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Flight Reliability

UA 435 · United Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and UA 435 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

79%
Arrive within 15 minutes
9 min
Average arrival delay
1.6%
Cancelled
6 min early
Median arrival delay

Based on 490 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon78%(69 flights)
  • Tue85%(65 flights)
  • Wed77%(64 flights)
  • Thu83%(71 flights)
  • Fri85%(71 flights)
  • Sat73%(70 flights)
  • Sun74%(70 flights)
On-time by departure window
  • 3–6 AM96%(25 flights)
  • 6–9 AM88%(260 flights)
  • 9 AM–12 PM60%(85 flights)
  • 12–3 PM79%(14 flights)
  • 6–9 PM69%(96 flights)
On-time trend by month
90%
May

Jun 74% → May 90% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202574%39
July 202577%61
August 202559%29
October 202573%37
November 202568%56
December 202565%31
January 202683%30
February 202685%27
March 202689%55
April 2026100%32
May 202690%76
Departures on time
80%
Diverted
0.4%
Flights flown
480
Months covered
12

Keep nerding

Based on 490 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.