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	SunExpress
27 Sep - 27 Oct	SunExpress
22 Sep - 29 Sep	AJet
30 Sep - 07 Oct	Ryanair
25 Sep - 29 Sep	Pegasus Airlines
28 Sep - 07 Oct	SunExpress
21 Sep - 28 Sep	Pegasus Airlines
26 Sep - 01 Oct	SunExpress
21 Sep - 16 Oct	SunExpress
30 Sep - 08 Oct	SunExpress
27 Sep - 08 Oct	SunExpress
18 Sep - 23 Sep	Pegasus Airlines
25 Sep - 01 Oct	Pegasus Airlines
23 Sep - 27 Sep	Ryanair
20 Sep - 04 Oct	SunExpress
23 Sep - 30 Sep	Ryanair
19 Sep - 25 Sep	Pegasus Airlines
20 Sep - 28 Sep	AJet
19 Sep - 22 Sep	Pegasus Airlines
21 Sep - 30 Sep	Ryanair

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 $622

Return flights