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

Return flights

03 Dec - 07 Dec	TAP
02 Dec - 10 Dec	TAP
05 Dec - 12 Dec	TAP
05 Dec - 16 Dec	TAP
31 Dec - 12 Jan	TAP
05 Dec - 10 Dec	TAP
03 Dec - 13 Dec	TAP
04 Dec - 12 Dec	TAP
05 Dec - 09 Dec	TAP
10 Dec - 18 Dec	Icelandair
03 Dec - 06 Dec	Turkish Airlines
15 Dec - 10 Jan	Frontier Airlines
29 Dec - 24 Jan	Frontier Airlines
30 Dec - 06 Jan	Turkish Airlines
30 Dec - 07 Jan	Turkish Airlines
24 Dec - 18 Jan	TAP
23 Dec - 16 Jan	Frontier Airlines
23 Dec - 17 Jan	Frontier Airlines
23 Dec - 10 Jan	Frontier Airlines
23 Dec - 29 Jan	Frontier 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 362€

Return flights