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

Return flights

03 Dec - 14 Dec	TAP
03 Dec - 10 Dec	TAP
03 Dec - 07 Dec	TAP
03 Dec - 13 Dec	TAP
10 Dec - 14 Dec	TAP
09 Dec - 18 Dec	Icelandair
01 Dec - 18 Dec	Icelandair
11 Dec - 18 Dec	Icelandair
01 Dec - 10 Dec	Icelandair
11 Dec - 17 Dec	Icelandair
31 Dec - 24 Jan	Icelandair
31 Dec - 16 Jan	Lufthansa
28 Dec - 17 Jan	Lufthansa
28 Dec - 08 Jan	Lufthansa
29 Dec - 24 Jan	Lufthansa
31 Dec - 10 Jan	Lufthansa
08 Dec - 11 Jan	Lufthansa
30 Dec - 09 Jan	Lufthansa
02 Dec - 08 Jan	Icelandair
29 Dec - 10 Jan	Lufthansa

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 $334

Return flights