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Flight Reliability

DL 4150 · Delta Air Lines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and DL 4150 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

82%
Arrive within 15 minutes
9 min
Average arrival delay
0.2%
Cancelled
8 min early
Median arrival delay

Based on 480 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon71%(72 flights)
  • Tue82%(72 flights)
  • Wed91%(70 flights)
  • Thu93%(70 flights)
  • Fri80%(66 flights)
  • Sat80%(60 flights)
  • Sun78%(69 flights)
On-time by departure window
  • 12–3 PM81%(376 flights)
  • 3–6 PM76%(53 flights)
  • 9 PM–12 AM96%(50 flights)
On-time trend by month
96%
May

Jun 78% → May 96% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202578%46
July 202579%58
August 202587%62
September 202588%60
October 202590%60
November 202582%54
December 202552%50
January 202686%14
March 202688%24
April 202693%27
May 202696%24
Departures on time
81%
Diverted
0%
Flights flown
479
Months covered
11

Keep nerding

Based on 480 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.