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Flight Reliability

DL 4170 · Delta Air Lines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and DL 4170 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

89%
Arrive within 15 minutes
4 min early
Average arrival delay
2.3%
Cancelled
10 min early
Median arrival delay

Based on 171 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon84%(25 flights)
  • Tue88%(25 flights)
  • Wed84%(25 flights)
  • Thu100%(23 flights)
  • Fri96%(22 flights)
  • Sat91%(23 flights)
  • Sun83%(23 flights)
On-time by departure window
  • 6–9 AM85%(58 flights)
  • 9 AM–12 PM100%(24 flights)
  • 12–3 PM100%(24 flights)
  • 3–6 PM85%(60 flights)
On-time trend by month
100%
May

Aug 83% → May 100% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
August 202583%12
September 202590%19
October 202582%27
January 202692%24
February 202682%28
April 2026100%36
May 2026100%12
Departures on time
91%
Diverted
0.6%
Flights flown
166
Months covered
9

Keep nerding

Based on 171 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.