Cheapest one-way flights from Chicago to Keflavik in March from $339

AirHint found the following cheapest one-way flights from Chicago (ORD) to Keflavik (KEF) in March 2026 (see full year).

One-Way flights

01 Mar Frontier Airlines
14 Mar Spirit Airlines
06 Mar WestJet
01 Mar Icelandair direct
05 Mar Lufthansa
06 Mar Icelandair direct
05 Mar Icelandair direct
21 Mar British Airways
21 Mar Icelandair direct
19 Mar Icelandair direct

Also check the deals for return flights from Chicago to Keflavik in March.

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