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Flight Reliability

UA 1578 · United Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and UA 1578 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

80%
Arrive within 15 minutes
10 min
Average arrival delay
1.8%
Cancelled
5 min early
Median arrival delay

Based on 507 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon85%(75 flights)
  • Tue82%(65 flights)
  • Wed78%(60 flights)
  • Thu72%(76 flights)
  • Fri80%(76 flights)
  • Sat81%(67 flights)
  • Sun80%(76 flights)
On-time by departure window
  • 6–9 AM85%(137 flights)
  • 9 AM–12 PM83%(217 flights)
  • 12–3 PM—(3 flights)
  • 3–6 PM71%(138 flights)
On-time trend by month
84%
May

Jun 60% → May 84% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202560%30
July 202550%28
August 202583%30
September 202570%30
October 202592%36
November 202587%60
December 202588%32
January 202683%54
February 202684%51
March 202687%52
April 202670%47
May 202684%45
Departures on time
82%
Diverted
0.6%
Flights flown
495
Months covered
12

Keep nerding

Based on 507 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.