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

Return flights

25 Sep - 28 Sep	Etihad Airways
25 Sep - 30 Sep	Etihad Airways
26 Sep - 29 Sep	Etihad Airways
30 Sep - 07 Oct	SWISS
26 Sep - 28 Sep	Etihad Airways
26 Sep - 30 Sep	Etihad Airways
30 Sep - 21 Oct	SWISS
30 Sep - 29 Oct	Oman Air
30 Sep - 28 Oct	Oman Air
30 Sep - 14 Oct	Oman Air
27 Sep - 04 Oct	Etihad Airways
24 Sep - 30 Oct	Oman Air
23 Sep - 28 Oct	SWISS
23 Sep - 30 Sep	SWISS
28 Sep - 05 Oct	Etihad Airways
29 Sep - 20 Oct	SWISS
22 Sep - 29 Sep	Etihad Airways
27 Sep - 30 Sep	Etihad Airways
17 Sep - 22 Sep	Etihad Airways
22 Sep - 28 Sep	Etihad Airways

Also check the deals for one-way flights from Mumbai to London 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 Mumbai to London in September from 416€

Return flights