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Flight Reliability

DL 1134 · Delta Air Lines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and DL 1134 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

69%
Arrive within 15 minutes
19 min
Average arrival delay
2.5%
Cancelled
2 min early
Median arrival delay

Based on 487 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon70%(71 flights)
  • Tue63%(72 flights)
  • Wed60%(72 flights)
  • Thu73%(69 flights)
  • Fri75%(67 flights)
  • Sat80%(55 flights)
  • Sun67%(69 flights)
On-time by departure window
  • 6–9 AM78%(59 flights)
  • 9 AM–12 PM86%(29 flights)
  • 12–3 PM69%(124 flights)
  • 3–6 PM66%(189 flights)
  • 6–9 PM65%(74 flights)
On-time trend by month
65%
May

Jun 57% → May 65% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202557%30
July 202571%31
August 202587%31
September 202578%41
October 202558%55
November 202562%52
December 202551%41
January 202677%30
February 202671%28
March 202666%53
April 202687%60
May 202665%23
Departures on time
71%
Diverted
0%
Flights flown
475
Months covered
12

Keep nerding

Based on 487 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.