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Flight Reliability

DL 2129 · Delta Air Lines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and DL 2129 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

82%
Arrive within 15 minutes
5 min
Average arrival delay
1.0%
Cancelled
6 min early
Median arrival delay

Based on 729 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon78%(102 flights)
  • Tue89%(103 flights)
  • Wed83%(103 flights)
  • Thu83%(103 flights)
  • Fri79%(103 flights)
  • Sat79%(103 flights)
  • Sun84%(103 flights)
On-time by departure window
  • 6–9 AM82%(194 flights)
  • 9 AM–12 PM91%(165 flights)
  • 12–3 PM77%(336 flights)
  • 3–6 PM88%(25 flights)
On-time trend by month
92%
May

Jun 85% → May 92% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202585%60
July 202582%60
August 202581%62
September 202590%59
October 202594%62
November 202588%60
December 202566%59
January 202661%62
February 202679%56
March 202678%58
April 202688%60
May 202692%62
Departures on time
85%
Diverted
0.3%
Flights flown
720
Months covered
12

Keep nerding

Based on 729 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.