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Flight Reliability

DL 4028 · Delta Air Lines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and DL 4028 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

89%
Arrive within 15 minutes
2 min early
Average arrival delay
1.2%
Cancelled
12 min early
Median arrival delay

Based on 426 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon92%(61 flights)
  • Tue82%(61 flights)
  • Wed87%(60 flights)
  • Thu87%(60 flights)
  • Fri90%(58 flights)
  • Sat98%(63 flights)
  • Sun88%(58 flights)
On-time by departure window
  • 6–9 AM90%(216 flights)
  • 12–3 PM81%(42 flights)
  • 3–6 PM89%(97 flights)
  • 6–9 PM90%(62 flights)
  • 9 PM–12 AM—(4 flights)
On-time trend by month
80%
May

Jun 100% → May 80% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 2025100%30
July 202584%31
August 202587%31
September 202593%30
October 2025100%31
November 202593%30
December 202572%18
January 202693%54
February 202688%56
March 202688%60
April 202680%40
May 202680%10
Departures on time
89%
Diverted
0%
Flights flown
421
Months covered
12

Keep nerding

Based on 426 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.