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Flight Reliability

DL 5104 · Delta Air Lines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and DL 5104 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

83%
Arrive within 15 minutes
3 min
Average arrival delay
1.9%
Cancelled
9 min early
Median arrival delay

Based on 418 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon88%(57 flights)
  • Tue85%(65 flights)
  • Wed89%(63 flights)
  • Thu88%(58 flights)
  • Fri67%(54 flights)
  • Sat82%(56 flights)
  • Sun79%(57 flights)
On-time by departure window
  • 6–9 AM84%(85 flights)
  • 9 AM–12 PM91%(43 flights)
  • 12–3 PM83%(181 flights)
  • 3–6 PM76%(80 flights)
  • 6–9 PM86%(21 flights)
On-time trend by month
71%
May

Jun 100% → May 71% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 2025100%14
September 2025100%40
October 202593%60
November 202577%52
December 202573%40
January 202664%11
February 202682%27
March 202687%52
April 202680%56
May 202671%51
Departures on time
85%
Diverted
0%
Flights flown
410
Months covered
12

Keep nerding

Based on 418 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.