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Flight Reliability

DL 4812 · Delta Air Lines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and DL 4812 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

75%
Arrive within 15 minutes
14 min
Average arrival delay
1.0%
Cancelled
10 min early
Median arrival delay

Based on 200 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon76%(33 flights)
  • Tue74%(31 flights)
  • Wed77%(31 flights)
  • Thu83%(30 flights)
  • Fri72%(29 flights)
  • Sat80%(10 flights)
  • Sun67%(33 flights)
On-time by departure window
  • 9 AM–12 PM—(6 flights)
  • 12–3 PM—(3 flights)
  • 3–6 PM74%(152 flights)
  • 6–9 PM72%(36 flights)
On-time trend by month
82%
Apr

Jun 79% → Apr 82% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202579%24
July 202565%23
August 202582%28
September 2025100%20
October 202581%26
November 202575%24
December 202538%16
March 202667%24
April 202682%11
Departures on time
74%
Diverted
0.5%
Flights flown
197
Months covered
10

Keep nerding

Based on 200 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.