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Flight Reliability

UA 499 · United Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and UA 499 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

76%
Arrive within 15 minutes
10 min
Average arrival delay
1.3%
Cancelled
2 min early
Median arrival delay

Based on 620 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon71%(92 flights)
  • Tue81%(91 flights)
  • Wed79%(87 flights)
  • Thu73%(89 flights)
  • Fri72%(88 flights)
  • Sat80%(75 flights)
  • Sun74%(90 flights)
On-time by departure window
  • 6–9 AM72%(157 flights)
  • 9 AM–12 PM85%(303 flights)
  • 12–3 PM—(4 flights)
  • 3–6 PM30%(10 flights)
  • 6–9 PM64%(138 flights)
On-time trend by month
66%
May

Jun 57% → May 66% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202557%30
July 202590%31
August 202574%31
September 202589%36
October 202587%60
November 202560%53
December 202575%71
January 202682%65
February 202685%39
March 202686%36
April 202670%83
May 202666%77
Departures on time
76%
Diverted
0%
Flights flown
612
Months covered
12

Keep nerding

Based on 620 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.