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Flight Reliability

DL 4077 · Delta Air Lines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and DL 4077 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

88%
Arrive within 15 minutes
2 min early
Average arrival delay
0%
Cancelled
10 min early
Median arrival delay

Based on 254 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon80%(40 flights)
  • Tue98%(40 flights)
  • Wed95%(38 flights)
  • Thu89%(36 flights)
  • Fri87%(38 flights)
  • Sat82%(27 flights)
  • Sun83%(35 flights)
On-time by departure window
  • 6–9 AM—(1 flights)
  • 9 AM–12 PM—(4 flights)
  • 3–6 PM87%(136 flights)
  • 6–9 PM89%(113 flights)
On-time trend by month
86%
May

Jun 86% → May 86% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202586%14
December 202576%21
January 202681%43
February 202694%17
March 202684%45
April 2026100%56
May 202686%56
Departures on time
87%
Diverted
0%
Flights flown
254
Months covered
8

Keep nerding

Based on 254 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.