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Flight Reliability

UA 3689 · United Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and UA 3689 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
8.1%
Cancelled
9 min early
Median arrival delay

Based on 346 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon72%(46 flights)
  • Tue76%(49 flights)
  • Wed73%(45 flights)
  • Thu79%(47 flights)
  • Fri76%(46 flights)
  • Sat74%(35 flights)
  • Sun70%(50 flights)
On-time by departure window
  • 6–9 AM97%(35 flights)
  • 9 AM–12 PM87%(67 flights)
  • 12–3 PM90%(59 flights)
  • 3–6 PM59%(96 flights)
  • 6–9 PM56%(61 flights)
On-time trend by month
95%
May

Jun 44% → May 95% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202544%27
July 202541%22
August 202593%29
September 202592%26
October 202586%28
November 202589%27
December 202571%34
January 202681%16
February 202692%26
March 202643%35
April 202676%29
May 202695%19
Departures on time
79%
Diverted
0%
Flights flown
318
Months covered
12

Keep nerding

Based on 346 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.