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

Return flights

08 Sep - 30 Sep	SWISS
09 Sep - 24 Sep	IndiGo
09 Sep - 29 Sep	IndiGo
22 Sep - 23 Oct	Royal Jordanian
15 Sep - 18 Sep	Royal Jordanian
08 Sep - 23 Sep	Royal Jordanian
18 Sep - 25 Sep	Royal Jordanian
25 Sep - 05 Oct	Royal Jordanian
18 Sep - 22 Sep	SWISS
18 Sep - 24 Sep	SWISS
18 Sep - 07 Oct	SWISS
16 Sep - 23 Sep	Lufthansa
12 Sep - 16 Sep	Lufthansa
24 Sep - 22 Oct	SWISS
16 Sep - 01 Oct	Lufthansa
23 Sep - 22 Oct	SWISS
25 Sep - 07 Oct	SWISS
10 Sep - 06 Oct	Etihad Airways
12 Sep - 05 Oct	Etihad Airways
16 Sep - 05 Oct	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 357€

Return flights