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Flight Reliability

UA 5257 · United Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and UA 5257 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

76%
Arrive within 15 minutes
13 min
Average arrival delay
1.9%
Cancelled
7 min early
Median arrival delay

Based on 363 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon77%(48 flights)
  • Tue73%(52 flights)
  • Wed75%(52 flights)
  • Thu84%(49 flights)
  • Fri75%(51 flights)
  • Sat84%(50 flights)
  • Sun66%(53 flights)
On-time by departure window
  • 6–9 AM93%(41 flights)
  • 12–3 PM63%(43 flights)
  • 3–6 PM69%(62 flights)
  • 6–9 PM51%(45 flights)
  • 9 PM–12 AM85%(164 flights)
On-time trend by month
77%
May

Jun 53% → May 77% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202553%30
July 202561%28
August 202565%31
September 202593%30
October 2025100%31
November 202597%29
December 202559%29
January 202690%29
February 202693%28
March 202673%30
April 202652%29
May 202677%31
Departures on time
77%
Diverted
0.3%
Flights flown
355
Months covered
12

Keep nerding

Based on 363 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.