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Flight Reliability

DL 4633 · Delta Air Lines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and DL 4633 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

79%
Arrive within 15 minutes
4 min
Average arrival delay
2.5%
Cancelled
10 min early
Median arrival delay

Based on 243 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon82%(33 flights)
  • Tue68%(31 flights)
  • Wed85%(34 flights)
  • Thu91%(32 flights)
  • Fri68%(31 flights)
  • Sat80%(40 flights)
  • Sun76%(33 flights)
On-time by departure window
  • 6–9 AM82%(67 flights)
  • 9 AM–12 PM82%(107 flights)
  • 3–6 PM75%(36 flights)
  • 6–9 PM58%(24 flights)
On-time trend by month
67%
May

Oct 82% → May 67% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
October 202582%51
November 202590%48
December 202581%37
January 202678%27
February 202664%11
May 202667%49
Departures on time
81%
Diverted
1.2%
Flights flown
234
Months covered
9

Keep nerding

Based on 243 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.