AirHint found the following cheapest one-way flights from Seattle (SEA) to Barcelona (BCN) in April 2026 (see full year).
One-Way flights
| 27 Apr | Icelandair | ||
| 06 Apr | WestJet | ||
| 26 Apr | WestJet | ||
| 25 Apr | Icelandair |
Also check the deals for return flights from Seattle to Barcelona in April.
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