$574 Cheap KLM flights Seattle (SEA) to Barcelona (BCN)

View $574 flight on Wed, Mar 18, 2026Opens in a new window
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$574 Cheap KLM flights Seattle (SEA) to Barcelona (BCN)

Prices were available within the past 7 days and start at $574 for one-way flights and $508 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

KLM
Fri, Jan 16 - Fri, Jan 23
SEA
Seattle
BCN
Barcelona
$508 Roundtrip, found 5 hours ago
$508
Roundtrip
found 5 hours ago
Select KLM flight, departing Fri, Jan 16 from Seattle to Barcelona, returning Fri, Jan 23, priced at $508 found 5 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, Swiss International Air Lines, TAP Portugal, Turkish Airlines, United, Virgin Atlantic, WestJet
Popular airline
British Airways
Distance
5423 mi
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