Cheapest return flights from Seattle to Barcelona in March from $458

AirHint found the following cheapest return flights from Seattle (SEA) to Barcelona (BCN) in March 2026 (see full year).

Return flights

10 Mar - 24 Mar British Airways
13 Mar - 20 Mar British Airways
12 Mar - 18 Mar Air Canada
18 Mar - 23 Mar British Airways
22 Mar - 30 Mar Aer Lingus
22 Mar - 01 Apr Air Canada
22 Mar - 29 Mar Lufthansa
30 Mar - 10 Apr Turkish Airlines
21 Mar - 01 Apr Turkish Airlines
06 Mar - 13 Mar Icelandair
27 Mar - 05 Apr Alaska Airlines
17 Mar - 28 Mar Air Canada
15 Mar - 22 Mar Icelandair
25 Mar - 28 Mar Delta

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

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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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