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Flight Reliability

UA 4571 · United Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and UA 4571 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

72%
Arrive within 15 minutes
21 min
Average arrival delay
3.0%
Cancelled
6 min early
Median arrival delay

Based on 265 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon71%(42 flights)
  • Tue78%(37 flights)
  • Wed71%(35 flights)
  • Thu66%(38 flights)
  • Fri82%(38 flights)
  • Sat71%(28 flights)
  • Sun67%(39 flights)
On-time by departure window
  • 6–9 AM89%(27 flights)
  • 9 AM–12 PM83%(24 flights)
  • 12–3 PM82%(11 flights)
  • 3–6 PM—(3 flights)
  • 6–9 PM66%(159 flights)
  • 9 PM–12 AM76%(33 flights)
On-time trend by month
71%
May

Jun 57% → May 71% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202557%28
July 202558%26
August 202567%27
September 202581%26
October 202567%27
November 202583%30
December 202567%15
January 202682%11
February 202674%19
March 202695%19
May 202671%24
Departures on time
75%
Diverted
0%
Flights flown
257
Months covered
12

Keep nerding

Based on 265 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.