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Flight Reliability

UA 204 · United Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and UA 204 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

90%
Arrive within 15 minutes
3 min early
Average arrival delay
1.1%
Cancelled
9 min early
Median arrival delay

Based on 378 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon89%(56 flights)
  • Tue94%(51 flights)
  • Wed94%(52 flights)
  • Thu89%(53 flights)
  • Fri85%(54 flights)
  • Sat85%(53 flights)
  • Sun96%(54 flights)
On-time by departure window
  • 3–6 AM84%(25 flights)
  • 6–9 AM90%(123 flights)
  • 9 AM–12 PM93%(136 flights)
  • 12–3 PM89%(89 flights)
On-time trend by month
90%
May

Jun 80% → May 90% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202580%55
July 202597%31
August 202586%28
September 202597%29
October 202582%28
November 202596%23
December 202592%26
January 202687%30
February 202694%31
March 202697%32
April 202697%30
May 202690%30
Departures on time
88%
Diverted
0.3%
Flights flown
373
Months covered
12

Keep nerding

Based on 378 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.