AirHint found the following cheapest return flights from Keflavik (KEF) to Tallinn (TLL) in December 2025 (see full year).
Return flights
| 06 Dec - 13 Dec | SWISS | ||
| 31 Dec - 11 Jan | Wizz Air | ||
| 08 Dec - 11 Dec | easyJet | ||
| 08 Dec - 10 Dec | easyJet |
Also check the deals for one-way flights from Keflavik to Tallinn in December.
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