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Flight Reliability

UA 4517 · United Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and UA 4517 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

68%
Arrive within 15 minutes
22 min
Average arrival delay
3.8%
Cancelled
4 min early
Median arrival delay

Based on 315 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon75%(48 flights)
  • Tue74%(35 flights)
  • Wed67%(36 flights)
  • Thu67%(49 flights)
  • Fri60%(47 flights)
  • Sat73%(40 flights)
  • Sun64%(47 flights)
On-time by departure window
  • 6–9 AM82%(38 flights)
  • 9 AM–12 PM82%(11 flights)
  • 12–3 PM68%(238 flights)
  • 3–6 PM27%(15 flights)
On-time trend by month
72%
May

Jun 80% → May 72% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202580%30
July 202529%21
August 202567%18
September 202582%17
October 202574%19
November 202548%25
December 202546%28
January 202662%29
February 202679%28
March 202675%28
April 202697%30
May 202672%29
Departures on time
71%
Diverted
0.3%
Flights flown
302
Months covered
12

Keep nerding

Based on 315 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.