Cheapest return flights from Seattle to Barcelona in August from 623€

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

Return flights

29 Aug - 12 Sep Icelandair
20 Aug - 04 Sep Scandinavian Airlines
17 Aug - 31 Aug Icelandair
21 Aug - 01 Sep Icelandair
21 Aug - 23 Sep WestJet
26 Aug - 20 Sep Icelandair
28 Aug - 20 Sep Icelandair
24 Aug - 02 Sep Scandinavian Airlines

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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