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Flight Reliability

UA 3566 · United Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and UA 3566 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

73%
Arrive within 15 minutes
17 min
Average arrival delay
3.3%
Cancelled
5 min early
Median arrival delay

Based on 307 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon67%(42 flights)
  • Tue76%(38 flights)
  • Wed65%(43 flights)
  • Thu76%(42 flights)
  • Fri69%(45 flights)
  • Sat84%(44 flights)
  • Sun74%(42 flights)
On-time by departure window
  • 6–9 AM—(4 flights)
  • 12–3 PM78%(32 flights)
  • 3–6 PM72%(204 flights)
  • 6–9 PM71%(35 flights)
  • 9 PM–12 AM76%(21 flights)
On-time trend by month
81%
May

Jun 40% → May 81% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202540%25
July 202548%29
August 202561%18
October 202580%30
November 202567%27
December 202587%15
January 202686%29
February 202692%26
March 202674%31
April 202679%29
May 202681%31
Departures on time
77%
Diverted
0.3%
Flights flown
296
Months covered
12

Keep nerding

Based on 307 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.