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Flight Reliability

UA 431 · United Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and UA 431 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

77%
Arrive within 15 minutes
11 min
Average arrival delay
0%
Cancelled
6 min early
Median arrival delay

Based on 563 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon76%(80 flights)
  • Tue73%(80 flights)
  • Wed84%(80 flights)
  • Thu80%(80 flights)
  • Fri75%(80 flights)
  • Sat80%(81 flights)
  • Sun74%(80 flights)
On-time by departure window
  • 6–9 AM78%(18 flights)
  • 12–3 PM90%(195 flights)
  • 3–6 PM46%(35 flights)
  • 6–9 PM73%(278 flights)
  • 9 PM–12 AM74%(35 flights)
On-time trend by month
67%
May

Jun 39% → May 67% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202539%59
July 202580%61
August 202570%43
September 202583%60
October 202592%62
November 202593%59
December 202569%32
January 202690%31
February 202682%28
March 202682%55
April 202683%29
May 202667%42
Departures on time
77%
Diverted
0.4%
Flights flown
561
Months covered
12

Keep nerding

Based on 563 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.