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

Return flights

02 Jun - 09 Jun	Condor
18 Jun - 03 Jul	Icelandair
06 Jun - 17 Jun	Icelandair
02 Jun - 14 Jun	Condor
13 Jun - 19 Jun	Condor
20 Jun - 12 Jul	Icelandair
18 Jun - 06 Jul	Icelandair
17 Jun - 08 Jul	Icelandair
17 Jun - 02 Jul	Condor
23 Jun - 05 Jul	Lufthansa
29 Jun - 06 Jul	Icelandair
24 Jun - 01 Jul	Icelandair
19 Jun - 26 Jun	Icelandair
14 Jun - 21 Jun	Alaska Airlines
02 Jun - 14 Jun	Air France	direct
06 Jun - 17 Jun	Air France	direct
04 Jun - 11 Jun	Icelandair
23 Jun - 05 Jul	Air France	direct
18 Jun - 03 Jul	Air France	direct
13 Jun - 19 Jun	Air France	direct

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

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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Cheapest return flights from Seattle to Barcelona in June from 702€

Return flights