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Flight Reliability

DL 4035 · Delta Air Lines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and DL 4035 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

73%
Arrive within 15 minutes
19 min
Average arrival delay
0.8%
Cancelled
9 min early
Median arrival delay

Based on 507 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon63%(79 flights)
  • Tue76%(78 flights)
  • Wed75%(77 flights)
  • Thu80%(76 flights)
  • Fri75%(76 flights)
  • Sat73%(41 flights)
  • Sun68%(76 flights)
On-time by departure window
  • 9 AM–12 PM88%(60 flights)
  • 12–3 PM76%(41 flights)
  • 3–6 PM69%(88 flights)
  • 6–9 PM71%(314 flights)
On-time trend by month
87%
May

Jun 66% → May 87% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202566%41
July 202543%49
August 202569%48
September 202585%41
October 202591%53
November 202572%46
December 202547%34
January 202673%52
February 202682%28
March 202683%42
April 202682%38
May 202687%31
Departures on time
73%
Diverted
0%
Flights flown
503
Months covered
12

Keep nerding

Based on 507 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.