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Flight Reliability

UA 4731 · United Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and UA 4731 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

79%
Arrive within 15 minutes
9 min
Average arrival delay
1.4%
Cancelled
8 min early
Median arrival delay

Based on 355 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon83%(52 flights)
  • Tue77%(48 flights)
  • Wed77%(48 flights)
  • Thu79%(52 flights)
  • Fri82%(50 flights)
  • Sat81%(48 flights)
  • Sun71%(52 flights)
On-time by departure window
  • 6–9 AM89%(256 flights)
  • 9 AM–12 PM53%(49 flights)
  • 12–3 PM—(4 flights)
  • 3–6 PM49%(41 flights)
On-time trend by month
61%
May

Jun 60% → May 61% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202560%30
July 202581%31
August 202597%31
September 202597%30
October 202577%31
November 202583%18
December 202565%31
January 202690%31
February 202696%28
March 202677%30
April 202661%28
May 202661%31
Departures on time
82%
Diverted
0%
Flights flown
350
Months covered
12

Keep nerding

Based on 355 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.