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

Return flights

09 Dec - 15 Dec	Delta
02 Dec - 09 Dec	British Airways
04 Dec - 11 Dec	British Airways
08 Dec - 15 Dec	British Airways
06 Dec - 13 Dec	British Airways
10 Dec - 17 Dec	British Airways
15 Dec - 22 Dec	British Airways
30 Dec - 06 Jan	British Airways
28 Dec - 17 Jan	KLM
12 Dec - 19 Dec	British Airways
15 Dec - 05 Jan	British Airways
18 Dec - 25 Dec	British Airways
24 Dec - 31 Dec	British Airways
22 Dec - 05 Jan	United
27 Dec - 03 Jan	British Airways

Also check the deals for one-way flights from Jacksonville 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 Jacksonville to London in December from 531€

Return flights