Air FranceAF
Flights AF3577 11:10 We Fr Su
live
Direct flights from Seattle (SEA) to Barcelona (BCN): 9 nonstop departures observed each week across 3 airlines. The nonstop covers 8,730 km, an estimated 11 hours 42 minutes in the air. Measured by Pro Flight Search from live flight boards at Seattle and Barcelona. Updated 1 November 2026 at 22:48 UTC.
SEA
Seattle
busy · +19
BCN
Barcelona
smooth · +0
8,730 km · ~11h 42m est.
Running clean · 3 airlines · 9x weekly · nonstop
87 / 100
route health from live SEA and BCN delay boards
Flight time~11h 42mestimated from route distance
Weekly departures9x3 direct airlines on the leg
The week
scheduled departures · origin local time06121824
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Air FranceDelta Air LinesKLM
Each mark is a scheduled departure at its origin-local time, observed operating in the last 7 days. Today is highlighted.
Who flies it
observed on the boards · 7 daysDelta Air LinesDL
Flights DL248 15:30 Tu Th Su
KLMKL
Flights KL8211 11:10 We Fr Su
Airports right now
live boardsWeather lens
Conditions are tightest at BCN: a 34% chance of a 15+ minute delay. In this weather, the more delayed of the two airports is typically about +10 min. Both figures come from the two airports' delay records in similar weather. See live delays → · Weather risk by airport →
next sweep in 120s
How the Seattle to Barcelona route actually runs
Pro Flight Search records official board updates for nonstop SEA to BCN flights through the day: schedules, estimates, gate pushes and actual departures. The verdict above comes from operated flights, so it reflects what this route does rather than what the timetable promises.
Planning around a delay? Live airport delays · Weather delay risk map · Will a delayed flight be cancelled? · Do planes make up time in the air? · How we measure
Cite this data
Journalists, bloggers, and researchers may cite this page with attribution and a link to Pro Flight Search.
Suggested citation
Pro Flight Search: Seattle (SEA) to Barcelona (BCN) route reliability, measured from operated flights on official airport boards.
Canonical URL
How we measure this →
https://proflightsearch.com/search-flights/SEA-BCN
SEA to BCN questions
Is SEA–BCN running on time right now?
Smooth skies ahead. The departure side at SEA is the weaker end, route health score 87/100. The airports section above carries the live status and delay window at both ends.
How long is the flight from SEA to BCN?
Great-circle distance is 8,730 km. With typical jet cruise speed plus taxi, climb and descent, expect roughly 646–778 min gate-to-gate on this route.
How often does SEA–BCN fly?
3 carriers operate this route, around 9 flights a week between them. Compare carrier days and times in the airline list above.
What does the route health score measure?
A blend of departure-side delay at SEA and arrival-side delay at BCN, computed from rolling delay windows (refreshed every 40 minutes) with a daily-rollup fallback. Current MVFR, IFR, or LIFR endpoint weather caps the score when flight rules can limit throughput. Higher is healthier: 100 means operations are clean at both ends.
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