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Flight Reliability

UA 1128 · United Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and UA 1128 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

78%
Arrive within 15 minutes
6 min
Average arrival delay
2.6%
Cancelled
8 min early
Median arrival delay

Based on 429 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon82%(60 flights)
  • Tue87%(62 flights)
  • Wed79%(62 flights)
  • Thu75%(57 flights)
  • Fri75%(59 flights)
  • Sat84%(63 flights)
  • Sun64%(55 flights)
On-time by departure window
  • 6–9 AM85%(46 flights)
  • 9 AM–12 PM94%(48 flights)
  • 12–3 PM77%(66 flights)
  • 3–6 PM74%(54 flights)
  • 6–9 PM75%(202 flights)
  • 9 PM–12 AM—(2 flights)
On-time trend by month
79%
May

Jun 84% → May 79% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202584%50
July 202593%30
August 202581%31
September 202569%29
October 202568%31
November 202576%29
December 202579%29
January 202675%55
February 202676%37
March 202677%30
April 202682%34
May 202679%33
Departures on time
78%
Diverted
0%
Flights flown
418
Months covered
12

Keep nerding

Based on 429 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.