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Flight Reliability

UA 1823 · United Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and UA 1823 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

87%
Arrive within 15 minutes
1 min early
Average arrival delay
1.6%
Cancelled
11 min early
Median arrival delay

Based on 554 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon87%(77 flights)
  • Tue86%(80 flights)
  • Wed92%(79 flights)
  • Thu89%(78 flights)
  • Fri94%(77 flights)
  • Sat82%(74 flights)
  • Sun79%(80 flights)
On-time by departure window
  • 3–6 AM100%(21 flights)
  • 6–9 AM90%(329 flights)
  • 9 AM–12 PM79%(81 flights)
  • 12–3 PM81%(113 flights)
  • 6–9 PM—(1 flights)
On-time trend by month
88%
May

Jun 93% → May 88% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202593%29
July 202579%29
August 202572%60
September 202592%51
October 202590%31
November 202586%29
December 202581%31
January 202689%55
February 202698%55
March 202682%60
April 202693%56
May 202688%59
Departures on time
90%
Diverted
0%
Flights flown
545
Months covered
12

Keep nerding

Based on 554 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.