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

Return flights

07 Dec - 16 Dec	TAP
06 Dec - 13 Dec	Scandinavian Airlines
03 Dec - 10 Dec	TAP
02 Dec - 09 Dec	Iberia	direct
07 Dec - 16 Dec	British Airways	direct
10 Dec - 09 Jan	Lufthansa
23 Dec - 15 Jan	Air Canada
03 Dec - 19 Dec	Air Canada
01 Dec - 08 Dec	British Airways
23 Dec - 13 Jan	Air Canada
12 Dec - 19 Dec	TAP
07 Dec - 14 Dec	Iberia	direct
06 Dec - 11 Dec	Aer Lingus
30 Dec - 11 Jan	Air Canada
11 Dec - 22 Jan	Aer Lingus
12 Dec - 10 Jan	TAP
28 Dec - 11 Jan	Air Canada
14 Dec - 10 Jan	TAP
30 Dec - 10 Jan	British Airways
10 Dec - 11 Jan	United

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 $427

Return flights