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Flight Reliability

UA 3615 · United Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and UA 3615 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

74%
Arrive within 15 minutes
13 min
Average arrival delay
5.8%
Cancelled
7 min early
Median arrival delay

Based on 330 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon72%(43 flights)
  • Tue75%(48 flights)
  • Wed72%(46 flights)
  • Thu77%(43 flights)
  • Fri66%(47 flights)
  • Sat88%(42 flights)
  • Sun71%(41 flights)
On-time by departure window
  • 12–3 AM—(1 flights)
  • 3–6 AM—(6 flights)
  • 6–9 AM96%(71 flights)
  • 9 AM–12 PM80%(61 flights)
  • 12–3 PM71%(34 flights)
  • 3–6 PM61%(137 flights)
On-time trend by month
76%
May

Jun 54% → May 76% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202554%13
July 202561%23
August 202556%27
September 202559%27
October 2025100%26
December 202561%28
January 202684%31
February 202693%28
March 202675%51
April 202679%29
May 202676%21
Departures on time
74%
Diverted
0.3%
Flights flown
310
Months covered
12

Keep nerding

Based on 330 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.