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Flight Reliability

UA 4189 · United Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and UA 4189 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

53%
Arrive within 15 minutes
42 min
Average arrival delay
5.7%
Cancelled
13 min
Median arrival delay

Based on 351 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon50%(44 flights)
  • Tue50%(50 flights)
  • Wed48%(48 flights)
  • Thu57%(47 flights)
  • Fri64%(47 flights)
  • Sat56%(50 flights)
  • Sun44%(45 flights)
On-time by departure window
  • 6–9 AM60%(20 flights)
  • 9 AM–12 PM—(1 flights)
  • 12–3 PM53%(15 flights)
  • 3–6 PM50%(247 flights)
  • 6–9 PM63%(48 flights)
On-time trend by month
56%
May

Jun 43% → May 56% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202543%30
July 202517%29
August 202553%30
September 202560%30
October 202571%31
November 202546%26
December 202539%28
January 202674%27
February 202668%28
March 202652%27
April 202656%27
May 202656%18
Departures on time
64%
Diverted
0%
Flights flown
331
Months covered
12

Keep nerding

Based on 351 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.