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Flight Reliability

UA 5504 · United Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and UA 5504 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

82%
Arrive within 15 minutes
2 min
Average arrival delay
0.9%
Cancelled
15 min early
Median arrival delay

Based on 334 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon82%(50 flights)
  • Tue91%(42 flights)
  • Wed85%(48 flights)
  • Thu78%(51 flights)
  • Fri84%(51 flights)
  • Sat74%(38 flights)
  • Sun78%(51 flights)
On-time by departure window
  • 6–9 AM63%(30 flights)
  • 9 AM–12 PM—(8 flights)
  • 12–3 PM—(3 flights)
  • 3–6 PM85%(272 flights)
  • 9 PM–12 AM78%(18 flights)
On-time trend by month
79%
May

Jun 97% → May 79% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202597%30
July 202584%31
August 202596%28
September 202596%27
October 202577%31
November 202578%27
December 202570%23
January 202670%23
February 202688%24
March 202686%28
April 202660%30
May 202679%29
Departures on time
84%
Diverted
0%
Flights flown
331
Months covered
12

Keep nerding

Based on 334 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.