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Flight Reliability

UA 4582 · United Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and UA 4582 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

66%
Arrive within 15 minutes
36 min
Average arrival delay
1.9%
Cancelled
2 min
Median arrival delay

Based on 317 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon69%(48 flights)
  • Tue69%(39 flights)
  • Wed68%(40 flights)
  • Thu62%(45 flights)
  • Fri68%(47 flights)
  • Sat63%(43 flights)
  • Sun63%(49 flights)
On-time by departure window
  • 9 AM–12 PM50%(16 flights)
  • 12–3 PM71%(203 flights)
  • 3–6 PM56%(91 flights)
  • 6–9 PM—(1 flights)
On-time trend by month
74%
May

Jun 80% → May 74% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202580%20
July 202541%29
August 202557%30
September 202567%30
October 202568%31
November 202554%28
December 202561%31
January 202660%20
February 202679%24
April 202683%30
May 202674%31
Departures on time
69%
Diverted
0%
Flights flown
311
Months covered
12

Keep nerding

Based on 317 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.