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Flight Reliability

DL 4236 · Delta Air Lines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and DL 4236 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

80%
Arrive within 15 minutes
12 min
Average arrival delay
1.3%
Cancelled
11 min early
Median arrival delay

Based on 528 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon80%(100 flights)
  • Tue90%(10 flights)
  • Wed—(6 flights)
  • Thu89%(100 flights)
  • Fri82%(102 flights)
  • Sat73%(102 flights)
  • Sun78%(99 flights)
On-time by departure window
  • 12–3 PM80%(244 flights)
  • 3–6 PM83%(230 flights)
  • 6–9 PM73%(45 flights)
On-time trend by month
92%
May

Jun 86% → May 92% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202586%43
July 202570%40
August 202585%46
September 202581%42
October 202593%44
November 202581%42
December 202555%42
January 202676%46
February 202675%40
March 202686%42
April 202681%42
May 202692%50
Departures on time
80%
Diverted
0.4%
Flights flown
519
Months covered
12

Keep nerding

Based on 528 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.