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Flight Reliability

UA 5101 · United Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and UA 5101 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

73%
Arrive within 15 minutes
21 min
Average arrival delay
2.2%
Cancelled
4 min early
Median arrival delay

Based on 411 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon71%(63 flights)
  • Tue75%(48 flights)
  • Wed70%(50 flights)
  • Thu74%(58 flights)
  • Fri69%(62 flights)
  • Sat76%(54 flights)
  • Sun74%(61 flights)
On-time by departure window
  • 9 AM–12 PM—(1 flights)
  • 3–6 PM78%(94 flights)
  • 6–9 PM57%(164 flights)
  • 9 PM–12 AM88%(137 flights)
On-time trend by month
61%
May

Jun 68% → May 61% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202568%28
July 202532%28
August 202552%46
September 202575%28
October 202587%31
November 202597%29
December 202573%52
January 202682%34
February 202689%28
March 202687%31
April 202688%17
May 202661%44
Departures on time
74%
Diverted
1.5%
Flights flown
396
Months covered
12

Keep nerding

Based on 411 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.