Cheapest return SEA–BCN flights, May

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

Return flights

25 May - 01 Jun British Airways
24 May - 31 May British Airways
31 May - 02 Jun Condor
28 May - 01 Jun Condor
23 May - 07 Jun Condor
27 May - 31 May Icelandair
28 May - 31 May Condor
23 May - 07 Jun Air France direct
28 May - 31 May Air France direct
21 May - 24 May Delta direct

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

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