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Flight Reliability

UA 4435 · United Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and UA 4435 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

69%
Arrive within 15 minutes
24 min
Average arrival delay
3.6%
Cancelled
1 min
Median arrival delay

Based on 274 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon63%(38 flights)
  • Tue76%(37 flights)
  • Wed49%(39 flights)
  • Thu67%(39 flights)
  • Fri66%(38 flights)
  • Sat83%(35 flights)
  • Sun80%(35 flights)
On-time by departure window
  • 6–9 AM—(1 flights)
  • 12–3 PM60%(131 flights)
  • 3–6 PM75%(64 flights)
  • 6–9 PM73%(33 flights)
  • 9 PM–12 AM91%(32 flights)
On-time trend by month
81%
May

Jun 53% → May 81% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202553%15
July 202550%26
August 202565%31
September 202570%27
October 202592%25
January 202674%23
February 202669%26
March 202663%27
April 202663%30
May 202681%31
Departures on time
72%
Diverted
1.1%
Flights flown
261
Months covered
10

Keep nerding

Based on 274 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.