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

Return flights

07 Dec - 10 Dec	Scandinavian Airlines
15 Dec - 18 Dec	jetBlue
12 Dec - 21 Dec	Air Canada
14 Dec - 19 Dec	jetBlue
23 Dec - 31 Dec	British Airways
14 Dec - 20 Dec	Delta
21 Dec - 05 Jan	British Airways
20 Dec - 05 Jan	Air Canada
20 Dec - 27 Dec	United
19 Dec - 05 Jan	Air Canada
29 Dec - 02 Jan	Allegiant Air
29 Dec - 03 Jan	jetBlue

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 $760

Return flights