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Flight Reliability

UA 4589 · United Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and UA 4589 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

74%
Arrive within 15 minutes
24 min
Average arrival delay
5.6%
Cancelled
3 min early
Median arrival delay

Based on 322 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon74%(38 flights)
  • Tue76%(41 flights)
  • Wed84%(43 flights)
  • Thu72%(46 flights)
  • Fri66%(44 flights)
  • Sat78%(45 flights)
  • Sun72%(47 flights)
On-time by departure window
  • 6–9 AM79%(135 flights)
  • 9 AM–12 PM86%(36 flights)
  • 3–6 PM68%(25 flights)
  • 9 PM–12 AM67%(108 flights)
On-time trend by month
72%
May

Jun 86% → May 72% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202586%49
July 202584%31
August 202582%17
October 202577%31
November 202581%26
December 202561%23
January 202667%24
February 202678%27
March 202657%28
April 202646%13
May 202672%29
Departures on time
79%
Diverted
0%
Flights flown
304
Months covered
12

Keep nerding

Based on 322 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.