Cheapest return flights from Chicago to Keflavik in May from 491€

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

06 May - 11 May Frontier Airlines
19 May - 26 May KLM
08 May - 16 May Air France
13 May - 19 May KLM
13 May - 20 May KLM
11 May - 20 May KLM
20 May - 27 May Air France
10 May - 17 May KLM
07 May - 14 May Air France
24 May - 31 May Air France

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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