Cheapest return SEA–BCN flights, August

AirHint found the following cheapest return flights from Seattle (SEA) to Barcelona (BCN) in August 2026 (see full year).

Return flights

18 Aug - 25 Aug Condor
15 Aug - 29 Aug Condor
15 Aug - 30 Aug Condor
14 Aug - 21 Aug Icelandair
20 Aug - 03 Sep Icelandair
08 Aug - 04 Sep Condor
08 Aug - 17 Aug British Airways
08 Aug - 19 Aug British Airways
03 Aug - 17 Aug Air France
06 Aug - 13 Aug Aer Lingus
19 Aug - 23 Aug Icelandair
07 Aug - 16 Aug Icelandair
08 Aug - 04 Sep Air France direct

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

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