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Flight Reliability

AA 4021 · American Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and AA 4021 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

83%
Arrive within 15 minutes
5 min
Average arrival delay
0.7%
Cancelled
10 min early
Median arrival delay

Based on 293 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon85%(39 flights)
  • Tue88%(40 flights)
  • Wed90%(40 flights)
  • Thu80%(40 flights)
  • Fri77%(39 flights)
  • Sat83%(52 flights)
  • Sun78%(41 flights)
On-time by departure window
  • 6–9 AM83%(76 flights)
  • 3–6 PM83%(205 flights)
  • 6–9 PM80%(10 flights)
On-time trend by month
74%
May

Jun 73% → May 74% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202573%30
July 202583%30
August 202587%31
September 202590%29
October 202584%31
November 202593%28
December 202574%31
April 202696%25
May 202674%39
Departures on time
86%
Diverted
0%
Flights flown
291
Months covered
12

Keep nerding

Based on 293 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.