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

Return flights

23 Jul - 13 Aug	Aer Lingus
29 Jul - 05 Aug	Aer Lingus
28 Jul - 13 Aug	Aer Lingus
30 Jul - 06 Aug	Aer Lingus
12 Jul - 17 Aug	Icelandair
28 Jul - 04 Aug	Aer Lingus
23 Jul - 30 Jul	Icelandair
27 Jul - 03 Aug	Icelandair
04 Jul - 12 Jul	Icelandair
04 Jul - 09 Jul	Icelandair
26 Jul - 02 Aug	Icelandair
24 Jul - 28 Jul	Icelandair
25 Jul - 28 Jul	Icelandair
24 Jul - 31 Jul	Icelandair
31 Jul - 07 Aug	Icelandair
25 Jul - 01 Aug	Icelandair
02 Jul - 09 Jul	Icelandair
11 Jul - 18 Jul	Icelandair
02 Jul - 08 Jul	Lufthansa
07 Jul - 14 Jul	Icelandair

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

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.

Book a cheap hotel in Barcelona

Cheap car rent in Barcelona

Cheapest return flights from Seattle to Barcelona in July from $591

Return flights