Cheapest return flights from St. Louis to Madrid in March from $474

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 Air Canada
05 Mar - 16 Mar British Airways
05 Mar - 12 Mar British Airways
05 Mar - 13 Mar British Airways
01 Mar - 08 Mar Iberia
07 Mar - 15 Mar British Airways
04 Mar - 11 Mar Iberia
07 Mar - 14 Mar British Airways
05 Mar - 14 Mar British Airways
22 Mar - 29 Mar Iberia
25 Mar - 01 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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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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