DL1239 SeattleSEA · 19:59 Salt Lake CitySLC · 23:08
DL1239 by Delta Air Lines flies from Seattle (SEA) to Salt Lake City (SLC) for the Thu, Sep 24 departure.
departs SEA · on schedule
board checked 15m ago · checking again in 45s
The route today
live boardsWeather lens
Delay & cancellation outlook for this flight
Early read, sample still buildingConditions at SEA and SLC are near their clear-air norm right now, so this reflects the route's recent baseline rather than a weather penalty. For this route and airline, under conditions like today's, over the last 90 days. This route's tracked sample is still thin — treat these as an early read, not a precise forecast.
Pro Flight Search tracking, 90 days · the weather × delay correlation study → · live weather risk by airport →
When it flies
scheduled departuresEach mark is a scheduled departure at its origin-local time. Today is highlighted.
Other Seattle to Salt Lake City flights today
same route · Delta Air LinesIf DL1239 is cancelled, these are the other Delta Air Lines nonstop flights from Seattle to Salt Lake City on the same day, with scheduled departure times in SEA local time. Most flights posting a delay still operate — rebooking usually only beats a very large posted delay. Every airline on this route →
How DL1239 actually runs
Pro Flight Search has tracked every published board update for DL1239 across the SEA and SLC boards: schedule changes, gate pushes and actual clocks. Early read — pattern not clear yet. Only 2 completed legs so far: landed +51 min. Not enough to call it.
The verdict above is that record speaking, so it reflects how DL1239 operates rather than what the timetable promises. Numbers refresh as new flights operate.
How this operation is measured
Board log
scheduled → actual, per operationAircraft
Recent tails: N603DN, N910DU.
Board clocks recorded as SEA and SLC published them.
Planning around DL1239? Will a delayed flight be cancelled? · Do planes make up time in the air? · How we measure
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Pro Flight Search — DL1239 Seattle to Salt Lake City on-time performance, measured from the SEA and SLC airport boards.
https://proflightsearch.com/flight/DL1239
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