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

Return flights

04 Dec - 11 Dec	British Airways
07 Dec - 14 Dec	British Airways
29 Dec - 24 Jan	British Airways
12 Dec - 15 Dec	Spirit Airlines
02 Dec - 06 Dec	Spirit Airlines
10 Dec - 17 Dec	British Airways
14 Dec - 24 Dec	Finnair
24 Dec - 11 Jan	British Airways
16 Dec - 23 Dec	British Airways
13 Dec - 20 Dec	British Airways
23 Dec - 11 Jan	British Airways
22 Dec - 10 Jan	British Airways
22 Dec - 11 Jan	British Airways
21 Dec - 11 Jan	British Airways
29 Dec - 04 Jan	British Airways
27 Dec - 03 Jan	Aer Lingus
20 Dec - 02 Jan	Aer Lingus

Also check the deals for one-way flights from Indianapolis to London in December.

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 December from $582

Return flights