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Flight Reliability

DL 4172 · Delta Air Lines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and DL 4172 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

87%
Arrive within 15 minutes
8 min
Average arrival delay
2.1%
Cancelled
11 min early
Median arrival delay

Based on 467 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon91%(67 flights)
  • Tue79%(67 flights)
  • Wed80%(69 flights)
  • Thu91%(68 flights)
  • Fri87%(68 flights)
  • Sat89%(53 flights)
  • Sun92%(65 flights)
On-time by departure window
  • 6–9 AM89%(56 flights)
  • 9 AM–12 PM87%(173 flights)
  • 12–3 PM86%(228 flights)
On-time trend by month
94%
Apr

Jun 80% → Apr 94% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202580%50
July 202590%62
August 202581%62
September 202587%54
October 202590%60
November 202593%54
December 202584%38
January 202696%22
February 202685%27
April 202694%16
Departures on time
85%
Diverted
0%
Flights flown
457
Months covered
12

Keep nerding

Based on 467 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.