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

Return flights

11 Dec - 27 Dec	Breeze Airways
14 Dec - 20 Dec	Breeze Airways
21 Dec - 29 Dec	Allegiant Air
14 Dec - 19 Dec	Breeze Airways
15 Dec - 27 Dec	British Airways
21 Dec - 04 Jan	Allegiant Air
22 Dec - 05 Jan	Frontier Airlines
18 Dec - 05 Jan	Allegiant Air
20 Dec - 04 Jan	Frontier Airlines
18 Dec - 04 Jan	Allegiant Air
22 Dec - 04 Jan	Frontier Airlines
19 Dec - 04 Jan	Frontier Airlines
30 Dec - 02 Jan	Allegiant Air

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.

Book a cheap hotel in London

Cheap car rent in London

Cheapest return flights from Jacksonville to London in December from $1030

Return flights