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Flight Reliability

DL 3504 · Delta Air Lines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and DL 3504 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
7 min early
Average arrival delay
0%
Cancelled
14 min early
Median arrival delay

Based on 310 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon98%(45 flights)
  • Tue98%(45 flights)
  • Wed93%(45 flights)
  • Thu86%(43 flights)
  • Fri80%(44 flights)
  • Sat93%(42 flights)
  • Sun89%(45 flights)
On-time by departure window
  • 6–9 AM88%(25 flights)
  • 9 AM–12 PM88%(24 flights)
  • 12–3 PM92%(60 flights)
  • 6–9 PM92%(200 flights)
On-time trend by month
92%
May

Jun 93% → May 92% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202593%29
July 202587%31
August 202584%31
September 202597%30
October 202587%31
November 202597%29
December 2025100%19
March 202696%24
April 202685%48
May 202692%37
Departures on time
91%
Diverted
0.3%
Flights flown
309
Months covered
10

Keep nerding

Based on 310 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.