DL644 HoustonIAH · 08:05 AtlantaATL · 11:10
DL644 by Delta Air Lines flies from Houston (IAH) to Atlanta (ATL) for the Wed, Aug 19 departure.
departs IAH · 59 min late
board checked 20m ago · checking again in 45s
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 IAH 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.
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 Houston to Atlanta flights today
same route · Delta Air LinesIf DL644 is cancelled, these are the other Delta Air Lines nonstop flights from Houston to Atlanta on the same day, with scheduled departure times in IAH local time. Most flights posting a delay still operate — rebooking usually only beats a very large posted delay. Every airline on this route →
How DL644 actually runs
Pro Flight Search has tracked every published board update for DL644 across the IAH and ATL boards: schedule changes, gate pushes and actual clocks. Early read — pattern not clear yet. Only 3 completed legs so far: left a little late (~6 min) but landed about 24 min early. Not enough to call it.
The verdict above is that record speaking, so it reflects how DL644 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: N304DN, N313DN.
Board clocks recorded as IAH and ATL published them.
Planning around DL644? Will a delayed flight be cancelled? · Do planes make up time in the air? · How we measure
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Pro Flight Search — DL644 Houston to Atlanta on-time performance, measured from the IAH and ATL airport boards.
https://proflightsearch.com/flight/DL644
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