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Flight Reliability

DL 2004 · Delta Air Lines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and DL 2004 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

70%
Arrive within 15 minutes
13 min
Average arrival delay
2.4%
Cancelled
6 min early
Median arrival delay

Based on 534 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon67%(72 flights)
  • Tue72%(76 flights)
  • Wed66%(74 flights)
  • Thu71%(75 flights)
  • Fri69%(71 flights)
  • Sat76%(74 flights)
  • Sun71%(77 flights)
On-time by departure window
  • 6–9 AM87%(23 flights)
  • 9 AM–12 PM96%(25 flights)
  • 12–3 PM64%(171 flights)
  • 3–6 PM83%(107 flights)
  • 6–9 PM63%(193 flights)
On-time trend by month
96%
May

Jun 47% → May 96% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202547%58
July 202541%59
August 202555%62
September 202575%60
October 202579%62
November 202575%52
December 202581%43
February 202682%17
March 202689%54
April 2026100%24
May 202696%25
Departures on time
70%
Diverted
0.4%
Flights flown
519
Months covered
12

Keep nerding

Based on 534 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.