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Flight Reliability

DL 1279 · Delta Air Lines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and DL 1279 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

91%
Arrive within 15 minutes
4 min early
Average arrival delay
1.5%
Cancelled
14 min early
Median arrival delay

Based on 654 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon86%(93 flights)
  • Tue93%(91 flights)
  • Wed97%(92 flights)
  • Thu89%(92 flights)
  • Fri96%(91 flights)
  • Sat87%(92 flights)
  • Sun89%(93 flights)
On-time by departure window
  • 6–9 AM92%(357 flights)
  • 9 AM–12 PM89%(287 flights)
On-time trend by month
89%
May

Jun 92% → May 89% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202592%60
July 202579%62
August 202588%59
September 2025100%60
October 2025100%35
November 202596%27
December 202591%43
January 202683%60
February 202691%56
March 202693%60
April 202697%60
May 202689%62
Departures on time
91%
Diverted
0%
Flights flown
644
Months covered
12

Keep nerding

Based on 654 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.