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Flight Reliability

DL 3839 · Delta Air Lines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and DL 3839 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

90%
Arrive within 15 minutes
5 min early
Average arrival delay
0%
Cancelled
13 min early
Median arrival delay

Based on 361 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon91%(53 flights)
  • Tue87%(53 flights)
  • Wed96%(53 flights)
  • Thu79%(53 flights)
  • Fri89%(53 flights)
  • Sat98%(42 flights)
  • Sun91%(53 flights)
On-time by departure window
  • 12–3 PM89%(160 flights)
  • 3–6 PM60%(30 flights)
  • 6–9 PM95%(85 flights)
  • 9 PM–12 AM97%(85 flights)
On-time trend by month
97%
May

Jul 52% → May 97% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
July 202552%44
August 202592%37
September 202593%30
October 202593%30
November 202597%30
December 202597%31
January 202690%31
February 202696%28
March 202697%31
April 202697%30
May 202697%31
Departures on time
88%
Diverted
0.3%
Flights flown
360
Months covered
12

Keep nerding

Based on 361 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.