AirHint found the following cheapest one-way flights from Seattle (SEA) to Madrid (MAD) in November 2025 (see full year).
One-Way flights
| 10 Nov | Frontier Airlines | ||
| 30 Nov | WestJet | ||
| 11 Nov | Iberia | ||
| 16 Nov | Iberia | ||
| 18 Nov | Iberia | ||
| 28 Nov | Iberia | ||
| 29 Nov | Iberia | ||
| 17 Nov | Iberia | ||
| 24 Nov | Iberia | ||
| 25 Nov | Iberia |
Also check the deals for return flights from Seattle to Madrid in November.
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