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Flight Reliability

AA 4520 · American Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and AA 4520 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

68%
Arrive within 15 minutes
23 min
Average arrival delay
9.7%
Cancelled
2 min early
Median arrival delay

Based on 299 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon75%(40 flights)
  • Tue65%(43 flights)
  • Wed72%(36 flights)
  • Thu74%(42 flights)
  • Fri72%(46 flights)
  • Sat56%(18 flights)
  • Sun56%(43 flights)
On-time by departure window
  • 6–9 AM80%(10 flights)
  • 9 AM–12 PM71%(28 flights)
  • 12–3 PM67%(64 flights)
  • 3–6 PM—(5 flights)
  • 6–9 PM68%(159 flights)
  • 9 PM–12 AM—(2 flights)
On-time trend by month
61%
May

Jun 42% → May 61% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202542%24
July 202557%21
August 202562%26
September 202585%26
October 202577%26
December 202557%23
January 202685%27
February 202668%37
March 202667%12
April 202686%21
May 202661%23
Departures on time
72%
Diverted
0.7%
Flights flown
268
Months covered
12

Keep nerding

Based on 299 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.