Cheapest return flights from St. Louis to Madrid in December from $585

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

Return flights

03 Dec - 10 Dec Iberia
05 Dec - 12 Dec United
08 Dec - 15 Dec Iberia
25 Dec - 31 Dec American Airlines
28 Dec - 04 Jan United
18 Dec - 25 Dec United

Also check the deals for one-way flights from St. Louis to Madrid in December.

Skyscanner

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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