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Flight Reliability

UA 234 · United Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and UA 234 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

70%
Arrive within 15 minutes
14 min
Average arrival delay
0.9%
Cancelled
1 min early
Median arrival delay

Based on 325 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon67%(45 flights)
  • Tue70%(47 flights)
  • Wed65%(48 flights)
  • Thu69%(45 flights)
  • Fri64%(45 flights)
  • Sat80%(44 flights)
  • Sun77%(47 flights)
On-time by departure window
  • 6–9 AM—(2 flights)
  • 9 AM–12 PM83%(52 flights)
  • 12–3 PM89%(37 flights)
  • 3–6 PM62%(218 flights)
  • 6–9 PM—(7 flights)
  • 9 PM–12 AM—(5 flights)
On-time trend by month
71%
May

Jun 48% → May 71% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202548%29
July 202539%31
August 202542%31
September 202569%29
October 202580%30
November 202580%30
December 2025100%17
January 202685%26
February 202685%27
April 202693%29
May 202671%35
Departures on time
78%
Diverted
0.3%
Flights flown
321
Months covered
12

Keep nerding

Based on 325 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.