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Flight Reliability

UA 1583 · United Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and UA 1583 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
16 min
Average arrival delay
0.8%
Cancelled
0 min
Median arrival delay

Based on 590 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon65%(83 flights)
  • Tue72%(81 flights)
  • Wed72%(85 flights)
  • Thu77%(83 flights)
  • Fri80%(83 flights)
  • Sat68%(79 flights)
  • Sun67%(88 flights)
On-time by departure window
  • 6–9 AM87%(37 flights)
  • 9 AM–12 PM84%(215 flights)
  • 3–6 PM—(2 flights)
  • 6–9 PM62%(328 flights)
On-time trend by month
83%
May

Jun 43% → May 83% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202543%30
July 202548%29
August 202553%30
September 202577%30
October 202576%37
November 202572%58
December 202587%46
January 202674%86
February 202677%60
March 202664%59
April 202674%58
May 202683%59
Departures on time
76%
Diverted
0.5%
Flights flown
582
Months covered
12

Keep nerding

Based on 590 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.