Cheapest return flights from Chicago to Keflavik in August from $640

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

Return flights

21 Aug - 27 Aug Finnair
09 Aug - 16 Aug Finnair
17 Aug - 24 Aug Icelandair direct
21 Aug - 27 Aug Icelandair direct
16 Aug - 23 Aug Icelandair direct
05 Aug - 19 Aug SWISS
08 Aug - 17 Aug SWISS
07 Aug - 14 Aug SWISS
10 Aug - 14 Aug WestJet
05 Aug - 19 Aug Icelandair direct

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

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