Skip to content
WanderNerd
Check a flight

Flight Reliability

UA 1599 · United Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and UA 1599 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
11 min
Average arrival delay
0.5%
Cancelled
4 min early
Median arrival delay

Based on 410 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon81%(58 flights)
  • Tue84%(57 flights)
  • Wed74%(57 flights)
  • Thu78%(59 flights)
  • Fri75%(59 flights)
  • Sat79%(58 flights)
  • Sun80%(59 flights)
On-time by departure window
  • 6–9 AM90%(100 flights)
  • 9 AM–12 PM74%(269 flights)
  • 12–3 PM—(1 flights)
  • 3–6 PM84%(37 flights)
On-time trend by month
81%
May

Jun 97% → May 81% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202597%30
July 202587%31
August 202584%31
September 202587%30
October 202581%31
November 202587%30
December 202552%31
January 202668%31
February 202677%44
March 202672%57
April 202680%30
May 202681%31
Departures on time
85%
Diverted
0.2%
Flights flown
407
Months covered
12

Keep nerding

Based on 410 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.