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Flight Reliability

UA 4170 · United Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and UA 4170 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

71%
Arrive within 15 minutes
23 min
Average arrival delay
2.0%
Cancelled
1 min early
Median arrival delay

Based on 352 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon66%(47 flights)
  • Tue83%(48 flights)
  • Wed73%(51 flights)
  • Thu78%(49 flights)
  • Fri65%(51 flights)
  • Sat71%(48 flights)
  • Sun60%(50 flights)
On-time by departure window
  • 6–9 AM78%(74 flights)
  • 9 AM–12 PM81%(109 flights)
  • 12–3 PM56%(103 flights)
  • 3–6 PM66%(47 flights)
  • 6–9 PM73%(11 flights)
On-time trend by month
74%
May

Jun 46% → May 74% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202546%11
July 202565%31
August 202563%27
September 202597%29
October 202587%31
November 202583%29
December 202565%31
January 202658%31
February 202668%25
March 202655%31
April 202673%30
May 202674%38
Departures on time
75%
Diverted
0.3%
Flights flown
344
Months covered
12

Keep nerding

Based on 352 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.