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

Return flights

09 Dec - 17 Dec	United
09 Dec - 17 Dec	British Airways	direct
30 Dec - 06 Jan	Frontier Airlines
18 Dec - 15 Jan	Frontier Airlines
13 Dec - 19 Dec	Frontier Airlines
26 Dec - 06 Jan	Frontier Airlines
25 Dec - 04 Jan	Frontier Airlines
24 Dec - 04 Jan	Frontier Airlines
22 Dec - 29 Dec	Frontier Airlines
25 Dec - 05 Jan	Frontier Airlines
30 Dec - 06 Jan	Finnair	direct
22 Dec - 28 Dec	Frontier Airlines
18 Dec - 30 Dec	Spirit Airlines
16 Dec - 01 Jan	United
10 Dec - 23 Dec	American Airlines
26 Dec - 06 Jan	Iberia	direct
24 Dec - 04 Jan	Finnair	direct
22 Dec - 28 Dec	Finnair	direct
18 Dec - 30 Dec	Finnair	direct

Also check the deals for one-way flights from Philadelphia 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 Philadelphia to Rome in December from $555

Return flights