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

Return flights

10 Dec - 14 Dec	Icelandair
07 Dec - 14 Dec	Icelandair
12 Dec - 14 Dec	Icelandair
03 Dec - 09 Dec	Icelandair
03 Dec - 13 Dec	TAP
02 Dec - 10 Dec	British Airways
07 Dec - 12 Dec	Icelandair
14 Dec - 20 Jan	TAP
11 Dec - 23 Dec	Air France
12 Dec - 17 Dec	Aer Lingus
05 Dec - 27 Dec	TAP
14 Dec - 19 Jan	Aer Lingus
26 Dec - 17 Jan	Aer Lingus
27 Dec - 17 Jan	Aer Lingus
25 Dec - 17 Jan	Aer Lingus
24 Dec - 17 Jan	TAP
17 Dec - 13 Jan	Aer Lingus
17 Dec - 16 Jan	Aer Lingus
17 Dec - 14 Jan	Aer Lingus
17 Dec - 15 Jan	Aer Lingus

Also check the deals for one-way flights from Chicago to Barcelona 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 Barcelona in December from 335€

Return flights