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Flight Reliability

UA 4381 · United Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and UA 4381 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

70%
Arrive within 15 minutes
33 min
Average arrival delay
2.8%
Cancelled
0 min
Median arrival delay

Based on 362 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon65%(49 flights)
  • Tue73%(51 flights)
  • Wed73%(51 flights)
  • Thu71%(49 flights)
  • Fri65%(51 flights)
  • Sat78%(49 flights)
  • Sun64%(52 flights)
On-time by departure window
  • 9 AM–12 PM68%(25 flights)
  • 12–3 PM71%(264 flights)
  • 3–6 PM59%(39 flights)
  • 6–9 PM75%(24 flights)
On-time trend by month
80%
May

Jun 72% → May 80% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202572%29
July 202569%29
August 202577%31
September 202587%30
October 202574%31
November 202552%27
December 202550%30
January 202657%28
February 202667%27
March 202673%30
April 202673%30
May 202680%30
Departures on time
68%
Diverted
0%
Flights flown
352
Months covered
12

Keep nerding

Based on 362 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.