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

Return flights

29 Dec - 18 Jan	TAP
03 Dec - 10 Dec	TAP
10 Dec - 17 Dec	British Airways
14 Dec - 23 Dec	British Airways
27 Dec - 17 Jan	Scandinavian Airlines
25 Dec - 08 Jan	Icelandair
28 Dec - 18 Jan	TAP
28 Dec - 19 Jan	TAP
28 Dec - 16 Jan	TAP
14 Dec - 23 Dec	United	direct
28 Dec - 17 Jan	TAP
27 Dec - 18 Jan	British Airways
14 Dec - 28 Dec	British Airways
26 Dec - 17 Jan	British Airways
22 Dec - 31 Dec	Air Canada
21 Dec - 31 Dec	Lufthansa
17 Dec - 31 Dec	Lufthansa
20 Dec - 30 Dec	Lufthansa
20 Dec - 31 Dec	Lufthansa
12 Dec - 02 Jan	Lufthansa

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 $413

Return flights