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

Return flights

30 Dec - 13 Jan	Aer Lingus
30 Dec - 14 Jan	Air Canada
29 Dec - 27 Jan	Iberia
30 Dec - 21 Jan	American Airlines
29 Dec - 27 Jan	Finnair	direct
29 Dec - 19 Jan	British Airways
31 Dec - 11 Jan	Iberia
30 Dec - 12 Jan	British Airways
30 Dec - 09 Jan	Brussels Airlines
29 Dec - 19 Jan	Finnair	direct
23 Dec - 30 Dec	British Airways
24 Dec - 31 Dec	British Airways
25 Dec - 31 Dec	Air Canada
25 Dec - 30 Dec	Iberia
18 Dec - 28 Dec	British Airways
17 Dec - 22 Dec	SWISS
20 Dec - 27 Dec	Arajet
19 Dec - 23 Dec	Frontier Airlines
25 Dec - 30 Dec	Iberia	direct
20 Dec - 28 Dec	Arajet

Also check the deals for one-way flights from Chicago to Madrid 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 Madrid in December from $481

Return flights