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Flight Reliability

UA 1004 · United Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and UA 1004 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

81%
Arrive within 15 minutes
11 min
Average arrival delay
1.8%
Cancelled
8 min early
Median arrival delay

Based on 273 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon74%(38 flights)
  • Tue81%(41 flights)
  • Wed76%(41 flights)
  • Thu83%(41 flights)
  • Fri88%(42 flights)
  • Sat82%(28 flights)
  • Sun81%(36 flights)
On-time by departure window
  • 6–9 AM92%(26 flights)
  • 12–3 PM76%(128 flights)
  • 3–6 PM83%(59 flights)
  • 6–9 PM83%(54 flights)
On-time trend by month
68%
Mar

Aug 83% → Mar 68% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
August 202583%23
September 202575%63
October 202588%73
November 202583%29
January 202683%24
February 202681%26
March 202668%28
Departures on time
79%
Diverted
0.4%
Flights flown
267
Months covered
8

Keep nerding

Based on 273 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.