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Flight Reliability

DL 4308 · Delta Air Lines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and DL 4308 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

93%
Arrive within 15 minutes
9 min early
Average arrival delay
0.7%
Cancelled
13 min early
Median arrival delay

Based on 566 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon92%(78 flights)
  • Tue88%(76 flights)
  • Wed96%(76 flights)
  • Thu96%(98 flights)
  • Fri93%(102 flights)
  • Sat93%(28 flights)
  • Sun92%(104 flights)
On-time by departure window
  • 9 AM–12 PM93%(560 flights)
  • 12–3 PM—(2 flights)
On-time trend by month
96%
May

Jun 85% → May 96% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202585%26
July 202586%28
August 202596%28
September 202590%50
October 202594%54
November 202596%46
December 2025100%58
January 202688%60
February 202691%56
March 202694%54
April 202694%52
May 202696%50
Departures on time
95%
Diverted
0%
Flights flown
562
Months covered
12

Keep nerding

Based on 566 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.