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Flight Reliability

UA 4248 · United Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and UA 4248 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

89%
Arrive within 15 minutes
3 min early
Average arrival delay
0.9%
Cancelled
13 min early
Median arrival delay

Based on 345 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon90%(51 flights)
  • Tue87%(46 flights)
  • Wed88%(50 flights)
  • Thu90%(52 flights)
  • Fri92%(51 flights)
  • Sat88%(40 flights)
  • Sun90%(51 flights)
On-time by departure window
  • 3–6 AM93%(121 flights)
  • 6–9 AM91%(32 flights)
  • 9 AM–12 PM89%(131 flights)
  • 12–3 PM83%(48 flights)
  • 3–6 PM—(9 flights)
On-time trend by month
79%
May

Jun 90% → May 79% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202590%29
July 202587%31
August 202594%31
September 202596%27
October 202590%31
November 2025100%25
December 202587%30
January 202688%24
February 202696%25
March 202680%30
April 202690%30
May 202679%28
Departures on time
91%
Diverted
0.3%
Flights flown
341
Months covered
12

Keep nerding

Based on 345 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.