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Flight Reliability

UA 1904 · United Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and UA 1904 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

65%
Arrive within 15 minutes
18 min
Average arrival delay
1.6%
Cancelled
1 min early
Median arrival delay

Based on 253 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon74%(39 flights)
  • Tue71%(41 flights)
  • Wed68%(38 flights)
  • Thu56%(39 flights)
  • Fri54%(41 flights)
  • Sat80%(10 flights)
  • Sun63%(40 flights)
On-time by departure window
  • 9 AM–12 PM84%(32 flights)
  • 3–6 PM79%(24 flights)
  • 6–9 PM60%(192 flights)
On-time trend by month
68%
May

Jun 50% → May 68% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202550%26
July 202536%25
August 202562%26
September 202577%26
October 202569%26
November 202565%23
December 202550%14
March 202682%27
April 202680%30
May 202668%25
Departures on time
71%
Diverted
0.4%
Flights flown
248
Months covered
10

Keep nerding

Based on 253 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.