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Flight Reliability

UA 2856 · United Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and UA 2856 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

76%
Arrive within 15 minutes
16 min
Average arrival delay
2.9%
Cancelled
5 min early
Median arrival delay

Based on 410 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon77%(56 flights)
  • Tue80%(59 flights)
  • Wed81%(57 flights)
  • Thu75%(55 flights)
  • Fri70%(56 flights)
  • Sat75%(57 flights)
  • Sun75%(56 flights)
On-time by departure window
  • 6–9 AM96%(24 flights)
  • 9 AM–12 PM93%(14 flights)
  • 12–3 PM70%(20 flights)
  • 3–6 PM71%(35 flights)
  • 6–9 PM75%(303 flights)
On-time trend by month
81%
May

Jun 76% → May 81% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202576%53
July 202562%29
August 202584%31
September 202580%30
October 202574%31
November 202571%28
December 202580%30
January 202657%28
February 202681%42
March 202670%33
April 202693%30
May 202681%31
Departures on time
76%
Diverted
0.5%
Flights flown
396
Months covered
12

Keep nerding

Based on 410 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.