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Flight Reliability

UA 5115 · United Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and UA 5115 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

85%
Arrive within 15 minutes
5 min
Average arrival delay
0.7%
Cancelled
8 min early
Median arrival delay

Based on 414 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon83%(64 flights)
  • Tue90%(48 flights)
  • Wed91%(64 flights)
  • Thu79%(62 flights)
  • Fri86%(62 flights)
  • Sat84%(44 flights)
  • Sun86%(64 flights)
On-time by departure window
  • 3–6 AM87%(31 flights)
  • 6–9 AM85%(251 flights)
  • 9 AM–12 PM87%(126 flights)
On-time trend by month
93%
May

Jun 82% → May 93% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202582%28
July 202590%31
August 202584%32
September 202590%30
October 202591%34
November 202595%42
December 202571%38
January 202679%29
February 202674%27
March 202684%31
April 202686%58
May 202693%28
Departures on time
88%
Diverted
0.7%
Flights flown
408
Months covered
12

Keep nerding

Based on 414 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.