Cheapest return flights from Chicago to Keflavik in May from $753

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

Return flights

12 May - 19 May Air France
12 May - 20 May Air France
03 May - 16 May Air France
16 May - 23 May Air France
20 May - 27 May KLM
15 May - 22 May Delta
19 May - 23 May Southwest Airlines
22 May - 12 Jun Delta

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

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