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
31 Dec - 15 Jan	Icelandair
07 Dec - 18 Dec	Lufthansa	direct
08 Dec - 17 Dec	Lufthansa	direct
07 Dec - 16 Dec	Lufthansa	direct
31 Dec - 20 Jan	Lufthansa
31 Dec - 16 Jan	Lufthansa
31 Dec - 13 Jan	Lufthansa
31 Dec - 14 Jan	Lufthansa
03 Dec - 13 Dec	Lufthansa
08 Dec - 15 Dec	Lufthansa
07 Dec - 13 Dec	Lufthansa
05 Dec - 18 Dec	Lufthansa	direct
02 Dec - 09 Dec	Lufthansa
11 Dec - 16 Dec	Lufthansa	direct
08 Dec - 11 Jan	Lufthansa
02 Dec - 11 Jan	SWISS
31 Dec - 11 Jan	Brussels Airlines
30 Dec - 08 Jan	Air France
31 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 347€

Return flights