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Flight Reliability

UA 2004 · United Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and UA 2004 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
6 min
Average arrival delay
1.2%
Cancelled
5 min early
Median arrival delay

Based on 258 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon78%(41 flights)
  • Tue80%(40 flights)
  • Wed73%(33 flights)
  • Thu84%(38 flights)
  • Fri74%(39 flights)
  • Sat85%(27 flights)
  • Sun81%(37 flights)
On-time by departure window
  • 6–9 AM90%(62 flights)
  • 9 AM–12 PM—(8 flights)
  • 12–3 PM74%(49 flights)
  • 3–6 PM76%(136 flights)
On-time trend by month
93%
May

Jun 74% → May 93% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202574%53
July 202578%18
August 202580%10
November 202584%19
December 202581%32
January 202688%25
February 202671%28
April 202677%30
May 202693%28
Departures on time
80%
Diverted
0%
Flights flown
255
Months covered
12

Keep nerding

Based on 258 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.