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

Return flights

26 Sep - 12 Oct	Hainan Airlines
26 Sep - 09 Oct	Hainan Airlines
24 Sep - 23 Oct	Hainan Airlines
24 Sep - 12 Oct	Hainan Airlines
24 Sep - 16 Oct	Hainan Airlines
24 Sep - 17 Oct	Shenzhen Airlines
22 Sep - 20 Oct	Etihad Airways
25 Sep - 02 Oct	China Eastern
22 Sep - 25 Sep	Etihad Airways
22 Sep - 06 Oct	Etihad Airways
30 Sep - 13 Oct	Etihad Airways
23 Sep - 29 Sep	Etihad Airways
22 Sep - 30 Sep	Etihad Airways
23 Sep - 30 Sep	Saudia
22 Sep - 29 Sep	Etihad Airways
24 Sep - 28 Sep	Saudia
19 Sep - 28 Sep	Etihad Airways
21 Sep - 24 Sep	Saudia
22 Sep - 24 Sep	Saudia
22 Sep - 27 Sep	Saudia

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 $568

Return flights