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Flight Reliability

UA 6138 · United Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and UA 6138 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

83%
Arrive within 15 minutes
8 min
Average arrival delay
1.7%
Cancelled
12 min early
Median arrival delay

Based on 298 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon74%(39 flights)
  • Tue89%(36 flights)
  • Wed90%(41 flights)
  • Thu86%(43 flights)
  • Fri70%(47 flights)
  • Sat91%(42 flights)
  • Sun82%(45 flights)
On-time by departure window
  • 12–3 PM81%(63 flights)
  • 3–6 PM80%(50 flights)
  • 6–9 PM84%(139 flights)
  • 9 PM–12 AM88%(41 flights)
On-time trend by month
93%
May

Jun 76% → May 93% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202576%25
August 202563%19
September 202593%27
October 202574%23
November 202563%30
December 202597%30
January 202681%26
February 2026100%26
March 202681%21
April 202683%29
May 202693%28
Departures on time
84%
Diverted
0%
Flights flown
293
Months covered
12

Keep nerding

Based on 298 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.