AirHint found the following cheapest return flights from London (LHR) to Mumbai (BOM) in September 2026 (see full year).

Return flights

08 Sep - 22 Sep	Air India
23 Sep - 30 Sep	Air India
09 Sep - 30 Sep	Air India
09 Sep - 24 Sep	Air India
16 Sep - 23 Sep	Air India
02 Sep - 22 Sep	Air India
01 Sep - 01 Oct	Air India
10 Sep - 01 Oct	Air India
14 Sep - 30 Sep	Air India
03 Sep - 22 Sep	Air India
10 Sep - 24 Sep	Air India
01 Sep - 22 Sep	Air India
23 Sep - 12 Oct	Air India
17 Sep - 01 Oct	Air India
24 Sep - 22 Oct	Air India
10 Sep - 17 Oct	Air India
25 Sep - 20 Oct	Air India
15 Sep - 27 Oct	Etihad Airways
13 Sep - 04 Oct	Air India
19 Sep - 18 Oct	Air India

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 435€

Return flights