Cheapest return flights from Seattle to Barcelona in October from $492

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 - 07 Nov British Airways
07 Oct - 14 Oct Aer Lingus
09 Oct - 16 Oct Aer Lingus
29 Oct - 05 Nov United
06 Oct - 13 Oct Delta
02 Oct - 09 Oct Icelandair
03 Oct - 10 Oct Aer Lingus
04 Oct - 11 Oct Aer Lingus
05 Oct - 12 Oct Aer Lingus
19 Oct - 26 Oct United

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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