Cheapest return flights from Seattle to Barcelona in October from $607

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

08 Oct - 15 Oct Air Canada
12 Oct - 25 Oct Air Canada
15 Oct - 25 Oct Air Canada
10 Oct - 17 Oct Air Canada
03 Oct - 10 Oct United
13 Oct - 20 Oct United
02 Oct - 10 Oct Air Canada
23 Oct - 30 Oct United
10 Oct - 25 Oct Air Canada

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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