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Flight Reliability

UA 5271 · United Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and UA 5271 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

79%
Arrive within 15 minutes
12 min
Average arrival delay
3.3%
Cancelled
11 min early
Median arrival delay

Based on 300 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon79%(42 flights)
  • Tue83%(42 flights)
  • Wed81%(42 flights)
  • Thu81%(41 flights)
  • Fri76%(41 flights)
  • Sat77%(39 flights)
  • Sun76%(42 flights)
On-time by departure window
  • 9 AM–12 PM65%(20 flights)
  • 12–3 PM93%(14 flights)
  • 3–6 PM94%(49 flights)
  • 6–9 PM71%(167 flights)
  • 9 PM–12 AM97%(39 flights)
On-time trend by month
71%
May

Jun 93% → May 71% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202593%30
July 202583%30
August 202597%30
September 202581%26
October 202577%31
November 202575%20
December 202562%26
January 202662%13
March 2026100%27
April 202643%21
May 202671%31
Departures on time
76%
Diverted
0.3%
Flights flown
289
Months covered
12

Keep nerding

Based on 300 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.