Cheapest return flights from Chicago to Keflavik in September from 539€

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 September 2025 (see full year).

Return flights

23 Sep - 01 Oct jetBlue
17 Sep - 02 Oct jetBlue
25 Sep - 03 Oct Air Canada
24 Sep - 02 Oct Air Canada
16 Sep - 24 Sep Air Canada
15 Sep - 23 Sep United
01 Sep - 09 Sep Air Canada
19 Sep - 27 Sep Air Canada
21 Sep - 29 Sep Air Canada
14 Sep - 29 Sep Air Canada
05 Sep - 13 Sep Air Canada
18 Sep - 23 Sep Air Canada
23 Sep - 01 Oct Icelandair direct
18 Sep - 23 Sep Icelandair direct
17 Sep - 02 Oct Icelandair direct
16 Sep - 24 Sep Icelandair direct
24 Sep - 02 Oct Icelandair direct
25 Sep - 03 Oct Icelandair direct
26 Sep - 06 Oct Icelandair direct
26 Sep - 11 Oct Icelandair direct

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

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.

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