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Flight Reliability

UA 4310 · United Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and UA 4310 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

85%
Arrive within 15 minutes
2 min
Average arrival delay
1.0%
Cancelled
8 min early
Median arrival delay

Based on 304 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon77%(43 flights)
  • Tue94%(36 flights)
  • Wed92%(36 flights)
  • Thu86%(42 flights)
  • Fri87%(47 flights)
  • Sat84%(50 flights)
  • Sun80%(46 flights)
On-time by departure window
  • 6–9 AM—(8 flights)
  • 9 AM–12 PM90%(86 flights)
  • 12–3 PM86%(137 flights)
  • 3–6 PM77%(69 flights)
On-time trend by month
83%
May

Jun 58% → May 83% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202558%12
July 202576%21
August 202582%27
September 202583%30
October 202583%29
November 2025100%20
December 202582%17
January 202684%31
February 202696%25
March 202690%30
April 202693%29
May 202683%29
Departures on time
86%
Diverted
0.3%
Flights flown
300
Months covered
12

Keep nerding

Based on 304 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.