Cheapest return flights from Chicago to Keflavik in August from $524

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

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

Return flights

27 Aug - 05 Sep jetBlue
20 Aug - 26 Aug Finnair
20 Aug - 27 Aug Finnair
12 Aug - 20 Aug Finnair
19 Aug - 24 Aug Spirit Airlines
28 Aug - 03 Sep Air Canada
30 Aug - 10 Sep United direct
31 Aug - 07 Sep United
28 Aug - 08 Sep United
31 Aug - 10 Sep United
31 Aug - 11 Sep United
28 Aug - 05 Sep Air Canada
31 Aug - 08 Sep United
28 Aug - 07 Sep Air Canada
13 Aug - 20 Aug jetBlue
19 Aug - 26 Aug Spirit Airlines
18 Aug - 26 Aug Finnair
18 Aug - 27 Aug Finnair
20 Aug - 28 Aug Spirit Airlines
13 Aug - 18 Aug jetBlue

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

Skyscanner

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.

Book a cheap hotel in Keflavik

Cheap car rent in Keflavik