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

Return flights

08 Dec - 15 Dec	Frontier Airlines
08 Dec - 16 Dec	United
12 Dec - 15 Dec	British Airways
25 Dec - 26 Jan	Delta
13 Dec - 10 Jan	Frontier Airlines
28 Dec - 17 Jan	WestJet
05 Dec - 12 Dec	United
27 Dec - 11 Jan	Frontier Airlines
26 Dec - 17 Jan	Frontier Airlines
06 Dec - 27 Dec	Frontier Airlines
21 Dec - 11 Jan	Delta
27 Dec - 01 Jan	Frontier Airlines
23 Dec - 30 Dec	Frontier Airlines
11 Dec - 18 Dec	ITA Airways
22 Dec - 05 Jan	Frontier Airlines
20 Dec - 09 Jan	Frontier Airlines
27 Dec - 04 Jan	Frontier Airlines
22 Dec - 29 Dec	Frontier Airlines
19 Dec - 24 Dec	Frontier Airlines
13 Dec - 20 Dec	ITA Airways

Also check the deals for one-way flights from Phoenix 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 Phoenix to Rome in December from 504€

Return flights