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Flight Reliability

UA 2123 · United Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and UA 2123 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

63%
Arrive within 15 minutes
24 min
Average arrival delay
0.2%
Cancelled
6 min
Median arrival delay

Based on 532 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon66%(77 flights)
  • Tue63%(73 flights)
  • Wed71%(77 flights)
  • Thu62%(73 flights)
  • Fri53%(76 flights)
  • Sat73%(75 flights)
  • Sun55%(77 flights)
On-time by departure window
  • 3–6 PM60%(315 flights)
  • 6–9 PM68%(44 flights)
  • 9 PM–12 AM68%(169 flights)
On-time trend by month
58%
May

Jun 23% → May 58% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202523%30
July 202537%30
August 202533%30
September 202563%30
October 202549%37
November 202574%57
December 202566%32
January 202671%56
February 202680%54
March 202684%62
April 202670%60
May 202658%50
Departures on time
71%
Diverted
0.6%
Flights flown
528
Months covered
12

Keep nerding

Based on 532 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.