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Flight Reliability

DL 3857 · Delta Air Lines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and DL 3857 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
3 min early
Average arrival delay
0%
Cancelled
11 min early
Median arrival delay

Based on 268 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon92%(38 flights)
  • Tue87%(38 flights)
  • Wed95%(38 flights)
  • Thu90%(39 flights)
  • Fri90%(39 flights)
  • Sat90%(39 flights)
  • Sun87%(37 flights)
On-time by departure window
  • 6–9 AM88%(90 flights)
  • 9 AM–12 PM88%(114 flights)
  • 3–6 PM97%(64 flights)
On-time trend by month
96%
May

Jun 100% → May 96% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 2025100%14
July 202566%50
August 202590%62
September 202598%58
October 2025100%10
April 202694%18
May 202696%56
Departures on time
88%
Diverted
0%
Flights flown
268
Months covered
7

Keep nerding

Based on 268 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.