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Flight Reliability

DL 4174 · Delta Air Lines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and DL 4174 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

90%
Arrive within 15 minutes
0 min
Average arrival delay
0.8%
Cancelled
11 min early
Median arrival delay

Based on 127 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon95%(20 flights)
  • Tue95%(20 flights)
  • Wed90%(20 flights)
  • Thu95%(19 flights)
  • Fri90%(19 flights)
  • Sat69%(13 flights)
  • Sun87%(15 flights)
On-time by departure window
  • 6–9 AM97%(37 flights)
  • 9 AM–12 PM88%(16 flights)
  • 12–3 PM87%(52 flights)
  • 3–6 PM86%(21 flights)
On-time trend by month
89%
May

Aug 81% → May 89% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
August 202581%16
September 2025100%33
January 202677%26
April 202694%18
May 202689%27
Departures on time
88%
Diverted
0%
Flights flown
126
Months covered
7

Keep nerding

Based on 127 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.