Cheapest return flights from Seattle to Barcelona in May from $550

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

Return flights

05 May - 26 May Condor
07 May - 19 May Aer Lingus
12 May - 24 May Condor
11 May - 17 May Condor
16 May - 30 May Condor
14 May - 25 May Condor
01 May - 10 May Aer Lingus
19 May - 26 May Condor
14 May - 31 May Condor
23 May - 07 Jun Condor
12 May - 24 May Air France direct
13 May - 06 Jun American Airlines
23 May - 07 Jun Air France direct

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

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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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