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Flight Reliability

UA 4225 · United Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and UA 4225 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

76%
Arrive within 15 minutes
16 min
Average arrival delay
1.5%
Cancelled
8 min early
Median arrival delay

Based on 331 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon69%(51 flights)
  • Tue84%(37 flights)
  • Wed75%(44 flights)
  • Thu80%(51 flights)
  • Fri82%(51 flights)
  • Sat76%(45 flights)
  • Sun68%(47 flights)
On-time by departure window
  • 3–6 AM56%(18 flights)
  • 6–9 AM86%(55 flights)
  • 9 AM–12 PM82%(142 flights)
  • 3–6 PM69%(35 flights)
  • 6–9 PM67%(76 flights)
On-time trend by month
77%
May

Jun 48% → May 77% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202548%29
July 202576%29
August 202582%27
September 202582%17
October 202588%25
November 202586%29
December 202563%24
January 202662%29
February 202689%26
March 202687%31
April 202677%30
May 202677%30
Departures on time
76%
Diverted
0%
Flights flown
326
Months covered
12

Keep nerding

Based on 331 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.