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Flight Reliability

UA 2151 · United Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and UA 2151 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

92%
Arrive within 15 minutes
8 min early
Average arrival delay
2.9%
Cancelled
14 min early
Median arrival delay

Based on 415 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon91%(58 flights)
  • Tue91%(57 flights)
  • Wed97%(57 flights)
  • Thu95%(59 flights)
  • Fri97%(58 flights)
  • Sat85%(59 flights)
  • Sun86%(55 flights)
On-time by departure window
  • 6–9 AM93%(287 flights)
  • 9 AM–12 PM91%(91 flights)
  • 3–6 PM76%(25 flights)
On-time trend by month
94%
May

Jun 83% → May 94% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202583%35
July 202595%56
August 202589%45
September 202590%30
October 2025100%31
November 202590%29
December 202577%31
January 202693%29
February 202696%24
March 202694%31
April 2026100%31
May 202694%31
Departures on time
93%
Diverted
0%
Flights flown
403
Months covered
12

Keep nerding

Based on 415 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.