AirHint found the following cheapest one-way flights from Chicago (MDW) to Keflavik (KEF) in January 2026 (see full year).
One-Way flights
| 09 Jan | Frontier Airlines | ||
| 16 Jan | Frontier Airlines | ||
| 10 Jan | Southwest Airlines | ||
| 17 Jan | Southwest Airlines |
Also check the deals for return flights from Chicago to Keflavik in January.
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