DL4439 SacramentoSMF · 11:30 SeattleSEA · 13:45
DL4439 by Delta Air Lines flies from Sacramento (SMF) to Seattle (SEA) for the Mon, Nov 9 departure.
departs SMF · 7 min late
The route today
live boardsWeather lens
Delay & cancellation outlook for this flight
Measured, 90-day sampleConditions at SMF and SEA are near their clear-air norm right now, so this reflects the route's recent baseline rather than a weather penalty. These figures come from both airports' records under conditions like today's, over the last 90 days.
Pro Flight Search tracking, 90 days · the weather × delay correlation study → · live weather risk by airport →
Tomorrow at Sacramento
ForecastTue 10 Nov, local date
Forecast: GateWeather · incl. data from ECMWF (CC BY 4.0, modified) · Expected values for tomorrow from a forecast model, kept apart from today's measured figures.
Tomorrow at Seattle
ForecastTue 10 Nov, local date
- 97% chance of rain
Forecast: GateWeather · incl. data from ECMWF (CC BY 4.0, modified) · Expected values for tomorrow from a forecast model, kept apart from today's measured figures.
When it flies
scheduled departuresEach mark is a scheduled departure at its origin-local time. Today is highlighted.
Other Sacramento to Seattle flights today
same route · Delta Air LinesIf DL4439 is cancelled, these are the other Delta Air Lines nonstop flights from Sacramento to Seattle on the same day, with scheduled departure times in SMF local time. Most flights that show a delay still operate. Rebooking usually helps only when that delay is very large. Every airline on this route →
How DL4439 actually runs
Pro Flight Search has tracked every published board update for DL4439 across the SMF and SEA boards: schedule changes, gate pushes and actual clocks. Early read: no clear pattern yet. Only 1 completed leg so far: departed +6 min. Not enough to call it.
The verdict above is that record speaking, so it reflects how DL4439 operates rather than what the timetable promises. Numbers refresh as new flights operate.
How this operation is measured
Board log
scheduled → actual, per operationBoard clocks recorded as SMF and SEA published them.
Planning around DL4439? Will a delayed flight be cancelled? · Do planes make up time in the air? · How we measure
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Pro Flight Search: DL4439 Sacramento to Seattle on-time performance, measured from the SMF and SEA airport boards.
https://proflightsearch.com/flight/DL4439
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