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Flight Reliability

UA 1579 · United Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and UA 1579 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

69%
Arrive within 15 minutes
24 min
Average arrival delay
3.3%
Cancelled
4 min early
Median arrival delay

Based on 454 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon58%(66 flights)
  • Tue62%(68 flights)
  • Wed74%(66 flights)
  • Thu71%(62 flights)
  • Fri75%(65 flights)
  • Sat89%(45 flights)
  • Sun59%(66 flights)
On-time by departure window
  • 6–9 AM100%(30 flights)
  • 9 AM–12 PM100%(18 flights)
  • 12–3 PM74%(275 flights)
  • 3–6 PM41%(22 flights)
  • 6–9 PM41%(87 flights)
  • 9 PM–12 AM—(6 flights)
On-time trend by month
84%
May

Jun 51% → May 84% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202551%51
July 202538%21
August 202552%27
September 202583%35
October 202580%59
November 202564%52
December 202570%30
January 202670%30
February 202673%26
March 202661%31
April 202684%31
May 202684%45
Departures on time
70%
Diverted
0.2%
Flights flown
438
Months covered
12

Keep nerding

Based on 454 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.