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

Return flights

02 Dec - 09 Dec	Icelandair
12 Dec - 16 Dec	Frontier Airlines
05 Dec - 10 Dec	Aer Lingus
27 Dec - 06 Jan	Air Serbia
26 Dec - 08 Jan	LOT
12 Dec - 15 Dec	Iberia
13 Dec - 26 Dec	Frontier Airlines
13 Dec - 20 Dec	Frontier Airlines
13 Dec - 27 Dec	Frontier Airlines
15 Dec - 27 Dec	Frontier Airlines
25 Dec - 31 Dec	Aer Lingus
14 Dec - 30 Dec	jetBlue
19 Dec - 11 Jan	Frontier Airlines
19 Dec - 05 Jan	Frontier Airlines
18 Dec - 04 Jan	Frontier Airlines
19 Dec - 04 Jan	Frontier Airlines
25 Dec - 02 Jan	Lufthansa
19 Dec - 03 Jan	Frontier Airlines
20 Dec - 03 Jan	Spirit Airlines
20 Dec - 04 Jan	LOT

Also check the deals for one-way flights from Chicago to Bergamo 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 Bergamo in December from 646€

Return flights