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

Return flights

23 Sep - 29 Oct	Ryanair
23 Sep - 28 Oct	Ryanair
25 Sep - 02 Oct	Jet2
23 Sep - 07 Oct	AJet
25 Sep - 25 Oct	AJet
23 Sep - 04 Oct	Ryanair
23 Sep - 15 Oct	Ryanair
30 Sep - 04 Oct	Ryanair
27 Sep - 17 Oct	Ryanair
28 Sep - 07 Oct	Pegasus Airlines
26 Sep - 30 Sep	Pegasus Airlines
25 Sep - 28 Sep	Pegasus Airlines
27 Sep - 29 Sep	SunExpress
23 Sep - 27 Sep	Pegasus Airlines
24 Sep - 27 Sep	Pegasus Airlines
24 Sep - 28 Sep	Emirates
23 Sep - 28 Sep	Emirates

Also check the deals for one-way flights from London to Jakarta 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 Jakarta in September from 528€

Return flights