September is by far the best month, wherein you can get cheapest flights for Chicago to Keflavik. Meanwhile, is perceived as the expensive month due to the varying factors. That’s why it’s highly advised to make advanced online flight booking to save huge amounts of money.
Disclaimer - All the mentioned fares were found within last 48 hrs. The displayed fares are based on historical data and are subject to change. The fares cannot be guaranteed at the time of booking.
ORD
22:15
Chicago Chicago O Hare International Airport
Wed , 03 Sep 2025
KEF
09:20
Keflavik Keflavik International Airport
Thu, 04 Sep 2025
ORD
19:25
Chicago Chicago O Hare International Airport
Wed , 03 Sep 2025
KEF
06:40
Keflavik Keflavik International Airport
Thu, 04 Sep 2025
ORD
22:15
Chicago Chicago O Hare International Airport
Tue , 02 Sep 2025
KEF
09:20
Keflavik Keflavik International Airport
Wed, 03 Sep 2025
ORD
17:30
Chicago Chicago O Hare International Airport
Thu , 04 Sep 2025
KEF
08:15
Keflavik Keflavik International Airport
Sat, 06 Sep 2025
ORD
18:00
Chicago Chicago O Hare International Airport
Thu , 04 Sep 2025
KEF
23:35
Keflavik Keflavik International Airport
Fri, 05 Sep 2025
ORD
11:25
Chicago Chicago O Hare International Airport
Fri , 05 Sep 2025
KEF
15:20
Keflavik Keflavik International Airport
Sat, 06 Sep 2025
ORD
19:15
Chicago Chicago O Hare International Airport
Tue , 02 Sep 2025
KEF
15:20
Keflavik Keflavik International Airport
Wed, 03 Sep 2025
ORD
19:15
Chicago Chicago O Hare International Airport
Thu , 04 Sep 2025
KEF
23:50
Keflavik Keflavik International Airport
Fri, 05 Sep 2025
ORD
19:15
Chicago Chicago O Hare International Airport
Thu , 04 Sep 2025
KEF
15:20
Keflavik Keflavik International Airport
Fri, 05 Sep 2025
ORD
21:40
Chicago Chicago O Hare International Airport
Wed , 03 Sep 2025
KEF
23:55
Keflavik Keflavik International Airport
Thu, 04 Sep 2025
ORD
21:40
Chicago Chicago O Hare International Airport
Fri , 05 Sep 2025
KEF
23:55
Keflavik Keflavik International Airport
Sat, 06 Sep 2025