$636 Cheap KLM flights Seattle (SEA) to Barcelona (BCN)

View $636 flight on Wed, Feb 18, 2026Opens in a new window

$636 Cheap KLM flights Seattle (SEA) to Barcelona (BCN)

Prices were available within the past 7 days and start at $636 for one-way flights and $536 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

KLM
Wed, Jan 14 - Wed, Jan 28
SEA
Seattle
BCN
Barcelona
$536 Roundtrip, found 3 hours ago
$536
Roundtrip
found 3 hours ago
Select KLM flight, departing Wed, Jan 14 from Seattle to Barcelona, returning Wed, Jan 28, priced at $536 found 3 hours ago

Travel information

Origin airport
Seattle - Tacoma Intl.
Destination airport
Barcelona Intl.
Airlines serving
Aer Lingus, Air Canada, Air Europa, Air France, Alaska Airlines, American Airlines, British Airways, Condor, Delta, Finnair, Iberia, Icelandair, KLM, Lufthansa, Scandinavian Airlines, Swiss International Air Lines, Turkish Airlines, United, Virgin Atlantic, WestJet
Popular airline
British Airways
Distance
5423 mi
*Available to One Key members.