Cheapest return flights from Seattle to Barcelona in October from $661

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 October 2025 (see full year).

Return flights

31 Oct - 04 Nov Lufthansa
16 Oct - 20 Oct Turkish Airlines
02 Oct - 09 Oct Turkish Airlines
23 Oct - 30 Oct Turkish Airlines
22 Oct - 26 Oct Turkish Airlines
07 Oct - 11 Oct Turkish Airlines
13 Oct - 17 Oct Alaska Airlines

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

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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