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Flight Reliability

AA 3966 · American Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and AA 3966 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
5 min
Average arrival delay
1.2%
Cancelled
5 min early
Median arrival delay

Based on 517 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon68%(77 flights)
  • Tue94%(70 flights)
  • Wed86%(66 flights)
  • Thu86%(73 flights)
  • Fri76%(76 flights)
  • Sat82%(72 flights)
  • Sun63%(75 flights)
On-time by departure window
  • 9 AM–12 PM83%(98 flights)
  • 12–3 PM—(4 flights)
  • 3–6 PM76%(62 flights)
  • 6–9 PM79%(345 flights)
On-time trend by month
100%
May

Jun 71% → May 100% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202571%31
July 202574%27
August 202573%30
September 202572%29
October 202578%45
November 202572%54
December 202591%58
January 202689%62
February 202677%56
March 202669%62
April 202683%35
May 2026100%20
Departures on time
82%
Diverted
0.4%
Flights flown
509
Months covered
12

Keep nerding

Based on 517 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.