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Flight Reliability

DL 4827 · Delta Air Lines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and DL 4827 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
12 min
Average arrival delay
0.9%
Cancelled
9 min early
Median arrival delay

Based on 220 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon81%(31 flights)
  • Tue91%(33 flights)
  • Wed89%(36 flights)
  • Thu83%(35 flights)
  • Fri69%(32 flights)
  • Sat94%(18 flights)
  • Sun75%(32 flights)
On-time by departure window
  • 6–9 AM89%(97 flights)
  • 9 AM–12 PM90%(19 flights)
  • 12–3 PM79%(89 flights)
  • 3–6 PM50%(12 flights)
On-time trend by month
83%
Apr

Jun 65% → Apr 83% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202565%17
August 2025100%23
September 202588%17
November 202578%36
December 202572%43
February 202685%26
March 202694%34
April 202683%12
Departures on time
81%
Diverted
0.5%
Flights flown
217
Months covered
11

Keep nerding

Based on 220 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.