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

Return flights

08 Dec - 15 Dec	Icelandair
11 Dec - 18 Dec	Icelandair
29 Dec - 24 Jan	British Airways
26 Dec - 17 Jan	Turkish Airlines
17 Dec - 31 Dec	Icelandair
21 Dec - 10 Jan	Icelandair
14 Dec - 28 Dec	Lufthansa
13 Dec - 03 Jan	Frontier Airlines
21 Dec - 31 Dec	Icelandair
22 Dec - 31 Dec	Delta
20 Dec - 01 Jan	Turkish Airlines
13 Dec - 04 Jan	Lufthansa
19 Dec - 26 Dec	ITA Airways
24 Dec - 31 Dec	ITA Airways
05 Dec - 12 Dec	ITA Airways
14 Dec - 21 Dec	ITA Airways

Also check the deals for one-way flights from Denver 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 Denver to Rome in December from 675€

Return flights