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Flight Reliability

UA 4254 · United Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and UA 4254 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
8 min
Average arrival delay
2.0%
Cancelled
10 min early
Median arrival delay

Based on 294 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon88%(42 flights)
  • Tue77%(35 flights)
  • Wed76%(42 flights)
  • Thu83%(40 flights)
  • Fri83%(42 flights)
  • Sat72%(36 flights)
  • Sun78%(51 flights)
On-time by departure window
  • 9 AM–12 PM83%(53 flights)
  • 12–3 PM75%(68 flights)
  • 3–6 PM88%(56 flights)
  • 6–9 PM78%(111 flights)
On-time trend by month
86%
May

Jun 53% → May 86% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202553%19
August 202563%16
September 202570%30
October 202590%31
November 202580%30
December 202593%28
January 202674%27
February 202692%25
March 202686%28
April 202679%29
May 202686%22
Departures on time
81%
Diverted
0%
Flights flown
288
Months covered
12

Keep nerding

Based on 294 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.