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Flight Reliability

UA 3587 · United Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and UA 3587 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
3 min
Average arrival delay
6.2%
Cancelled
9 min early
Median arrival delay

Based on 354 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon75%(47 flights)
  • Tue75%(47 flights)
  • Wed78%(50 flights)
  • Thu82%(49 flights)
  • Fri84%(51 flights)
  • Sat88%(41 flights)
  • Sun77%(47 flights)
On-time by departure window
  • 6–9 AM78%(51 flights)
  • 9 AM–12 PM85%(40 flights)
  • 3–6 PM87%(69 flights)
  • 6–9 PM76%(172 flights)
On-time trend by month
93%
May

Jun 85% → May 93% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202585%26
July 202576%29
August 202583%30
September 202564%25
October 202563%30
November 202571%24
December 202568%28
January 202682%28
February 202692%24
March 202686%28
April 202690%30
May 202693%30
Departures on time
81%
Diverted
0%
Flights flown
332
Months covered
12

Keep nerding

Based on 354 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.