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Flight Reliability

DL 1651 · Delta Air Lines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and DL 1651 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

74%
Arrive within 15 minutes
11 min
Average arrival delay
2.7%
Cancelled
6 min early
Median arrival delay

Based on 332 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon72%(47 flights)
  • Tue79%(47 flights)
  • Wed76%(46 flights)
  • Thu76%(45 flights)
  • Fri72%(47 flights)
  • Sat74%(46 flights)
  • Sun67%(45 flights)
On-time by departure window
  • 6–9 AM70%(70 flights)
  • 12–3 PM—(7 flights)
  • 3–6 PM73%(132 flights)
  • 6–9 PM67%(24 flights)
  • 9 PM–12 AM79%(90 flights)
On-time trend by month
60%
May

Jun 71% → May 60% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202571%21
July 202565%31
August 202590%31
September 2025100%18
October 202569%26
November 202570%27
December 202554%26
January 202679%29
February 202680%25
March 202666%29
April 202687%30
May 202660%30
Departures on time
75%
Diverted
0%
Flights flown
323
Months covered
12

Keep nerding

Based on 332 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.