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Flight Reliability

DL 1248 · Delta Air Lines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and DL 1248 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

85%
Arrive within 15 minutes
2 min
Average arrival delay
2.2%
Cancelled
10 min early
Median arrival delay

Based on 695 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon80%(102 flights)
  • Tue84%(101 flights)
  • Wed85%(100 flights)
  • Thu90%(97 flights)
  • Fri89%(100 flights)
  • Sat87%(84 flights)
  • Sun81%(94 flights)
On-time by departure window
  • 6–9 AM88%(16 flights)
  • 9 AM–12 PM86%(494 flights)
  • 12–3 PM82%(156 flights)
  • 6–9 PM67%(12 flights)
On-time trend by month
98%
May

Jun 76% → May 98% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202576%54
July 202587%61
August 202595%62
September 202593%60
October 202589%62
November 202592%59
December 202583%47
January 202678%54
February 202680%54
March 202670%54
April 202676%54
May 202698%57
Departures on time
83%
Diverted
0.3%
Flights flown
678
Months covered
12

Keep nerding

Based on 695 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.