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

Return flights

23 Oct - 07 Nov	SWISS
23 Oct - 19 Nov	SWISS
23 Oct - 08 Nov	SWISS
20 Oct - 27 Oct	Air India
13 Oct - 20 Oct	Air India
13 Oct - 25 Nov	Air India
27 Oct - 04 Nov	Air India
08 Oct - 19 Oct	Air India
07 Oct - 20 Oct	Air India
07 Oct - 30 Oct	Air India
21 Oct - 04 Nov	Air India
22 Oct - 05 Nov	Air India
22 Oct - 10 Nov	Air India
30 Oct - 03 Nov	Air India
23 Oct - 25 Nov	Air India
20 Oct - 30 Oct	Air India
21 Oct - 27 Oct	Air India
07 Oct - 14 Oct	Air India
07 Oct - 27 Oct	Air India
16 Oct - 28 Oct	Air India

Also check the deals for one-way flights from London to Mumbai in October.

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 October from 399€

Return flights