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Flight Reliability

UA 434 · United Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and UA 434 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
1 min early
Average arrival delay
1.4%
Cancelled
10 min early
Median arrival delay

Based on 569 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon85%(82 flights)
  • Tue81%(77 flights)
  • Wed82%(77 flights)
  • Thu83%(80 flights)
  • Fri86%(81 flights)
  • Sat84%(80 flights)
  • Sun77%(82 flights)
On-time by departure window
  • 6–9 AM92%(89 flights)
  • 9 AM–12 PM85%(97 flights)
  • 12–3 PM83%(72 flights)
  • 3–6 PM77%(194 flights)
  • 6–9 PM—(1 flights)
  • 9 PM–12 AM82%(106 flights)
On-time trend by month
93%
May

Jun 91% → May 93% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202591%58
July 202592%61
August 202588%49
September 202590%30
October 202589%36
November 202561%59
December 202575%67
January 202683%40
February 202671%62
March 202684%38
April 202693%29
May 202693%30
Departures on time
83%
Diverted
0.4%
Flights flown
559
Months covered
12

Keep nerding

Based on 569 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.