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Flight Reliability

AA 4039 · American Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and AA 4039 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

88%
Arrive within 15 minutes
0 min
Average arrival delay
2.3%
Cancelled
8 min early
Median arrival delay

Based on 394 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon81%(58 flights)
  • Tue92%(61 flights)
  • Wed85%(67 flights)
  • Thu90%(48 flights)
  • Fri96%(56 flights)
  • Sat89%(44 flights)
  • Sun84%(51 flights)
On-time by departure window
  • 6–9 AM91%(76 flights)
  • 9 AM–12 PM90%(241 flights)
  • 12–3 PM94%(18 flights)
  • 3–6 PM—(6 flights)
  • 6–9 PM80%(44 flights)
On-time trend by month
70%
May

Aug 100% → May 70% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
August 2025100%26
November 202587%54
December 202584%62
January 202687%55
February 202693%55
March 202695%62
April 202691%35
May 202670%20
Departures on time
87%
Diverted
0%
Flights flown
385
Months covered
12

Keep nerding

Based on 394 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.