Alaska AirlinesAS
Flights AS9420 08:16 Mo
live
Direct flights from Seattle (SEA) to Greensboro (GSO): 1 nonstop departure observed each week across 1 airline. The nonstop covers 3,681 km, an estimated 5 hours 13 minutes in the air. Measured by Pro Flight Search from live flight boards at Seattle and Greensboro. Updated 18 August 2026 at 05:09 UTC.
SEA
Seattle
smooth · +6
GSO
Greensboro
tracking
3,681 km · ~5h 13m est.
Running clean · 1 airline · 1x weekly · nonstop
90 / 100
route health from live SEA and GSO delay boards
Search live fares for this route →Flight time~5h 13mestimated from route distance
Weekly departures1x1 direct airline on the leg
Current nonstop fares
SEA → GSO · one way · economy · 1 adult
TodayChecking…Direct airline fares
TomorrowChecking…Direct airline fares
In one weekChecking…Direct airline fares
The week
scheduled departures · origin local time06121824
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Alaska Airlines
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 daysAirports right now
live boardsnext sweep in 120s
How the Seattle to Greensboro route actually runs
Pro Flight Search tracks every published board update for nonstop SEA to GSO flights: 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. Fares link straight to the operating airline with no markups.
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 Greensboro (GSO) route reliability, measured from operated flights on official airport boards.
Canonical URL
How we measure this →
https://proflightsearch.com/search-flights/SEA-GSO
SEA to GSO questions
Is SEA–GSO running on time right now?
Smooth skies ahead. The departure side at SEA is the weaker end, route health score 90/100. The airports section above carries the live status and delay window at both ends.
How long is the flight from SEA to GSO?
Great-circle distance is 3,681 km. With typical jet cruise speed plus taxi, climb and descent, expect roughly 290–346 min gate-to-gate on this route.
How often does SEA–GSO fly?
Alaska Airlines runs the route with about 1 flight a week (mon). Since one carrier owns the route, a single disruption tends to ripple through the day.
What does the route health score measure?
A blend of departure-side delay at SEA and arrival-side delay at GSO, 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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