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Flight Reliability

UA 1584 · United Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and UA 1584 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

87%
Arrive within 15 minutes
1 min early
Average arrival delay
0.2%
Cancelled
10 min early
Median arrival delay

Based on 459 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon94%(68 flights)
  • Tue87%(63 flights)
  • Wed85%(67 flights)
  • Thu92%(64 flights)
  • Fri78%(64 flights)
  • Sat86%(62 flights)
  • Sun88%(69 flights)
On-time by departure window
  • 3–6 AM72%(18 flights)
  • 6–9 AM87%(178 flights)
  • 9 AM–12 PM89%(218 flights)
  • 3–6 PM92%(25 flights)
  • 9 PM–12 AM83%(18 flights)
On-time trend by month
84%
May

Jun 90% → May 84% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202590%73
July 202590%31
August 202590%30
September 202593%30
October 202587%31
November 202593%30
December 202575%44
January 202686%36
February 202686%28
March 202697%34
April 202681%59
May 202684%31
Departures on time
91%
Diverted
0.2%
Flights flown
457
Months covered
12

Keep nerding

Based on 459 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.