Cheapest return flights from Chicago to Keflavik in May from $462

Best time to book flights for Chicago (MDW) to Keflavik (KEF) flights at AirHint

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

Return flights

02 May - 08 May Frontier Airlines
13 May - 19 May KLM
13 May - 20 May KLM
13 May - 18 May KLM
05 May - 12 May Air France
06 May - 12 May Air France
06 May - 11 May KLM
06 May - 13 May Air France
26 May - 01 Jun Air France
07 May - 20 May Air France
02 May - 10 May Frontier Airlines
30 May - 09 Jun Air France
30 May - 07 Jun Frontier Airlines

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

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The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

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