Cheapest return flights from Chicago to Keflavik in August from 721€

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

Return flights

26 Aug - 31 Aug Frontier Airlines
18 Aug - 25 Aug Virgin Atlantic
12 Aug - 19 Aug Southwest Airlines
24 Aug - 15 Sep Air France
17 Aug - 24 Aug Southwest Airlines
05 Aug - 12 Aug Southwest Airlines
27 Aug - 30 Aug Southwest Airlines
28 Aug - 04 Sep Delta
30 Aug - 06 Sep Delta
13 Aug - 20 Aug Southwest Airlines
31 Aug - 07 Sep Frontier Airlines
22 Aug - 28 Aug Southwest Airlines
11 Aug - 18 Aug Southwest Airlines
14 Aug - 21 Aug Southwest Airlines
29 Aug - 05 Sep Delta

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

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