Cheapest return flights from Atlanta to Keflavik in May from $613

AirHint found the following cheapest return flights from Atlanta (ATL) to Keflavik (KEF) in May 2026 (see full year).

Return flights

19 May - 27 May Frontier Airlines
20 May - 28 May Frontier Airlines
18 May - 25 May Spirit Airlines
11 May - 20 May Spirit Airlines
24 May - 01 Jun Frontier Airlines
21 May - 29 May Frontier Airlines
25 May - 02 Jun Frontier Airlines
26 May - 04 Jun Frontier Airlines
22 May - 30 May Frontier Airlines
22 May - 25 May Spirit Airlines
23 May - 31 May Frontier Airlines
11 May - 13 May Frontier Airlines

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

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