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Flight Reliability

UA 4247 · United Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and UA 4247 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

80%
Arrive within 15 minutes
10 min
Average arrival delay
2.0%
Cancelled
9 min early
Median arrival delay

Based on 345 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon80%(50 flights)
  • Tue79%(48 flights)
  • Wed82%(49 flights)
  • Thu77%(51 flights)
  • Fri74%(49 flights)
  • Sat87%(47 flights)
  • Sun81%(43 flights)
On-time by departure window
  • 3–6 AM91%(23 flights)
  • 6–9 AM86%(35 flights)
  • 12–3 PM79%(224 flights)
  • 6–9 PM67%(12 flights)
  • 9 PM–12 AM77%(43 flights)
On-time trend by month
84%
May

Jun 61% → May 84% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202561%28
July 202581%26
August 202580%30
September 202582%27
October 202590%31
November 202588%25
December 202548%25
January 202679%28
February 202689%26
March 202690%30
April 202683%30
May 202684%31
Departures on time
81%
Diverted
0.3%
Flights flown
337
Months covered
12

Keep nerding

Based on 345 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.