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

Return flights

29 Sep - 17 Oct	Wizz Air
25 Sep - 02 Oct	Wizz Air UK
29 Sep - 07 Oct	Wizz Air UK
27 Sep - 15 Oct	Wizz Air
28 Sep - 30 Oct	Wizz Air UK
30 Sep - 10 Oct	Wizz Air
29 Sep - 14 Oct	Wizz Air UK
25 Sep - 08 Oct	Wizz Air UK
27 Sep - 10 Oct	Wizz Air UK
30 Sep - 04 Oct	Wizz Air
22 Sep - 23 Sep	Wizz Air UK
22 Sep - 25 Sep	Wizz Air UK
24 Sep - 30 Sep	Wizz Air UK
23 Sep - 29 Sep	Wizz Air
24 Sep - 25 Sep	Wizz Air
26 Sep - 30 Sep	Wizz Air UK
22 Sep - 30 Sep	Ryanair
27 Sep - 30 Sep	Wizz Air UK
24 Sep - 28 Sep	Wizz Air UK
22 Sep - 27 Sep	easyJet

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 $399

Return flights