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Flight Reliability

UA 583 · United Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and UA 583 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

85%
Arrive within 15 minutes
2 min
Average arrival delay
0.2%
Cancelled
9 min early
Median arrival delay

Based on 415 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon78%(69 flights)
  • Tue83%(48 flights)
  • Wed91%(57 flights)
  • Thu89%(64 flights)
  • Fri83%(57 flights)
  • Sat84%(51 flights)
  • Sun86%(64 flights)
On-time by departure window
  • 6–9 AM90%(137 flights)
  • 9 AM–12 PM82%(85 flights)
  • 12–3 PM93%(93 flights)
  • 3–6 PM75%(12 flights)
  • 6–9 PM72%(83 flights)
On-time trend by month
87%
May

Jun 97% → May 87% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202597%30
July 202571%31
August 202587%45
September 202596%45
October 202585%26
November 202588%24
December 202573%15
January 202690%31
February 202685%26
March 202674%54
April 202685%53
May 202687%30
Departures on time
87%
Diverted
1.0%
Flights flown
410
Months covered
12

Keep nerding

Based on 415 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.