Skip to content
WanderNerd
Check a flight

Flight Reliability

UA 231 · United Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and UA 231 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

86%
Arrive within 15 minutes
0 min
Average arrival delay
2.3%
Cancelled
9 min early
Median arrival delay

Based on 387 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon86%(55 flights)
  • Tue87%(52 flights)
  • Wed95%(55 flights)
  • Thu82%(56 flights)
  • Fri93%(56 flights)
  • Sat86%(49 flights)
  • Sun76%(54 flights)
On-time by departure window
  • 6–9 AM89%(129 flights)
  • 9 AM–12 PM95%(37 flights)
  • 12–3 PM89%(37 flights)
  • 3–6 PM82%(138 flights)
  • 6–9 PM74%(19 flights)
  • 9 PM–12 AM88%(17 flights)
On-time trend by month
93%
Apr

Jun 76% → Apr 93% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202576%29
July 202586%29
August 202581%43
September 202587%54
October 202590%31
November 202586%29
December 202584%31
January 202679%43
February 202693%29
March 202697%30
April 202693%29
Departures on time
85%
Diverted
0.3%
Flights flown
377
Months covered
11

Keep nerding

Based on 387 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.