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

Return flights

03 Dec - 12 Dec	TAP
02 Dec - 16 Dec	Air France
08 Dec - 15 Dec	Icelandair
04 Dec - 12 Dec	KLM
05 Dec - 08 Dec	KLM
03 Dec - 12 Dec	United	direct
03 Dec - 10 Dec	United	direct
02 Dec - 16 Dec	United	direct
10 Dec - 31 Dec	Air Canada
28 Dec - 09 Jan	Scandinavian Airlines
11 Dec - 18 Dec	United	direct
26 Dec - 06 Jan	Scandinavian Airlines
29 Dec - 05 Jan	SWISS
19 Dec - 15 Jan	TAP
20 Dec - 15 Jan	Icelandair
24 Dec - 05 Jan	Lufthansa
26 Dec - 05 Jan	Lufthansa
27 Dec - 03 Jan	Scandinavian Airlines
27 Dec - 02 Jan	SWISS
26 Dec - 07 Jan	Delta

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 306€

Return flights