Cheapest return flights from Seattle to Barcelona in October from 404€

AirHint found the following cheapest return flights from Seattle (SEA) to Barcelona (BCN) in October 2025 (see full year).

Return flights

26 Oct - 11 Nov Lufthansa
03 Oct - 14 Oct Lufthansa
01 Oct - 16 Oct Lufthansa
11 Oct - 24 Oct Lufthansa
24 Oct - 15 Nov Lufthansa
23 Oct - 15 Nov United
31 Oct - 23 Nov United
16 Oct - 19 Oct Air Canada
11 Oct - 01 Nov United
31 Oct - 22 Nov Hawaiian Airlines
08 Oct - 13 Oct Delta
10 Oct - 25 Oct Delta

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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