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Flight Reliability

DL 1423 · Delta Air Lines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and DL 1423 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

88%
Arrive within 15 minutes
3 min early
Average arrival delay
0.3%
Cancelled
10 min early
Median arrival delay

Based on 716 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon81%(104 flights)
  • Tue89%(104 flights)
  • Wed88%(96 flights)
  • Thu90%(104 flights)
  • Fri91%(103 flights)
  • Sat84%(96 flights)
  • Sun92%(106 flights)
On-time by departure window
  • 9 AM–12 PM87%(357 flights)
  • 12–3 PM89%(356 flights)
On-time trend by month
84%
May

Jun 97% → May 84% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202597%60
July 202592%62
August 202592%62
September 202593%60
October 202577%62
November 202587%60
December 202582%62
January 202684%62
February 202684%56
March 202688%60
April 202696%50
May 202684%57
Departures on time
87%
Diverted
0.1%
Flights flown
713
Months covered
12

Keep nerding

Based on 716 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.