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Flight Reliability

UA 401 · United Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and UA 401 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
2 min early
Average arrival delay
0.5%
Cancelled
8 min early
Median arrival delay

Based on 220 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon84%(31 flights)
  • Tue94%(31 flights)
  • Wed81%(31 flights)
  • Thu88%(32 flights)
  • Fri90%(31 flights)
  • Sat91%(32 flights)
  • Sun97%(31 flights)
On-time by departure window
  • 6–9 AM97%(63 flights)
  • 9 AM–12 PM86%(156 flights)
On-time trend by month
93%
Feb

Aug 88% → Feb 93% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
August 202588%25
September 202587%37
October 202583%54
November 202593%29
December 2025100%17
January 202689%26
February 202693%28
Departures on time
90%
Diverted
0%
Flights flown
219
Months covered
8

Keep nerding

Based on 220 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.