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Flight Reliability

UA 797 · United Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and UA 797 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
5 min
Average arrival delay
0.7%
Cancelled
8 min early
Median arrival delay

Based on 282 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon81%(42 flights)
  • Tue88%(43 flights)
  • Wed78%(41 flights)
  • Thu83%(36 flights)
  • Fri75%(40 flights)
  • Sat78%(37 flights)
  • Sun70%(40 flights)
On-time by departure window
  • 3–6 AM—(2 flights)
  • 6–9 AM97%(59 flights)
  • 12–3 PM89%(36 flights)
  • 3–6 PM75%(36 flights)
  • 6–9 PM70%(142 flights)
  • 9 PM–12 AM—(4 flights)
On-time trend by month
86%
May

Aug 100% → May 86% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
August 2025100%13
September 202596%23
October 202589%37
November 202561%57
December 202583%18
January 202692%26
February 202664%28
March 202682%27
April 202672%29
May 202686%21
Departures on time
81%
Diverted
0.4%
Flights flown
279
Months covered
10

Keep nerding

Based on 282 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.