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Flight Reliability

DL 1135 · Delta Air Lines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and DL 1135 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

67%
Arrive within 15 minutes
23 min
Average arrival delay
0.6%
Cancelled
2 min
Median arrival delay

Based on 362 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon71%(51 flights)
  • Tue77%(51 flights)
  • Wed65%(52 flights)
  • Thu69%(51 flights)
  • Fri54%(50 flights)
  • Sat67%(52 flights)
  • Sun64%(53 flights)
On-time by departure window
  • 3–6 PM64%(250 flights)
  • 6–9 PM73%(110 flights)
On-time trend by month
81%
May

Jun 60% → May 81% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202560%30
July 202555%31
August 202574%31
September 202587%30
October 202560%30
November 202571%28
December 202560%30
January 202655%31
February 202654%28
March 202673%30
April 202670%30
May 202681%31
Departures on time
67%
Diverted
0%
Flights flown
360
Months covered
12

Keep nerding

Based on 362 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.