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Flight Reliability

UA 4590 · United Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and UA 4590 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

66%
Arrive within 15 minutes
27 min
Average arrival delay
3.6%
Cancelled
2 min early
Median arrival delay

Based on 253 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon64%(33 flights)
  • Tue61%(33 flights)
  • Wed68%(34 flights)
  • Thu67%(39 flights)
  • Fri77%(35 flights)
  • Sat65%(34 flights)
  • Sun61%(36 flights)
On-time by departure window
  • 9 AM–12 PM69%(32 flights)
  • 3–6 PM68%(126 flights)
  • 6–9 PM60%(79 flights)
  • 9 PM–12 AM—(7 flights)
On-time trend by month
45%
May

Jul 69% → May 45% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
July 202569%29
August 202574%27
September 202579%29
October 202572%29
November 202548%27
December 202544%16
February 202686%14
March 202661%18
April 202670%27
May 202645%20
Departures on time
66%
Diverted
0%
Flights flown
244
Months covered
11

Keep nerding

Based on 253 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.