Southwest AirlinesWN
Flights WN4840 varies Mo Tu We Th Fr Sa · WN1543 08:00 Mo Su
live
Direct flights from Dallas (DAL) to Seattle (SEA): 8 nonstop departures observed each week across 1 airline. No cancellations were recorded across the 7 tracked flights. The nonstop covers 2,684 km, an estimated 3 hours 56 minutes in the air. Measured by Pro Flight Search from live flight boards at Dallas and Seattle. Updated 2 November 2026 at 14:22 UTC.
Today, DAL → SEA
Mon 2 Nov · local times- 08:00 WN1543Southwest On scheduleT1 SEA est. 10:13sched 10:30
Checked DAL board 06:18 · SEA board 06:22
DAL
Dallas
smooth · +8
SEA
Seattle
smooth · +0
2,684 km · ~3h 56m est.
Running clean · 1 airline · 8x weekly · nonstop
94 / 100
route health from live DAL and SEA delay boards
0 of 7 tracked legs cancelled in the sample. Will a delayed flight be cancelled? →
Flight time~3h 56mestimated from route distance
Weekly departures8x1 direct airline on the leg
The week
scheduled departures · origin local time06121824
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Southwest 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 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
Conditions are tightest at DAL: a 43% chance of a 15+ minute delay. In this weather, the more delayed of the two airports is typically about +13 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 Dallas to Seattle route actually runs
Pro Flight Search records official board updates for nonstop DAL 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: Dallas (DAL) to Seattle (SEA) route reliability, measured from operated flights on official airport boards.
Canonical URL
How we measure this →
https://proflightsearch.com/search-flights/DAL-SEA
DAL to SEA questions
Is DAL–SEA running on time right now?
Smooth skies ahead. The departure side at DAL is the weaker end, route health score 94/100. The airports section above carries the live status and delay window at both ends.
How long is the flight from DAL to SEA?
Great-circle distance is 2,684 km. With typical jet cruise speed plus taxi, climb and descent, expect roughly 219–260 min gate-to-gate on this route.
How often does DAL–SEA fly?
Southwest Airlines runs the route with about 8 flights a week (daily). 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 DAL 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.
.