AirHint found the following cheapest return flights from Sofia (SOF) to Keflavik (KEF) in May 2026 (see full year).
Return flights
| 11 May - 17 May | Ryanair | ||
| 19 May - 25 May | Wizz Air | ||
| 16 May - 24 May | Ryanair | ||
| 18 May - 31 May | Wizz Air | ||
| 21 May - 29 May | LOT | ||
| 20 May - 31 May | Wizz Air | ||
| 21 May - 27 May | LOT | ||
| 21 May - 28 May | LOT |
Also check the deals for one-way flights from Sofia to Keflavik in May.
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