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Flight Reliability

UA 1623 · United Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and UA 1623 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

83%
Arrive within 15 minutes
5 min
Average arrival delay
0.6%
Cancelled
7 min early
Median arrival delay

Based on 349 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon91%(57 flights)
  • Tue77%(53 flights)
  • Wed85%(48 flights)
  • Thu78%(54 flights)
  • Fri84%(56 flights)
  • Sat92%(26 flights)
  • Sun76%(53 flights)
On-time by departure window
  • 6–9 AM94%(31 flights)
  • 9 AM–12 PM83%(42 flights)
  • 12–3 PM82%(11 flights)
  • 3–6 PM89%(78 flights)
  • 6–9 PM78%(185 flights)
On-time trend by month
90%
May

Jun 83% → May 90% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202583%53
July 202550%16
August 202583%30
September 202576%29
October 202596%27
November 202579%24
December 202577%30
January 202688%25
February 202685%27
March 202691%21
April 202681%26
May 202690%39
Departures on time
80%
Diverted
0%
Flights flown
347
Months covered
12

Keep nerding

Based on 349 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.