Cheapest return flights from St. Louis to Madrid in March from $658

AirHint found the following cheapest return flights from St. Louis (STL) to Madrid (MAD) in March 2026 (see full year).

Return flights

10 Mar - 17 Mar British Airways
08 Mar - 16 Mar Iberia
09 Mar - 16 Mar Iberia
10 Mar - 16 Mar Iberia
07 Mar - 16 Mar British Airways
01 Mar - 07 Mar British Airways
09 Mar - 15 Mar British Airways
08 Mar - 15 Mar British Airways
07 Mar - 15 Mar British Airways
11 Mar - 16 Mar British Airways
30 Mar - 06 Apr Iberia
26 Mar - 02 Apr Iberia
28 Mar - 04 Apr Iberia

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

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