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Flight Reliability

UA 2099 · United Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and UA 2099 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

77%
Arrive within 15 minutes
10 min
Average arrival delay
0.6%
Cancelled
0 min
Median arrival delay

Based on 680 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon72%(98 flights)
  • Tue85%(98 flights)
  • Wed77%(96 flights)
  • Thu78%(99 flights)
  • Fri77%(99 flights)
  • Sat75%(85 flights)
  • Sun75%(101 flights)
On-time by departure window
  • 6–9 AM74%(452 flights)
  • 9 AM–12 PM83%(205 flights)
  • 12–3 PM90%(19 flights)
On-time trend by month
87%
May

Jun 88% → May 87% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202588%57
July 202585%59
August 202586%59
September 202582%56
October 202585%52
November 202577%30
December 202561%59
January 202655%67
February 202678%55
March 202667%61
April 202678%60
May 202687%61
Departures on time
84%
Diverted
0%
Flights flown
676
Months covered
12

Keep nerding

Based on 680 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.