AirHint found the following cheapest return flights from Seattle (SEA) to Barcelona (BCN) in August 2026 (see full year).
Return flights
| 06 Aug - 13 Aug | Condor | ||
| 11 Aug - 18 Aug | Condor | ||
| 08 Aug - 04 Sep | Condor | ||
| 08 Aug - 04 Sep | Air France | direct | |
| 19 Aug - 26 Aug | Icelandair | ||
| 29 Aug - 05 Sep | Icelandair |
Also check the deals for one-way flights from Seattle to Barcelona in August.
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