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

Return flights

11 Dec - 16 Dec	Allegiant Air
02 Dec - 07 Dec	Frontier Airlines
01 Dec - 05 Dec	Aer Lingus
01 Dec - 07 Dec	Allegiant Air
07 Dec - 10 Dec	Frontier Airlines
01 Dec - 08 Dec	Allegiant Air
22 Dec - 14 Jan	Frontier Airlines
05 Dec - 08 Dec	Allegiant Air
10 Dec - 07 Jan	Frontier Airlines
12 Dec - 17 Dec	Frontier Airlines
24 Dec - 28 Dec	Frontier Airlines
23 Dec - 04 Jan	Frontier Airlines
19 Dec - 27 Dec	Frontier Airlines
24 Dec - 03 Jan	Frontier Airlines
26 Dec - 02 Jan	Frontier Airlines
29 Dec - 03 Jan	Frontier Airlines
26 Dec - 03 Jan	Allegiant Air

Also check the deals for one-way flights from Cincinnati 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 Cincinnati to London in December from $792

Return flights