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Flight Reliability

DL 512 · Delta Air Lines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and DL 512 moved between routes during this period. Numbers below combine all of them, so treat them as background, not a verdict. For a cleaner answer, check the route you are actually flying.

Combined across all its routes

78%
Arrive within 15 minutes
7 min
Average arrival delay
2.2%
Cancelled
9 min early
Median arrival delay

Based on 727 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon84%(102 flights)
  • Tue77%(99 flights)
  • Wed82%(101 flights)
  • Thu77%(99 flights)
  • Fri74%(101 flights)
  • Sat72%(99 flights)
  • Sun81%(103 flights)
On-time by departure window
  • 12–3 PM84%(411 flights)
  • 3–6 PM71%(293 flights)
On-time trend by month
80%
May

Jun 58% → May 80% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202558%55
July 202583%60
August 202588%59
September 202578%59
October 202586%62
November 202573%60
December 202588%57
January 202668%60
February 202682%56
March 202674%58
April 202678%59
May 202680%59
Departures on time
76%
Diverted
1.0%
Flights flown
704
Months covered
12

Keep nerding

Based on 727 historical flights, because apparently we checked. Historical flight data: U.S. Bureau of Transportation Statistics, June 2025 – May 2026. Data through May 2026. How we calculate this.