DL521 Los AngelesLAX · 07:35 Dallas-Fort WorthDFW · 12:40
DL521 by Delta Air Lines flies from Los Angeles (LAX) to Dallas-Fort Worth (DFW).
scheduled from LAX
Where the minutes go
last 6 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 −12 min · 0 cancelled · 6 operations tracked
The route today
live boardsWeather lens
Delay & cancellation outlook for this flight
Measured, 90-day sampleConditions at LAX and DFW 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 Los Angeles to Dallas-Fort Worth flights today
same route · Delta Air LinesIf DL521 is cancelled, these are the other Delta Air Lines nonstop flights from Los Angeles to Dallas-Fort Worth on the same day, with scheduled departure times in LAX local time. Most flights posting a delay still operate — rebooking usually only beats a very large posted delay. Every airline on this route →
How DL521 actually runs
Pro Flight Search has tracked every published board update for DL521 across the LAX and DFW boards: schedule changes, gate pushes and actual clocks. Usually lands ~12 min early. Based on 5 confirmed landings · 5/5 within 15 min of schedule.
The verdict above is that record speaking, so it reflects how DL521 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: N349NB, N365NB, N364NB, N338NB.
Board clocks recorded as LAX and DFW published them.
Planning around DL521? Will a delayed flight be cancelled? · Do planes make up time in the air? · How we measure
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Pro Flight Search — DL521 Los Angeles to Dallas-Fort Worth on-time performance, measured from the LAX and DFW airport boards.
https://proflightsearch.com/flight/DL521
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