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Flight Reliability

DL 4229 · Delta Air Lines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and DL 4229 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

87%
Arrive within 15 minutes
2 min early
Average arrival delay
1.8%
Cancelled
14 min early
Median arrival delay

Based on 728 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon84%(104 flights)
  • Tue86%(101 flights)
  • Wed84%(102 flights)
  • Thu88%(100 flights)
  • Fri86%(104 flights)
  • Sat91%(102 flights)
  • Sun88%(101 flights)
On-time by departure window
  • 6–9 AM94%(36 flights)
  • 9 AM–12 PM86%(678 flights)
On-time trend by month
100%
May

Jun 93% → May 100% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202593%60
July 202593%60
August 202581%62
September 202580%60
October 202597%62
November 202581%52
December 202566%62
January 202683%60
February 202689%56
March 202692%60
April 202685%58
May 2026100%62
Departures on time
88%
Diverted
0.1%
Flights flown
714
Months covered
12

Keep nerding

Based on 728 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.