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Flight Reliability

DL 1791 · Delta Air Lines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and DL 1791 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

60%
Arrive within 15 minutes
29 min
Average arrival delay
1.4%
Cancelled
7 min
Median arrival delay

Based on 357 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon54%(46 flights)
  • Tue64%(50 flights)
  • Wed65%(49 flights)
  • Thu63%(51 flights)
  • Fri56%(52 flights)
  • Sat74%(50 flights)
  • Sun46%(52 flights)
On-time by departure window
  • 12–3 PM63%(72 flights)
  • 3–6 PM60%(278 flights)
On-time trend by month
65%
May

Jun 43% → May 65% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202543%30
July 202565%31
October 202545%49
November 202562%50
December 202557%47
January 202670%20
February 202679%28
March 202665%31
April 202670%30
May 202665%31
Departures on time
69%
Diverted
0.6%
Flights flown
350
Months covered
11

Keep nerding

Based on 357 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.