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Flight Reliability

UA 1791 · United Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and UA 1791 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

67%
Arrive within 15 minutes
12 min
Average arrival delay
0%
Cancelled
1 min
Median arrival delay

Based on 497 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon73%(80 flights)
  • Tue59%(66 flights)
  • Wed71%(65 flights)
  • Thu66%(73 flights)
  • Fri68%(74 flights)
  • Sat56%(55 flights)
  • Sun71%(83 flights)
On-time by departure window
  • 6–9 AM95%(20 flights)
  • 9 AM–12 PM62%(336 flights)
  • 12–3 PM75%(140 flights)
On-time trend by month
48%
May

Jun 77% → May 48% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202577%31
July 202567%57
August 202578%55
September 202575%40
October 202567%30
November 202559%29
December 202545%31
January 202678%37
February 202658%33
March 202691%33
April 202663%60
May 202648%60
Departures on time
81%
Diverted
0.2%
Flights flown
496
Months covered
12

Keep nerding

Based on 497 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.