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Flight Reliability

UA 5031 · United Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and UA 5031 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

71%
Arrive within 15 minutes
21 min
Average arrival delay
3.5%
Cancelled
3 min early
Median arrival delay

Based on 488 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon84%(73 flights)
  • Tue59%(49 flights)
  • Wed68%(60 flights)
  • Thu74%(74 flights)
  • Fri63%(72 flights)
  • Sat77%(65 flights)
  • Sun66%(76 flights)
On-time by departure window
  • 12–3 PM60%(47 flights)
  • 3–6 PM79%(217 flights)
  • 6–9 PM62%(190 flights)
  • 9 PM–12 AM87%(15 flights)
On-time trend by month
71%
May

Jun 66% → May 71% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202566%35
July 202562%52
August 202532%31
September 202569%35
October 202582%49
November 2025100%29
December 202563%30
January 202678%49
February 202669%35
March 202688%25
April 202670%47
May 202671%52
Departures on time
74%
Diverted
0.4%
Flights flown
469
Months covered
12

Keep nerding

Based on 488 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.