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

Return flights

23 Sep - 12 Oct	KLM
23 Sep - 30 Sep	KLM
23 Sep - 14 Oct	KLM
23 Sep - 06 Oct	KLM
17 Sep - 30 Sep	KLM
16 Sep - 30 Sep	KLM
24 Sep - 30 Sep	KLM
16 Sep - 21 Oct	KLM
16 Sep - 02 Oct	KLM
29 Sep - 13 Oct	KLM
29 Sep - 23 Oct	KLM
16 Sep - 14 Oct	KLM
24 Sep - 23 Oct	KLM
20 Sep - 30 Sep	KLM
19 Sep - 30 Sep	KLM
26 Sep - 12 Oct	KLM
15 Sep - 28 Sep	KLM
14 Sep - 29 Sep	KLM
15 Sep - 29 Sep	KLM
17 Sep - 28 Sep	KLM

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.

Book a cheap hotel in Jakarta

Cheap car rent in Jakarta

Cheapest return flights from London to Jakarta in September from 619€

Return flights