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Flight Reliability

DL 1004 · Delta Air Lines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and DL 1004 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

91%
Arrive within 15 minutes
5 min early
Average arrival delay
1.5%
Cancelled
12 min early
Median arrival delay

Based on 672 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon86%(95 flights)
  • Tue89%(93 flights)
  • Wed96%(94 flights)
  • Thu93%(96 flights)
  • Fri95%(94 flights)
  • Sat87%(90 flights)
  • Sun93%(98 flights)
On-time by departure window
  • 6–9 AM93%(189 flights)
  • 9 AM–12 PM91%(392 flights)
  • 12–3 PM87%(75 flights)
  • 3–6 PM—(4 flights)
On-time trend by month
93%
May

Jun 93% → May 93% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202593%59
July 202593%61
August 202594%50
September 202595%42
October 202598%52
November 202589%44
December 202583%60
January 202688%58
February 202691%56
March 202683%58
April 202695%60
May 202693%60
Departures on time
90%
Diverted
0.3%
Flights flown
660
Months covered
12

Keep nerding

Based on 672 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.