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Flight Reliability

DL 2978 · Delta Air Lines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and DL 2978 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
5 min early
Average arrival delay
2.6%
Cancelled
10 min early
Median arrival delay

Based on 686 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon88%(98 flights)
  • Tue88%(96 flights)
  • Wed90%(100 flights)
  • Thu94%(100 flights)
  • Fri90%(98 flights)
  • Sat97%(78 flights)
  • Sun85%(98 flights)
On-time by departure window
  • 6–9 AM92%(88 flights)
  • 9 AM–12 PM91%(419 flights)
  • 12–3 PM86%(161 flights)
On-time trend by month
97%
May

Jun 88% → May 97% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202588%58
July 202590%60
August 202593%59
September 202589%54
October 202580%61
November 202591%58
December 202581%36
January 202688%50
February 202696%56
March 202693%56
April 202690%58
May 202697%62
Departures on time
89%
Diverted
0%
Flights flown
668
Months covered
12

Keep nerding

Based on 686 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.