AirHint found the following cheapest return flights from Seattle (SEA) to Madrid (MAD) in April 2026 (see full year).
Return flights
| 26 Apr - 02 May | Condor | ||
| 24 Apr - 03 May | Condor | ||
| 09 Apr - 16 Apr | Iberia | ||
| 19 Apr - 26 Apr | Iberia | ||
| 01 Apr - 11 Apr | Turkish Airlines | ||
| 14 Apr - 21 Apr | Iberia | ||
| 29 Apr - 06 May | Iberia | ||
| 24 Apr - 01 May | Iberia |
Also check the deals for one-way flights from Seattle to Madrid in April.
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