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Flight Reliability

DL 3100 · Delta Air Lines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and DL 3100 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

93%
Arrive within 15 minutes
6 min early
Average arrival delay
2.1%
Cancelled
11 min early
Median arrival delay

Based on 678 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon88%(98 flights)
  • Tue95%(94 flights)
  • Wed94%(94 flights)
  • Thu95%(95 flights)
  • Fri94%(98 flights)
  • Sat87%(87 flights)
  • Sun95%(98 flights)
On-time by departure window
  • 6–9 AM92%(331 flights)
  • 9 AM–12 PM93%(333 flights)
On-time trend by month
94%
May

Jun 90% → May 94% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202590%59
July 202589%62
August 202596%50
September 202596%44
October 202595%59
November 202589%53
December 202587%54
January 202691%54
February 202694%50
March 202695%57
April 202697%60
May 202694%62
Departures on time
91%
Diverted
0%
Flights flown
664
Months covered
12

Keep nerding

Based on 678 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.