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

Return flights

10 Dec - 13 Jan	Icelandair
05 Dec - 07 Dec	TAP
05 Dec - 09 Dec	TAP
03 Dec - 14 Dec	TAP
07 Dec - 14 Dec	TAP
03 Dec - 12 Dec	Icelandair
10 Dec - 17 Dec	TAP
05 Dec - 12 Dec	TAP
09 Dec - 18 Dec	Delta
05 Dec - 27 Dec	TAP
03 Dec - 27 Dec	TAP
24 Dec - 17 Jan	Iberia
11 Dec - 21 Jan	Delta
28 Dec - 17 Jan	TAP
12 Dec - 11 Jan	United
12 Dec - 10 Jan	Frontier Airlines
13 Dec - 10 Jan	Frontier Airlines
16 Dec - 11 Jan	Aer Lingus
17 Dec - 17 Jan	Aer Lingus
15 Dec - 10 Jan	Frontier Airlines

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 302€

Return flights