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Flight Reliability

UA 2171 · United Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and UA 2171 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

75%
Arrive within 15 minutes
16 min
Average arrival delay
0.5%
Cancelled
5 min early
Median arrival delay

Based on 403 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon75%(55 flights)
  • Tue78%(46 flights)
  • Wed82%(54 flights)
  • Thu70%(60 flights)
  • Fri75%(63 flights)
  • Sat74%(57 flights)
  • Sun75%(63 flights)
On-time by departure window
  • 3–6 PM70%(235 flights)
  • 6–9 PM82%(138 flights)
  • 9 PM–12 AM88%(25 flights)
On-time trend by month
92%
May

Jun 47% → May 92% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202547%30
July 202563%30
August 202543%30
September 202587%30
October 202578%36
November 202589%55
December 202582%44
January 202694%36
February 202682%44
March 202665%26
April 202639%13
May 202692%24
Departures on time
77%
Diverted
0.7%
Flights flown
398
Months covered
12

Keep nerding

Based on 403 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.