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Flight Reliability

DL 4097 · Delta Air Lines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and DL 4097 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
14 min
Average arrival delay
1.9%
Cancelled
7 min early
Median arrival delay

Based on 423 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon67%(61 flights)
  • Tue68%(60 flights)
  • Wed83%(60 flights)
  • Thu82%(60 flights)
  • Fri94%(62 flights)
  • Sat81%(58 flights)
  • Sun80%(54 flights)
On-time by departure window
  • 9 AM–12 PM74%(218 flights)
  • 12–3 PM80%(81 flights)
  • 3–6 PM86%(98 flights)
  • 6–9 PM100%(18 flights)
On-time trend by month
82%
May

Jun 86% → May 82% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202586%14
August 202583%40
September 202592%60
October 2025100%10
January 202649%49
February 202682%55
March 202673%60
April 202687%60
May 202682%62
Departures on time
79%
Diverted
0%
Flights flown
415
Months covered
10

Keep nerding

Based on 423 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.