Cheapest return flights from Seattle to Barcelona in August from $797

Best time to book flights for Seattle (SEA) to Barcelona (BCN) flights at AirHint

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

Return flights

31 Aug - 07 Sep Scandinavian Airlines
23 Aug - 27 Aug Aer Lingus
26 Aug - 30 Aug Icelandair
14 Aug - 18 Aug Icelandair
17 Aug - 21 Aug Alaska Airlines
05 Aug - 09 Aug Icelandair
08 Aug - 12 Aug Alaska Airlines
01 Aug - 08 Aug Lufthansa
02 Aug - 06 Aug WestJet
11 Aug - 15 Aug Condor

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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