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

Return flights

18 Dec - 07 Jan	TAP
30 Dec - 07 Jan	TAP
27 Dec - 05 Jan	TAP
26 Dec - 04 Jan	TAP
30 Dec - 04 Jan	TAP
30 Dec - 05 Jan	TAP
26 Dec - 05 Jan	TAP
24 Dec - 04 Jan	TAP
27 Dec - 07 Jan	TAP
25 Dec - 03 Jan	TAP
05 Dec - 09 Dec	TAP
01 Dec - 14 Dec	Aer Lingus
19 Dec - 22 Dec	TAP

Also check the deals for one-way flights from Rome to Boston 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 Rome to Boston in December from $386

Return flights