AirHint found the following cheapest return flights from Belfast (BFS) to Keflavik (KEF) in January 2026 (see full year).
Return flights
| 21 Jan - 26 Jan | easyJet | ||
| 06 Jan - 10 Jan | easyJet | ||
| 02 Jan - 06 Jan | easyJet | ||
| 02 Jan - 09 Jan | easyJet | ||
| 01 Jan - 04 Jan | Ryanair |
Also check the deals for one-way flights from Belfast to Keflavik in January.
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