Cheapest return flights from Seattle to Barcelona in August from $528

AirHint found the following cheapest return flights from Seattle (SEA) to Barcelona (BCN) in August 2025 (see full year).

Return flights

16 Aug - 24 Aug Scandinavian Airlines
24 Aug - 01 Sep Air Canada
04 Aug - 20 Aug KLM
17 Aug - 31 Aug Scandinavian Airlines
23 Aug - 27 Aug Aer Lingus
22 Aug - 28 Aug Aer Lingus
31 Aug - 08 Sep Scandinavian Airlines
29 Aug - 12 Sep Icelandair

Also check the deals for one-way flights from Seattle to Barcelona in August.

Skyscanner

The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

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