Cheapest return flights from Seattle to Barcelona in April from $477

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

Return flights

22 Apr - 29 Apr British Airways
27 Apr - 04 May Iberia
26 Apr - 03 May British Airways
28 Apr - 12 May Aer Lingus
17 Apr - 25 Apr British Airways
25 Apr - 02 May Iberia
26 Apr - 08 May United
24 Apr - 01 May Iberia
06 Apr - 13 Apr Icelandair
05 Apr - 12 Apr Turkish Airlines
04 Apr - 11 Apr Icelandair
02 Apr - 09 Apr British Airways
03 Apr - 10 Apr Iberia

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

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