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Flight Reliability

AA 3939 · American Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and AA 3939 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

80%
Arrive within 15 minutes
7 min
Average arrival delay
2.8%
Cancelled
6 min early
Median arrival delay

Based on 463 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon82%(67 flights)
  • Tue92%(51 flights)
  • Wed72%(54 flights)
  • Thu70%(73 flights)
  • Fri75%(73 flights)
  • Sat89%(56 flights)
  • Sun81%(74 flights)
On-time by departure window
  • 6–9 AM—(9 flights)
  • 9 AM–12 PM—(9 flights)
  • 12–3 PM76%(117 flights)
  • 3–6 PM77%(190 flights)
  • 6–9 PM84%(109 flights)
  • 9 PM–12 AM93%(14 flights)
On-time trend by month
89%
May

Jun 77% → May 89% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202577%34
July 202577%34
August 202577%22
September 202579%57
October 2025100%10
December 202590%40
January 202656%34
February 202676%46
March 202678%58
April 202686%58
May 202689%54
Departures on time
80%
Diverted
0.4%
Flights flown
448
Months covered
12

Keep nerding

Based on 463 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.