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Flight Reliability

AA 4139 · American Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and AA 4139 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

91%
Arrive within 15 minutes
0 min
Average arrival delay
0%
Cancelled
11 min early
Median arrival delay

Based on 323 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon88%(49 flights)
  • Tue96%(50 flights)
  • Wed94%(47 flights)
  • Thu92%(47 flights)
  • Fri94%(48 flights)
  • Sat97%(30 flights)
  • Sun82%(50 flights)
On-time by departure window
  • 3–6 AM100%(12 flights)
  • 6–9 AM96%(198 flights)
  • 9 AM–12 PM88%(59 flights)
  • 12–3 PM75%(52 flights)
On-time trend by month
90%
May

Jun 78% → May 90% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202578%50
July 202589%54
November 202596%27
December 202597%31
January 202697%31
February 202693%28
March 2026100%31
April 2026100%30
May 202690%31
Departures on time
91%
Diverted
0.6%
Flights flown
321
Months covered
10

Keep nerding

Based on 323 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.