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Flight Reliability

DL 4630 · Delta Air Lines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and DL 4630 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

77%
Arrive within 15 minutes
12 min
Average arrival delay
3.0%
Cancelled
8 min early
Median arrival delay

Based on 405 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon65%(66 flights)
  • Tue78%(60 flights)
  • Wed92%(64 flights)
  • Thu81%(63 flights)
  • Fri78%(63 flights)
  • Sat71%(14 flights)
  • Sun71%(62 flights)
On-time by departure window
  • 6–9 AM88%(83 flights)
  • 9 AM–12 PM77%(13 flights)
  • 12–3 PM78%(171 flights)
  • 3–6 PM67%(72 flights)
  • 6–9 PM74%(53 flights)
On-time trend by month
60%
May

Jun 95% → May 60% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202595%20
July 202589%26
August 202582%27
September 202590%10
October 202576%38
November 202564%33
December 202574%43
January 202678%51
February 202682%50
March 202669%54
April 202690%20
May 202660%20
Departures on time
77%
Diverted
0.2%
Flights flown
392
Months covered
12

Keep nerding

Based on 405 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.