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Flight Reliability

AA 3721 · American Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and AA 3721 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

76%
Arrive within 15 minutes
11 min
Average arrival delay
2.0%
Cancelled
1 min early
Median arrival delay

Based on 408 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon68%(59 flights)
  • Tue84%(63 flights)
  • Wed73%(60 flights)
  • Thu86%(57 flights)
  • Fri76%(59 flights)
  • Sat73%(45 flights)
  • Sun68%(56 flights)
On-time by departure window
  • 6–9 AM88%(72 flights)
  • 9 AM–12 PM75%(28 flights)
  • 12–3 PM81%(158 flights)
  • 3–6 PM63%(129 flights)
  • 6–9 PM75%(12 flights)
On-time trend by month
78%
May

Jun 69% → May 78% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202569%29
July 202550%30
August 202574%31
October 202571%48
November 202574%54
December 202569%42
January 202694%51
February 202696%22
March 202675%20
April 202679%29
May 202678%41
Departures on time
78%
Diverted
0.2%
Flights flown
399
Months covered
12

Keep nerding

Based on 408 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.