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Flight Reliability

DL 4043 · Delta Air Lines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and DL 4043 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

84%
Arrive within 15 minutes
2 min
Average arrival delay
0.2%
Cancelled
7 min early
Median arrival delay

Based on 439 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon85%(65 flights)
  • Tue89%(66 flights)
  • Wed86%(66 flights)
  • Thu86%(69 flights)
  • Fri81%(68 flights)
  • Sat89%(36 flights)
  • Sun78%(67 flights)
On-time by departure window
  • 9 AM–12 PM—(9 flights)
  • 12–3 PM—(4 flights)
  • 3–6 PM88%(275 flights)
  • 6–9 PM78%(149 flights)
On-time trend by month
95%
May

Jun 71% → May 95% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202571%48
July 202573%51
August 202567%51
September 202596%47
October 202589%28
November 202595%20
December 2025100%19
January 202690%20
February 202685%39
March 202688%33
April 202692%26
May 202695%55
Departures on time
87%
Diverted
0.2%
Flights flown
437
Months covered
12

Keep nerding

Based on 439 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.