Alaska AirlinesAS60% on time
Flights AS787 varies daily
live
Direct flights from Charleston (CHS) to Seattle (SEA): 9 nonstop departures observed each week across 2 airlines. 60% of the last 5 operated flights arrived within 15 minutes of schedule. The median arrival is 15 minutes late. No cancellations were recorded across the 5 tracked flights. The nonstop covers 3,879 km, an estimated 5 hours 28 minutes in the air. Measured by Pro Flight Search from live flight boards at Charleston and Seattle. Updated 15 September 2026 at 10:18 UTC.
CHS
Charleston
smooth · +5
SEA
Seattle
smooth · +2
3,879 km · ~5h 28m est.
Runs mixed · 2 airlines · 9x weekly · nonstop
60% on time
of the last 5 operated CHS → SEA flights arrived within 15 minutes
Median arrival delay is +15 min. 0 of 5 tracked legs cancelled in the sample. Will a delayed flight be cancelled? →
Median arrival+15 minacross the last 5 operated legs
Flight time~5h 28mestimated from route distance
Weekly departures9x2 direct airlines on the leg
The week
scheduled departures · origin local time06121824
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Alaska AirlinesSouthwest 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 daysSouthwest AirlinesWN
Flights WN1087 13:00 Tu We
History
operated legs · board outcomesActual board outcomes rather than schedules, paired departure and arrival per flight and day.
Full board history, day by day →
Airports right now
live boardsWeather lens
Current conditions put the pressure at CHS and SEA: 38% odds of a 15+ minute delay and around +5 min expected when it bites, measured from this route's own weather-matched delay history. See live delays → · Weather risk by airport →
next sweep in 120s
How the Charleston to Seattle route actually runs
Pro Flight Search records official board updates for nonstop CHS to SEA 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 — Charleston (CHS) to Seattle (SEA) route reliability, measured from operated flights on official airport boards.
Canonical URL
How we measure this →
https://proflightsearch.com/search-flights/CHS-SEA
CHS to SEA questions
Is CHS–SEA running on time right now?
Smooth skies ahead. The departure side at CHS is the weaker end, route health score 95/100. The airports section above carries the live status and delay window at both ends.
How long is the flight from CHS to SEA?
Great-circle distance is 3,879 km. With typical jet cruise speed plus taxi, climb and descent, expect roughly 304–362 min gate-to-gate on this route.
How often does CHS–SEA fly?
2 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 CHS and arrival-side delay at SEA, 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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