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

Return flights

11 Sep - 23 Sep	KLM
08 Sep - 24 Sep	KLM
10 Sep - 30 Sep	KLM
08 Sep - 29 Sep	KLM
04 Sep - 30 Sep	KLM
18 Sep - 29 Sep	KLM
24 Sep - 29 Sep	KLM
11 Sep - 06 Oct	KLM
15 Sep - 06 Oct	KLM
16 Sep - 06 Oct	KLM
23 Sep - 14 Oct	KLM
17 Sep - 08 Oct	KLM
30 Sep - 06 Oct	KLM
17 Sep - 21 Oct	KLM
25 Sep - 02 Oct	KLM
15 Sep - 07 Oct	KLM
10 Sep - 08 Oct	KLM
03 Sep - 23 Sep	KLM
15 Sep - 30 Sep	KLM
01 Sep - 29 Sep	KLM

Also check the deals for one-way flights from London to Bangalore 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 Bangalore in September from $513

Return flights