Cheapest return flights from Atlanta to Keflavik in December from 641€

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

Return flights

04 Dec - 11 Dec Spirit Airlines
07 Dec - 13 Dec Frontier Airlines
05 Dec - 08 Dec Frontier Airlines
05 Dec - 07 Dec Frontier Airlines
14 Dec - 28 Dec Frontier Airlines
16 Dec - 27 Dec Frontier Airlines
20 Dec - 28 Dec Frontier Airlines
19 Dec - 27 Dec Spirit Airlines
18 Dec - 05 Jan Spirit Airlines

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

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