DL3940 Colorado SpringsCOS Salt Lake CitySLC · 10:14
DL3940 by Delta Air Lines flies from Colorado Springs (COS) to Salt Lake City (SLC) for the Thu, Sep 17 departure.
arrival expected at SLC · on schedule
board checked 138m ago · checking again in 45s
Where the minutes go
last 7 operations · gate push → arrivalThe bar is how late it left the gate; the ring is where it actually arrived. Board clocks, not estimates.
The last 30 days
arrival outcome per operationmedian arrival −21 min · 0 cancelled · 14 operations tracked
The route today
live boardsWhen it flies
scheduled departuresEach mark is a scheduled departure at its origin-local time. Today is highlighted.
How DL3940 actually runs
Pro Flight Search has tracked every published board update for DL3940 across the COS and SLC boards: schedule changes, gate pushes and actual clocks. Usually lands ~17 min early. Based on 13 confirmed landings · 13/13 within 15 min of schedule.
The verdict above is that record speaking, so it reflects how DL3940 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: N286SY, N282SY, N299SY, N281SY.
Board clocks recorded as COS and SLC published them.
Planning around DL3940? Will a delayed flight be cancelled? · Do planes make up time in the air? · How we measure
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Pro Flight Search — DL3940 Colorado Springs to Salt Lake City on-time performance, measured from the COS and SLC airport boards.
https://proflightsearch.com/flight/DL3940
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