AirHint found the following cheapest return flights from Jacksonville (JAX) to Madrid (MAD) in March 2026 (see full year).
Return flights
| 09 Mar - 17 Mar | Delta | ||
| 23 Mar - 08 Apr | Delta | ||
| 25 Mar - 01 Apr | KLM | ||
| 09 Mar - 23 Mar | Allegiant Air | ||
| 14 Mar - 21 Mar | Frontier Airlines |
Also check the deals for one-way flights from Jacksonville to Madrid in March.
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