Cheapest return flights from Seattle to Barcelona in December from 356€

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

Return flights

03 Dec - 10 Dec Air Canada
04 Dec - 11 Dec Air Canada
01 Dec - 08 Dec Air Canada
02 Dec - 09 Dec Lufthansa
06 Dec - 20 Dec Lufthansa
22 Dec - 05 Jan Icelandair
26 Dec - 02 Jan Alaska Airlines
22 Dec - 01 Jan Alaska Airlines
20 Dec - 30 Dec Turkish Airlines
07 Dec - 06 Jan Delta
21 Dec - 28 Dec Icelandair

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

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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