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

Return flights

22 Oct - 07 Nov	Air Canada
08 Oct - 15 Oct	Air Canada
24 Oct - 16 Nov	United
15 Oct - 22 Oct	United
20 Oct - 27 Oct	United
22 Oct - 08 Nov	Aer Lingus
12 Oct - 23 Oct	British Airways
12 Oct - 20 Oct	United
25 Oct - 01 Nov	United
30 Oct - 06 Nov	United
10 Oct - 17 Oct	United
05 Oct - 12 Oct	United
02 Oct - 09 Oct	British Airways
20 Oct - 24 Oct	Spirit Airlines
20 Oct - 23 Oct	Delta

Also check the deals for one-way flights from Indianapolis to London 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 Indianapolis to London in October from 415€

Return flights