AirHint found the following cheapest return flights from Tallinn (TLL) to Keflavik (KEF) in December 2025 (see full year).
Return flights
| 01 Dec - 07 Dec | Ryanair | ||
| 08 Dec - 11 Dec | Finnair | ||
| 24 Dec - 29 Dec | Finnair | ||
| 29 Dec - 03 Jan | Finnair |
Also check the deals for one-way flights from Tallinn to Keflavik in December.
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