AirHint found the following cheapest one-way flights from Washington (IAD) to Rome (FCO) in December 2025 (see full year).
One-Way flights
| 31 Dec | Icelandair | ||
| 27 Dec | Lufthansa | ||
| 28 Dec | Lufthansa | direct | |
| 27 Dec | Lufthansa | direct |
Also check the deals for return flights from Washington to Rome in December.
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