Cheapest return flights from Atlanta to London in December from $450

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

Return flights

05 Dec - 11 Jan Frontier Airlines
06 Dec - 10 Jan Frontier Airlines
05 Dec - 30 Jan Frontier Airlines
02 Dec - 14 Dec Frontier Airlines
05 Dec - 11 Dec Frontier Airlines
05 Dec - 10 Jan Frontier Airlines
06 Dec - 12 Dec Frontier Airlines
02 Dec - 09 Dec Frontier Airlines
13 Dec - 10 Jan Spirit Airlines
05 Dec - 10 Dec Frontier Airlines
12 Dec - 08 Jan Spirit Airlines
03 Dec - 11 Dec Spirit Airlines
04 Dec - 14 Dec Frontier Airlines
02 Dec - 08 Dec Frontier Airlines
04 Dec - 10 Jan Frontier Airlines
02 Dec - 05 Dec Spirit Airlines
01 Dec - 05 Dec Frontier Airlines
15 Dec - 13 Jan Frontier Airlines
15 Dec - 12 Jan Frontier Airlines
15 Dec - 10 Jan Spirit Airlines

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

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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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