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Flight Reliability

DL 3859 · Delta Air Lines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and DL 3859 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

95%
Arrive within 15 minutes
8 min early
Average arrival delay
1.4%
Cancelled
12 min early
Median arrival delay

Based on 728 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon89%(104 flights)
  • Tue97%(104 flights)
  • Wed95%(102 flights)
  • Thu94%(100 flights)
  • Fri96%(102 flights)
  • Sat95%(100 flights)
  • Sun96%(106 flights)
On-time by departure window
  • 9 AM–12 PM96%(461 flights)
  • 12–3 PM93%(257 flights)
On-time trend by month
97%
May

Jun 97% → May 97% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202597%60
July 202594%62
August 202594%62
September 202597%60
October 202598%62
November 202596%50
December 202595%62
January 202694%62
February 202688%56
March 202692%60
April 202697%60
May 202697%62
Departures on time
94%
Diverted
0%
Flights flown
718
Months covered
12

Keep nerding

Based on 728 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.