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Flight Reliability

DL 1660 · Delta Air Lines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and DL 1660 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

86%
Arrive within 15 minutes
2 min early
Average arrival delay
1.3%
Cancelled
8 min early
Median arrival delay

Based on 673 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon90%(95 flights)
  • Tue86%(97 flights)
  • Wed90%(96 flights)
  • Thu80%(95 flights)
  • Fri88%(93 flights)
  • Sat83%(90 flights)
  • Sun82%(96 flights)
On-time by departure window
  • 12–3 PM85%(132 flights)
  • 3–6 PM85%(498 flights)
  • 6–9 PM97%(32 flights)
On-time trend by month
81%
May

Jun 73% → May 81% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202573%52
July 202573%62
August 202594%62
September 202595%60
October 202590%62
November 202588%33
December 202576%38
January 202687%61
February 202683%54
March 202688%58
April 202695%58
May 202681%62
Departures on time
85%
Diverted
0.3%
Flights flown
662
Months covered
12

Keep nerding

Based on 673 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.