Cheapest return flights from Chicago to Keflavik in December from 672€

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

Return flights

29 Dec - 16 Jan Icelandair direct
25 Dec - 29 Dec Icelandair direct
24 Dec - 27 Dec Icelandair direct
29 Dec - 02 Jan Icelandair direct
30 Dec - 04 Jan Icelandair direct
30 Dec - 03 Jan Spirit Airlines
26 Dec - 28 Dec Frontier Airlines
31 Dec - 03 Jan Frontier Airlines
27 Dec - 30 Dec Icelandair direct
28 Dec - 04 Jan Icelandair direct
27 Dec - 04 Jan Icelandair direct
26 Dec - 02 Jan Lufthansa
25 Dec - 03 Jan Frontier Airlines
28 Dec - 03 Jan Frontier Airlines

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

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