DL4100 SeattleSEA · 17:47 San JoseSJC · 20:13
DL4100 by Delta Air Lines flies from Seattle (SEA) to San Jose (SJC) for the Sat, Sep 5 departure.
en route from SEA to SJC
board checked 46m ago · checking again in 45s
Board estimate · gate and arrival times.
Where the minutes go
last 3 operations · gate push → arrivalThe bar is how late it left the gate; the ring is where it actually arrived. Board clocks, not estimates.
The route today
live boardsWeather lens
Delay & cancellation outlook for this flight
Measured, 90-day sampleConditions at SEA and SJC 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.
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 San Jose flights today
same route · Delta Air LinesIf DL4100 is cancelled, these are the other Delta Air Lines nonstop flights from Seattle to San Jose 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 DL4100 actually runs
Pro Flight Search has tracked every published board update for DL4100 across the SEA and SJC boards: schedule changes, gate pushes and actual clocks. Early read — pattern not clear yet. Only 3 completed legs so far: landed +1 min. Not enough to call it.
The verdict above is that record speaking, so it reflects how DL4100 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: N307SY, N604CZ.
Board clocks recorded as SEA and SJC published them.
Planning around DL4100? Will a delayed flight be cancelled? · Do planes make up time in the air? · How we measure
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Pro Flight Search — DL4100 Seattle to San Jose on-time performance, measured from the SEA and SJC airport boards.
https://proflightsearch.com/flight/DL4100
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