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

Return flights

30 Dec - 24 Jan	Virgin Atlantic
03 Dec - 12 Dec	Delta
05 Dec - 13 Dec	Delta
28 Dec - 17 Jan	Delta
15 Dec - 24 Dec	KLM
17 Dec - 24 Dec	KLM
01 Dec - 27 Dec	KLM
27 Dec - 09 Jan	Delta
28 Dec - 05 Jan	Delta
06 Dec - 27 Dec	Virgin Atlantic
05 Dec - 27 Dec	KLM
23 Dec - 17 Jan	Virgin Atlantic
03 Dec - 27 Dec	Virgin Atlantic
26 Dec - 17 Jan	Delta
18 Dec - 06 Jan	Delta
25 Dec - 01 Jan	Delta
24 Dec - 31 Dec	Delta
07 Dec - 27 Dec	KLM
17 Dec - 02 Jan	Delta
18 Dec - 02 Jan	Delta

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 $514

Return flights