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

Return flights

25 Aug - 01 Sep	Icelandair	direct
24 Aug - 29 Aug	Icelandair	direct
21 Aug - 29 Aug	Icelandair	direct
12 Aug - 18 Aug	Icelandair	direct
14 Aug - 27 Aug	Air Canada
11 Aug - 18 Aug	Icelandair	direct
11 Aug - 17 Aug	SWISS
11 Aug - 16 Aug	Scandinavian Airlines
07 Aug - 17 Aug	Austrian Airlines
09 Aug - 16 Aug	SWISS
07 Aug - 12 Aug	Lufthansa

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

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

Cheapest return flights from Chicago to Keflavik in August from 507€

Return flights