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Flight Reliability

UA 4787 · United Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and UA 4787 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
11 min
Average arrival delay
0.6%
Cancelled
7 min early
Median arrival delay

Based on 360 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon77%(52 flights)
  • Tue86%(51 flights)
  • Wed88%(48 flights)
  • Thu77%(51 flights)
  • Fri80%(51 flights)
  • Sat78%(51 flights)
  • Sun71%(52 flights)
On-time by departure window
  • 6–9 AM78%(72 flights)
  • 9 AM–12 PM—(1 flights)
  • 12–3 PM81%(272 flights)
  • 6–9 PM46%(11 flights)
On-time trend by month
60%
May

Jun 73% → May 60% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202573%26
July 202579%29
August 202583%30
September 202583%30
October 202577%31
November 202579%29
December 202571%31
January 202684%31
February 202682%28
March 202690%31
April 202690%30
May 202660%30
Departures on time
80%
Diverted
0.6%
Flights flown
356
Months covered
12

Keep nerding

Based on 360 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.