep	Ryanair
04 Sep - 21 Sep	Ryanair
15 Sep - 03 Oct	Ryanair
24 Sep - 08 Oct	Ryanair
27 Sep - 03 Oct	Ryanair
06 Sep - 21 Sep	Ryanair
07 Sep - 21 Sep	Ryanair
14 Sep - 21 Sep	Ryanair
03 Sep - 16 Oct	Ryanair
23 Sep - 03 Oct	Ryanair
24 Sep - 17 Oct	Ryanair
19 Sep - 04 Oct	Ryanair

Also check the deals for one-way flights from London 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 London to Osaka in September from 592€

Return flights