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Flight Reliability

UA 1859 · United Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and UA 1859 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

80%
Arrive within 15 minutes
7 min
Average arrival delay
1.2%
Cancelled
4 min early
Median arrival delay

Based on 508 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon82%(73 flights)
  • Tue90%(72 flights)
  • Wed81%(72 flights)
  • Thu80%(70 flights)
  • Fri68%(72 flights)
  • Sat84%(67 flights)
  • Sun76%(74 flights)
On-time by departure window
  • 6–9 AM91%(109 flights)
  • 9 AM–12 PM84%(61 flights)
  • 12–3 PM82%(238 flights)
  • 3–6 PM59%(92 flights)
On-time trend by month
91%
May

Jun 75% → May 91% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202575%47
July 202555%31
August 202572%29
September 2025100%30
October 202576%37
November 202567%55
December 202572%47
January 202686%28
February 202686%44
March 202682%34
April 202692%60
May 202691%58
Departures on time
85%
Diverted
0.4%
Flights flown
500
Months covered
12

Keep nerding

Based on 508 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.