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Flight Reliability

DL 4025 · Delta Air Lines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and DL 4025 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

76%
Arrive within 15 minutes
23 min
Average arrival delay
1.5%
Cancelled
7 min early
Median arrival delay

Based on 268 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon76%(41 flights)
  • Tue68%(40 flights)
  • Wed70%(40 flights)
  • Thu79%(38 flights)
  • Fri81%(41 flights)
  • Sat85%(20 flights)
  • Sun79%(42 flights)
On-time by departure window
  • 6–9 AM75%(24 flights)
  • 9 AM–12 PM78%(23 flights)
  • 12–3 PM—(2 flights)
  • 3–6 PM75%(171 flights)
  • 6–9 PM81%(41 flights)
  • 9 PM–12 AM—(1 flights)
On-time trend by month
100%
May

Jun 74% → May 100% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202574%39
October 202579%38
December 202544%32
January 202682%27
February 202674%27
March 202676%29
April 202676%29
May 2026100%31
Departures on time
74%
Diverted
0.7%
Flights flown
262
Months covered
10

Keep nerding

Based on 268 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.