Cheapest return flights from Seattle to Barcelona in August from $604

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

24 Aug - 31 Aug Scandinavian Airlines
26 Aug - 02 Sep Icelandair
31 Aug - 07 Sep Scandinavian Airlines
20 Aug - 27 Aug United
13 Aug - 20 Aug Air Canada
12 Aug - 19 Aug Air Canada
19 Aug - 26 Aug Air Canada
14 Aug - 21 Aug Finnair
21 Aug - 28 Aug Air France
18 Aug - 25 Aug Finnair
22 Aug - 29 Aug British Airways
23 Aug - 30 Aug British Airways
25 Aug - 01 Sep Air France
20 Aug - 21 Sep British Airways
28 Aug - 04 Sep Turkish Airlines
27 Aug - 03 Sep Turkish Airlines
30 Aug - 06 Sep Iberia

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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