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

Return flights

03 Dec - 10 Dec	TAP
03 Dec - 11 Dec	TAP
03 Dec - 12 Dec	TAP
05 Dec - 13 Dec	TAP
09 Dec - 18 Dec	Finnair	direct
01 Dec - 09 Dec	Iberia
01 Dec - 08 Dec	Iberia
30 Dec - 14 Jan	Aer Lingus
08 Dec - 17 Dec	Air France
01 Dec - 08 Dec	Finnair	direct
05 Dec - 12 Dec	Finnair	direct
29 Dec - 14 Jan	British Airways
24 Dec - 17 Jan	British Airways
29 Dec - 24 Jan	Air Canada
12 Dec - 12 Jan	Air Canada
14 Dec - 10 Jan	Spirit Airlines
12 Dec - 11 Jan	Spirit Airlines
12 Dec - 09 Jan	Spirit Airlines
29 Dec - 08 Jan	Scandinavian Airlines
12 Dec - 10 Jan	Spirit Airlines

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 $322

Return flights