Cheapest return flights from Chicago to Keflavik in May from $564

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

Return flights

15 May - 22 May Finnair
19 May - 26 May Finnair
20 May - 27 May Finnair
21 May - 28 May Finnair
30 May - 07 Jun Icelandair direct
29 May - 07 Jun Icelandair direct
09 May - 19 May Icelandair direct
08 May - 22 May Icelandair direct
29 May - 05 Jun Finnair
05 May - 12 May Icelandair direct
11 May - 18 May Icelandair direct
19 May - 26 May Icelandair direct
23 May - 30 May Icelandair direct
29 May - 05 Jun Icelandair direct

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

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