AirHint found the following cheapest return flights from Washington (IAD) to Berlin (BER) in December 2025 (see full year).
Return flights
| 29 Dec - 14 Jan | Austrian Airlines | ||
| 31 Dec - 07 Jan | Lufthansa | ||
| 30 Dec - 06 Jan | Lufthansa | ||
| 27 Dec - 03 Jan | Lufthansa |
Also check the deals for one-way flights from Washington to Berlin in December.
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