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Flight Reliability

AA 5121 · American Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and AA 5121 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

70%
Arrive within 15 minutes
24 min
Average arrival delay
3.4%
Cancelled
2 min early
Median arrival delay

Based on 357 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon71%(51 flights)
  • Tue87%(52 flights)
  • Wed86%(49 flights)
  • Thu66%(50 flights)
  • Fri64%(50 flights)
  • Sat53%(40 flights)
  • Sun63%(51 flights)
On-time by departure window
  • 3–6 AM—(4 flights)
  • 6–9 AM92%(12 flights)
  • 9 AM–12 PM100%(10 flights)
  • 12–3 PM77%(91 flights)
  • 3–6 PM44%(63 flights)
  • 6–9 PM73%(141 flights)
  • 9 PM–12 AM73%(22 flights)
On-time trend by month
86%
May

Jun 44% → May 86% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202544%27
July 202538%24
August 202563%48
September 202594%16
October 202579%34
November 202572%29
December 202560%30
January 202685%27
February 202686%28
March 202672%29
April 202676%29
May 202686%22
Departures on time
70%
Diverted
0.6%
Flights flown
343
Months covered
12

Keep nerding

Based on 357 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.