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

Return flights

03 Dec - 10 Dec	Air Canada
03 Dec - 12 Dec	TAP
04 Dec - 11 Dec	Icelandair
28 Dec - 09 Jan	Scandinavian Airlines
31 Dec - 13 Jan	TAP
31 Dec - 15 Jan	TAP
31 Dec - 14 Jan	TAP
31 Dec - 23 Jan	TAP
01 Dec - 07 Dec	Icelandair
31 Dec - 19 Jan	Icelandair
31 Dec - 17 Jan	Icelandair
11 Dec - 18 Dec	Icelandair
04 Dec - 09 Dec	Air Canada
31 Dec - 10 Jan	Icelandair
03 Dec - 12 Dec	Lufthansa	direct
04 Dec - 07 Dec	KLM
13 Dec - 21 Dec	Scandinavian Airlines
02 Dec - 09 Dec	United	direct
30 Dec - 17 Jan	Air Canada
26 Dec - 01 Jan	TAP

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 $370

Return flights