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Flight Reliability

DL 4126 · Delta Air Lines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and DL 4126 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

90%
Arrive within 15 minutes
4 min early
Average arrival delay
0%
Cancelled
13 min early
Median arrival delay

Based on 503 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon90%(73 flights)
  • Tue89%(71 flights)
  • Wed90%(71 flights)
  • Thu92%(71 flights)
  • Fri86%(73 flights)
  • Sat87%(70 flights)
  • Sun96%(71 flights)
On-time by departure window
  • 3–6 PM90%(356 flights)
  • 6–9 PM89%(144 flights)
On-time trend by month
85%
May

Jun 83% → May 85% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202583%30
July 202583%30
August 202590%29
September 2025100%30
October 202577%31
November 2025100%30
December 202593%27
January 202698%57
February 202691%54
March 202687%62
April 202692%60
May 202685%60
Departures on time
91%
Diverted
0.6%
Flights flown
500
Months covered
12

Keep nerding

Based on 503 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.