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Flight Reliability

UA 2866 · United Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and UA 2866 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

78%
Arrive within 15 minutes
11 min
Average arrival delay
1.0%
Cancelled
5 min early
Median arrival delay

Based on 421 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon69%(61 flights)
  • Tue84%(49 flights)
  • Wed81%(67 flights)
  • Thu77%(64 flights)
  • Fri87%(60 flights)
  • Sat85%(52 flights)
  • Sun70%(64 flights)
On-time by departure window
  • 6–9 AM—(1 flights)
  • 9 AM–12 PM86%(14 flights)
  • 3–6 PM78%(183 flights)
  • 6–9 PM65%(72 flights)
  • 9 PM–12 AM84%(147 flights)
On-time trend by month
78%
May

Jun 57% → May 78% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202557%21
July 202568%19
August 202573%30
September 202593%30
October 202584%31
November 202567%30
December 202582%61
January 202686%28
February 202692%25
March 202682%33
April 202673%55
May 202678%54
Departures on time
76%
Diverted
0%
Flights flown
417
Months covered
12

Keep nerding

Based on 421 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.