Skip to content
WanderNerd
Check a flight

Flight Reliability

DL 664 · Delta Air Lines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and DL 664 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
6 min
Average arrival delay
1.7%
Cancelled
4 min early
Median arrival delay

Based on 726 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon84%(99 flights)
  • Tue82%(102 flights)
  • Wed86%(104 flights)
  • Thu85%(103 flights)
  • Fri83%(104 flights)
  • Sat75%(100 flights)
  • Sun79%(100 flights)
On-time by departure window
  • 9 AM–12 PM83%(357 flights)
  • 12–3 PM81%(355 flights)
On-time trend by month
79%
May

Jun 72% → May 79% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202572%60
July 202573%62
August 202589%61
September 202593%56
October 202587%61
November 202581%57
December 202588%58
January 202677%61
February 202680%54
March 202682%60
April 202687%60
May 202679%62
Departures on time
80%
Diverted
0.3%
Flights flown
712
Months covered
12

Keep nerding

Based on 726 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.