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Flight Reliability

DL 1123 · Delta Air Lines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and DL 1123 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

68%
Arrive within 15 minutes
18 min
Average arrival delay
0.8%
Cancelled
1 min early
Median arrival delay

Based on 380 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon66%(53 flights)
  • Tue78%(54 flights)
  • Wed69%(54 flights)
  • Thu76%(53 flights)
  • Fri57%(53 flights)
  • Sat64%(55 flights)
  • Sun67%(55 flights)
On-time by departure window
  • 9 AM–12 PM63%(16 flights)
  • 12–3 PM82%(146 flights)
  • 6–9 PM58%(190 flights)
  • 9 PM–12 AM60%(25 flights)
On-time trend by month
60%
May

Jun 57% → May 60% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202557%30
July 202553%30
August 202577%31
September 202583%30
October 202590%31
November 202597%29
December 202556%43
January 202651%35
February 202679%28
March 202653%30
April 202667%30
May 202660%30
Departures on time
66%
Diverted
0%
Flights flown
377
Months covered
12

Keep nerding

Based on 380 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.