Cheapest return flights from Chicago to Keflavik in September from $520

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

09 Sep - 16 Sep jetBlue
16 Sep - 01 Oct jetBlue
24 Sep - 01 Oct jetBlue
18 Sep - 25 Sep jetBlue
17 Sep - 25 Sep jetBlue
07 Sep - 15 Sep jetBlue
23 Sep - 02 Oct Icelandair direct
22 Sep - 03 Oct Icelandair direct
04 Sep - 10 Sep Air Canada
24 Sep - 05 Oct Icelandair direct
25 Sep - 03 Oct Icelandair direct
19 Sep - 04 Oct Icelandair direct
11 Sep - 18 Sep jetBlue
19 Sep - 29 Sep Icelandair direct
08 Sep - 16 Sep Icelandair direct
30 Sep - 11 Oct Icelandair direct
30 Sep - 15 Oct Icelandair direct
09 Sep - 16 Sep Icelandair direct
15 Sep - 22 Sep Icelandair direct
16 Sep - 01 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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