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Flight Reliability

DL 4338 · Delta Air Lines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and DL 4338 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

84%
Arrive within 15 minutes
6 min
Average arrival delay
14.3%
Cancelled
13 min early
Median arrival delay

Based on 672 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon86%(86 flights)
  • Tue88%(64 flights)
  • Wed82%(65 flights)
  • Thu78%(92 flights)
  • Fri90%(86 flights)
  • Sat83%(94 flights)
  • Sun83%(86 flights)
On-time by departure window
  • 6–9 AM92%(144 flights)
  • 9 AM–12 PM93%(145 flights)
  • 12–3 PM75%(284 flights)
On-time trend by month
90%
May

Jun 92% → May 90% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202592%60
July 202597%61
August 202594%62
September 202592%60
October 202589%46
November 202596%44
December 202567%36
January 202675%44
February 202660%45
March 202666%47
April 202661%18
May 202690%50
Departures on time
83%
Diverted
0.4%
Flights flown
573
Months covered
12

Keep nerding

Based on 672 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.