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Flight Reliability

DL 3831 · Delta Air Lines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and DL 3831 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

83%
Arrive within 15 minutes
9 min
Average arrival delay
1.1%
Cancelled
9 min early
Median arrival delay

Based on 375 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon84%(56 flights)
  • Tue85%(53 flights)
  • Wed79%(56 flights)
  • Thu86%(56 flights)
  • Fri81%(57 flights)
  • Sat84%(38 flights)
  • Sun82%(55 flights)
On-time by departure window
  • 6–9 AM92%(26 flights)
  • 9 AM–12 PM83%(149 flights)
  • 12–3 PM—(9 flights)
  • 3–6 PM80%(166 flights)
  • 9 PM–12 AM91%(21 flights)
On-time trend by month
90%
May

Jun 72% → May 90% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202572%39
July 202577%34
August 202583%29
September 202589%26
October 2025100%27
November 202588%25
December 202566%29
January 202679%28
February 202689%27
March 202672%29
April 202693%28
May 202690%50
Departures on time
82%
Diverted
0%
Flights flown
371
Months covered
12

Keep nerding

Based on 375 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.