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Flight Reliability

UA 4173 · United Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and UA 4173 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

68%
Arrive within 15 minutes
31 min
Average arrival delay
2.4%
Cancelled
4 min early
Median arrival delay

Based on 340 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon60%(47 flights)
  • Tue64%(47 flights)
  • Wed79%(48 flights)
  • Thu72%(47 flights)
  • Fri67%(49 flights)
  • Sat68%(47 flights)
  • Sun64%(47 flights)
On-time by departure window
  • 6–9 AM92%(39 flights)
  • 9 AM–12 PM83%(18 flights)
  • 12–3 PM64%(214 flights)
  • 3–6 PM62%(60 flights)
  • 6–9 PM—(1 flights)
On-time trend by month
58%
May

Jun 73% → May 58% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202573%30
July 202545%29
August 202571%28
October 202584%31
November 202559%29
December 202548%31
January 202686%28
February 202679%28
March 202672%29
April 202666%29
May 202658%31
Departures on time
72%
Diverted
0%
Flights flown
332
Months covered
12

Keep nerding

Based on 340 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.