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Flight Reliability

DL 3850 · Delta Air Lines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and DL 3850 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

76%
Arrive within 15 minutes
22 min
Average arrival delay
1.6%
Cancelled
1 min early
Median arrival delay

Based on 368 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon74%(50 flights)
  • Tue73%(51 flights)
  • Wed70%(50 flights)
  • Thu78%(50 flights)
  • Fri76%(50 flights)
  • Sat93%(58 flights)
  • Sun64%(52 flights)
On-time by departure window
  • 9 AM–12 PM82%(187 flights)
  • 12–3 PM80%(25 flights)
  • 6–9 PM66%(143 flights)
  • 9 PM–12 AM—(6 flights)
On-time trend by month
68%
May

Jun 84% → May 68% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202584%32
July 202589%35
August 202583%36
September 202594%31
October 202590%31
November 202579%24
December 202542%26
January 202663%30
February 202675%28
March 202661%28
April 202669%29
May 202668%31
Departures on time
76%
Diverted
0.3%
Flights flown
361
Months covered
12

Keep nerding

Based on 368 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.