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Flight Reliability

UA 1871 · United Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and UA 1871 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

81%
Arrive within 15 minutes
11 min
Average arrival delay
0.7%
Cancelled
7 min early
Median arrival delay

Based on 555 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon83%(81 flights)
  • Tue87%(75 flights)
  • Wed87%(82 flights)
  • Thu76%(80 flights)
  • Fri78%(82 flights)
  • Sat77%(68 flights)
  • Sun81%(83 flights)
On-time by departure window
  • 3–6 PM78%(175 flights)
  • 6–9 PM87%(293 flights)
  • 9 PM–12 AM66%(83 flights)
On-time trend by month
83%
May

Jun 85% → May 83% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202585%59
July 202561%54
August 202583%58
September 202590%60
October 202586%62
November 202572%58
December 202579%61
January 202681%31
February 202696%25
March 202682%28
April 202689%26
May 202683%29
Departures on time
82%
Diverted
0%
Flights flown
551
Months covered
12

Keep nerding

Based on 555 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.