AirHint found the following cheapest return flights from Belfast (BFS) to Keflavik (KEF) in October 2025 (see full year).
Return flights
| 21 Oct - 28 Oct | easyJet | ||
| 31 Oct - 01 Nov | Ryanair | ||
| 24 Oct - 27 Oct | Ryanair | ||
| 28 Oct - 29 Oct | easyJet | ||
| 26 Oct - 29 Oct | Ryanair |
Also check the deals for one-way flights from Belfast to Keflavik in October.
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