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Flight Reliability

UA 671 · United Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and UA 671 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

84%
Arrive within 15 minutes
4 min
Average arrival delay
0.8%
Cancelled
5 min early
Median arrival delay

Based on 594 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon84%(85 flights)
  • Tue91%(80 flights)
  • Wed89%(80 flights)
  • Thu80%(84 flights)
  • Fri80%(86 flights)
  • Sat87%(85 flights)
  • Sun80%(86 flights)
On-time by departure window
  • 6–9 AM87%(230 flights)
  • 9 AM–12 PM83%(356 flights)
On-time trend by month
84%
May

Jun 89% → May 84% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202589%35
July 202577%60
August 202588%48
September 202593%30
October 202581%37
November 202590%60
December 202576%45
January 202676%58
February 202686%35
March 202689%56
April 202688%60
May 202684%62
Departures on time
87%
Diverted
0.5%
Flights flown
586
Months covered
12

Keep nerding

Based on 594 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.