Cheapest return flights from Seattle (SEA) to Barcelona (BCN), December

20 dates in December, from $ 601. Book in one tap, or check whether to buy now or wait.

One-wayReturn
Dates, airline, and price
Dates Airline Price
2 Dec 9 Dec Icelandair
14 Dec 22 Dec Icelandair
5 Dec 15 Dec Icelandair
3 Dec 16 Dec Frontier Airlines
31 Dec 7 Jan 2027 Icelandair
24 Dec 31 Dec Icelandair
22 Dec 10 Jan 2027 Frontier Airlines
29 Dec 5 Jan 2027 Turkish Airlines
23 Dec 30 Dec Air Canada
20 Dec 10 Jan 2027 Alaska Airlines
14 Dec 20 Dec Delta
21 Dec 10 Jan 2027 Alaska Airlines
17 Dec 27 Dec Alaska Airlines
19 Dec 10 Jan 2027 Alaska Airlines
28 Dec 4 Jan 2027 Alaska Airlines
25 Dec 1 Jan 2027 Icelandair
21 Dec 28 Dec Turkish Airlines
27 Dec 3 Jan 2027 Turkish Airlines
19 Dec 26 Dec Alaska Airlines
25 Dec 2 Jan 2027 Icelandair
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Deals for one-way flights from Seattle to Barcelona in December.

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Updated Oct 11, 2026.

About these fares

These results come from our latest search across airlines for your currency. Prices change quickly and are not locked until you complete booking—always confirm the total and fare rules on the partner site.

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