Cheapest one-way flights from Seattle to Barcelona in August from 249€

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

One-Way flights

19 Aug Hawaiian Airlines
17 Aug Hawaiian Airlines
06 Aug Alaska Airlines
20 Aug Hawaiian Airlines
16 Aug Hawaiian Airlines
15 Aug Hawaiian Airlines
10 Aug British Airways
14 Aug Hawaiian Airlines
28 Aug WestJet

Also check the deals for return 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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