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Flight Reliability

DL 665 · Delta Air Lines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and DL 665 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
1 min early
Average arrival delay
1.8%
Cancelled
8 min early
Median arrival delay

Based on 730 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon82%(103 flights)
  • Tue86%(102 flights)
  • Wed88%(102 flights)
  • Thu88%(100 flights)
  • Fri86%(101 flights)
  • Sat85%(100 flights)
  • Sun86%(102 flights)
On-time by departure window
  • 6–9 AM89%(54 flights)
  • 9 AM–12 PM88%(468 flights)
  • 12–3 PM81%(188 flights)
On-time trend by month
75%
May

Jun 81% → May 75% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202581%58
July 202597%60
August 202592%62
September 202590%60
October 202585%61
November 202581%59
December 202590%58
January 202676%58
February 202686%56
March 202690%57
April 202688%60
May 202675%61
Departures on time
86%
Diverted
1.0%
Flights flown
710
Months covered
12

Keep nerding

Based on 730 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.