Alaska AirlinesAS
Flights AS377 07:03 daily · AS348 09:03 daily · AS218 16:04 daily
live
Direct flights from Atlanta (ATL) to Seattle (SEA): 14 nonstop departures observed each week across 2 airlines. 40% of the last 10 operated flights arrived within 15 minutes of schedule. The median arrival is 18 minutes late. No cancellations were recorded across the 10 tracked flights. The nonstop covers 3,505 km, an estimated 5 hours 0 minutes in the air. Measured by Pro Flight Search from live flight boards at Atlanta and Seattle. Updated 11 September 2026 at 11:23 UTC.
ATL
Atlanta
busy · +16
SEA
Seattle
heavy · +30
3,505 km · ~5h 00m est.
Runs rough · 2 airlines · 14x weekly · nonstop
40% on time
of the last 10 operated ATL → SEA flights arrived within 15 minutes
Median arrival delay is +18 min. 0 of 10 tracked legs cancelled in the sample. Will a delayed flight be cancelled? →
Median arrival+18 minacross the last 10 operated legs
Flight time~5h 00mestimated from route distance
Weekly departures14x2 direct airlines on the leg
Cancelled0.0%recent route rate · 0 of 10
The week
scheduled departures · origin local time06121824
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Alaska AirlinesDelta Air Lines
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 daysHistory
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 ATL and SEA: 34% odds of a 15+ minute delay and around +2 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 Atlanta to Seattle route actually runs
Pro Flight Search records official board updates for nonstop ATL 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 — Atlanta (ATL) to Seattle (SEA) route reliability, measured from operated flights on official airport boards.
Canonical URL
How we measure this →
https://proflightsearch.com/search-flights/ATL-SEA
ATL to SEA questions
Is ATL–SEA running on time right now?
Mostly on schedule. The arrival side at SEA is the weaker end, route health score 69/100. The airports section above carries the live status and delay window at both ends.
Morning or evening flight on ATL–SEA?
Operators schedule morning departures around 07:03 and evening departures around 21:35 from ATL. Earlier flights typically land before destination-airport delays accumulate later in the day; check the SEA delay card to confirm conditions when you'd arrive.
How long is the flight from ATL to SEA?
Great-circle distance is 3,505 km. With typical jet cruise speed plus taxi, climb and descent, expect roughly 277–330 min gate-to-gate on this route.
How often does ATL–SEA fly?
2 carriers operate this route, around 77 flights a week between them. Compare carrier days and times in the airline list above.
.