Cheapest return flights from Seattle to Barcelona in May from $593

Best time to book flights for Seattle (SEA) to Barcelona (BCN) flights at AirHint

AirHint found the following cheapest return flights from Seattle (SEA) to Barcelona (BCN) in May 2025 (see full year).

Return flights

05 May - 21 May Aer Lingus
03 May - 08 May Iberia
05 May - 10 May American Airlines
05 May - 11 May British Airways
11 May - 20 May Icelandair
13 May - 23 May Icelandair
30 May - 06 Jun WestJet
11 May - 18 May Icelandair
20 May - 16 Jun Turkish Airlines
10 May - 17 May Frontier Airlines
18 May - 25 May Icelandair
26 May - 15 Jun Turkish Airlines
17 May - 24 May United

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

Skyscanner

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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