Skip to content
WanderNerd
Check a flight

Flight Reliability

UA 5397 · United Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and UA 5397 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
10 min
Average arrival delay
0.3%
Cancelled
6 min early
Median arrival delay

Based on 306 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon84%(44 flights)
  • Tue85%(33 flights)
  • Wed77%(39 flights)
  • Thu83%(47 flights)
  • Fri73%(48 flights)
  • Sat73%(40 flights)
  • Sun81%(53 flights)
On-time by departure window
  • 9 AM–12 PM—(4 flights)
  • 12–3 PM71%(62 flights)
  • 3–6 PM84%(214 flights)
  • 6–9 PM67%(24 flights)
On-time trend by month
77%
May

Jun 64% → May 77% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202564%33
July 202590%31
August 202587%30
September 202588%17
November 202574%19
December 202555%22
January 202681%31
February 202693%28
March 202688%25
April 202686%29
May 202677%31
Departures on time
82%
Diverted
0.3%
Flights flown
304
Months covered
12

Keep nerding

Based on 306 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.