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

Return flights

23 Sep - 27 Sep	Saudia
21 Sep - 29 Sep	Saudia
23 Sep - 28 Sep	Saudia
16 Sep - 25 Sep	Saudia
16 Sep - 26 Sep	Saudia
07 Sep - 23 Sep	Saudia
04 Sep - 27 Sep	Saudia
07 Sep - 24 Sep	Saudia
19 Sep - 23 Sep	Saudia
09 Sep - 29 Sep	Saudia
18 Sep - 04 Oct	Saudia
11 Sep - 04 Oct	Saudia
20 Sep - 22 Oct	Saudia
21 Sep - 07 Oct	Saudia
30 Sep - 24 Oct	Saudia
21 Sep - 10 Oct	Saudia
28 Sep - 06 Oct	Saudia
11 Sep - 10 Oct	Saudia
07 Sep - 03 Oct	Saudia
23 Sep - 01 Oct	Saudia

Also check the deals for one-way flights from London to Mumbai 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 Mumbai in September from 393€

Return flights