AirHint found the following cheapest return flights from St. Louis (STL) to Madrid (MAD) in May 2026 (see full year).
Return flights
| 12 May - 21 May | British Airways | ||
| 03 May - 10 May | Iberia | ||
| 08 May - 15 May | Iberia | ||
| 13 May - 20 May | Iberia | ||
| 18 May - 25 May | Iberia | ||
| 23 May - 30 May | Iberia | ||
| 28 May - 04 Jun | Iberia |
Also check the deals for one-way flights from St. Louis to Madrid in May.
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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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