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

Return flights

05 Dec - 08 Dec	Icelandair
04 Dec - 14 Dec	Icelandair
06 Dec - 13 Dec	Icelandair
06 Dec - 14 Dec	Icelandair
05 Dec - 07 Dec	Icelandair
02 Dec - 10 Dec	Icelandair
03 Dec - 10 Dec	TAP
10 Dec - 18 Dec	TAP
31 Dec - 11 Jan	Icelandair
08 Dec - 18 Dec	Icelandair
11 Dec - 18 Dec	Icelandair
28 Dec - 09 Jan	Aer Lingus
30 Dec - 09 Jan	Aer Lingus
28 Dec - 21 Jan	Aer Lingus
28 Dec - 22 Jan	Aer Lingus
31 Dec - 16 Jan	Air Canada
29 Dec - 08 Jan	Lufthansa
24 Dec - 09 Jan	Lufthansa
25 Dec - 17 Jan	Icelandair
30 Dec - 08 Jan	SWISS

Also check the deals for one-way flights from Chicago 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 Chicago to Rome in December from $381

Return flights