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Flight Reliability

UA 4545 · United Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and UA 4545 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

76%
Arrive within 15 minutes
20 min
Average arrival delay
2.1%
Cancelled
11 min early
Median arrival delay

Based on 281 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon64%(36 flights)
  • Tue79%(33 flights)
  • Wed80%(40 flights)
  • Thu71%(44 flights)
  • Fri80%(45 flights)
  • Sat82%(34 flights)
  • Sun79%(42 flights)
On-time by departure window
  • 6–9 AM63%(16 flights)
  • 9 AM–12 PM78%(167 flights)
  • 12–3 PM—(1 flights)
  • 3–6 PM74%(49 flights)
  • 6–9 PM82%(17 flights)
  • 9 PM–12 AM75%(24 flights)
On-time trend by month
65%
May

Jun 100% → May 65% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 2025100%30
July 202581%31
August 202588%17
October 202572%29
November 202575%20
December 202563%30
January 202671%28
February 202680%20
March 202668%19
April 202673%26
May 202665%17
Departures on time
76%
Diverted
0.4%
Flights flown
274
Months covered
12

Keep nerding

Based on 281 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.