AirHint found the following cheapest return flights from Washington (IAD) to Rome (FCO) in December 2025 (see full year).

Return flights

06 Dec - 18 Dec	TAP
06 Dec - 15 Dec	TAP
04 Dec - 11 Dec	TAP
11 Dec - 18 Dec	TAP
09 Dec - 16 Dec	TAP
28 Dec - 17 Jan	TAP
29 Dec - 24 Jan	Scandinavian Airlines
11 Dec - 14 Dec	TAP
05 Dec - 07 Dec	TAP
15 Dec - 10 Jan	TAP
24 Dec - 17 Jan	Scandinavian Airlines
24 Dec - 10 Jan	Scandinavian Airlines
25 Dec - 17 Jan	Scandinavian Airlines
14 Dec - 20 Dec	TAP
28 Dec - 11 Jan	TAP
27 Dec - 17 Jan	Scandinavian Airlines
24 Dec - 11 Jan	Scandinavian Airlines
15 Dec - 29 Dec	TAP
02 Dec - 27 Dec	TAP
22 Dec - 17 Jan	Scandinavian Airlines

Also check the deals for one-way flights from Washington to Rome in December.

The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

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Cheapest return flights from Washington to Rome in December from 374€

Return flights