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Results refresh when you open or revisit this page. Last snapshot: Jul 15, 2026.

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Cheapest one-way flights from Seattle (SEA) to Barcelona (BCN), September

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Dates, airline, and price
Dates	Airline	Price
12 Sep	Icelandair
11 Sep	Icelandair
08 Sep	Icelandair
04 Sep	Icelandair
03 Sep	Icelandair
01 Sep	Icelandair
15 Sep	Frontier Airlines
15 Sep	Air France Direct Flight
08 Sep	Air France Direct Flight
17 Sep	Air France Direct Flight

deals for return flights from Seattle to Barcelona in September.

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Updated Jul 15, 2026.

About these fares

These results come from our latest search across airlines for your currency. Prices change quickly and are not locked until you complete booking—always confirm the total and fare rules on the partner site.

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Cheapest one-way flights from Seattle (SEA) to Barcelona (BCN), September

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