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Flight Reliability

UA 1131 · United Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and UA 1131 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

84%
Arrive within 15 minutes
0 min
Average arrival delay
1.2%
Cancelled
9 min early
Median arrival delay

Based on 422 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon90%(61 flights)
  • Tue81%(62 flights)
  • Wed93%(58 flights)
  • Thu82%(60 flights)
  • Fri76%(58 flights)
  • Sat81%(57 flights)
  • Sun84%(61 flights)
On-time by departure window
  • 12–3 AM—(1 flights)
  • 3–6 AM86%(36 flights)
  • 6–9 AM95%(96 flights)
  • 9 AM–12 PM87%(79 flights)
  • 12–3 PM68%(40 flights)
  • 3–6 PM50%(24 flights)
  • 6–9 PM84%(141 flights)
On-time trend by month
81%
May

Jun 95% → May 81% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202595%60
July 202582%62
August 202590%48
September 202577%30
October 202585%26
December 202576%42
January 202686%29
February 202686%28
March 202665%31
April 202690%30
May 202681%31
Departures on time
87%
Diverted
0%
Flights flown
417
Months covered
11

Keep nerding

Based on 422 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.