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Flight Reliability

UA 2859 · United Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and UA 2859 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

70%
Arrive within 15 minutes
21 min
Average arrival delay
0.2%
Cancelled
1 min
Median arrival delay

Based on 466 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon79%(67 flights)
  • Tue72%(67 flights)
  • Wed72%(68 flights)
  • Thu62%(66 flights)
  • Fri64%(67 flights)
  • Sat77%(62 flights)
  • Sun64%(66 flights)
On-time by departure window
  • 9 AM–12 PM81%(16 flights)
  • 12–3 PM59%(63 flights)
  • 3–6 PM81%(21 flights)
  • 6–9 PM71%(363 flights)
On-time trend by month
68%
May

Jun 59% → May 68% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202559%34
July 202549%57
August 202556%48
September 202570%30
October 202577%31
November 202583%29
December 202571%63
January 202687%31
February 202677%44
March 202674%35
April 202690%30
May 202668%31
Departures on time
71%
Diverted
0.4%
Flights flown
463
Months covered
12

Keep nerding

Based on 466 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.