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Flight Reliability

DL 791 · Delta Air Lines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and DL 791 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
3 min early
Average arrival delay
3.5%
Cancelled
13 min early
Median arrival delay

Based on 626 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon84%(80 flights)
  • Tue79%(84 flights)
  • Wed75%(84 flights)
  • Thu83%(89 flights)
  • Fri84%(86 flights)
  • Sat90%(86 flights)
  • Sun78%(89 flights)
On-time by departure window
  • 6–9 AM84%(352 flights)
  • 9 AM–12 PM78%(111 flights)
  • 12–3 PM79%(135 flights)
On-time trend by month
89%
May

Jun 76% → May 89% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202576%53
July 202582%60
August 202584%61
September 202593%59
October 202594%34
November 202569%51
December 202565%51
January 202676%33
February 202680%40
March 202685%59
April 202688%42
May 202689%55
Departures on time
83%
Diverted
1.0%
Flights flown
598
Months covered
12

Keep nerding

Based on 626 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.