AirHint found the following cheapest return flights from Keflavik (KEF) to Bucharest (OTP) in December 2025 (see full year).
Return flights
| 06 Dec - 13 Dec | Wizz Air | ||
| 13 Dec - 06 Jan | easyJet | ||
| 24 Dec - 06 Jan | KLM | ||
| 15 Dec - 05 Jan | Transavia France | ||
| 23 Dec - 06 Jan | easyJet |
Also check the deals for one-way flights from Keflavik to Bucharest in December.
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