AirHint found the following cheapest one-way flights from Seattle (SEA) to Barcelona (BCN) in July 2026 (see full year).
One-Way flights
| 26 Jul | Icelandair | ||
| 25 Jul | Alaska Airlines | ||
| 24 Jul | Aer Lingus | ||
| 09 Jul | Lufthansa | ||
| 25 Jul | KLM | direct | |
| 09 Jul | KLM | direct |
Also check the deals for return flights from Seattle to Barcelona in July.
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