Cheapest return flights from Chicago to Keflavik in August from 544€

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

15 Aug - 22 Aug United direct
15 Aug - 24 Aug United direct
20 Aug - 26 Aug Finnair
28 Aug - 04 Sep Icelandair direct
24 Aug - 01 Sep United
20 Aug - 26 Aug Icelandair direct
22 Aug - 01 Sep Icelandair direct
10 Aug - 17 Aug United direct
22 Aug - 30 Aug Icelandair direct
22 Aug - 31 Aug Icelandair direct
24 Aug - 01 Sep Icelandair direct
11 Aug - 17 Aug Finnair
27 Aug - 01 Sep Icelandair direct
11 Aug - 17 Aug Icelandair direct
02 Aug - 10 Aug Icelandair direct

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