DL640 San FranciscoSFO · 08:00 AtlantaATL · 15:31
DL640 by Delta Air Lines flies from San Francisco (SFO) to Atlanta (ATL) for the Sun, Oct 11 departure.
arrival expected at ATL · 2 min early
board checked 37m ago · checking again in 45s
Where the minutes go
last 4 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
Early read, sample still buildingConditions at SFO and ATL 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 San Francisco to Atlanta flights today
same route · Delta Air LinesIf DL640 is cancelled, these are the other Delta Air Lines nonstop flights from San Francisco to Atlanta on the same day, with scheduled departure times in SFO local time. Most flights posting a delay still operate — rebooking usually only beats a very large posted delay. Every airline on this route →
How DL640 actually runs
Pro Flight Search has tracked every published board update for DL640 across the SFO and ATL boards: schedule changes, gate pushes and actual clocks. Usually lands on time. Based on 4 confirmed landings · 4/4 within 15 min of schedule.
The verdict above is that record speaking, so it reflects how DL640 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: N590NW, N588NW, N595NW, N581NW.
Board clocks recorded as SFO and ATL published them.
Planning around DL640? Will a delayed flight be cancelled? · Do planes make up time in the air? · How we measure
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Pro Flight Search — DL640 San Francisco to Atlanta on-time performance, measured from the SFO and ATL airport boards.
https://proflightsearch.com/flight/DL640
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