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Flight Reliability

AA 3639 · American Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and AA 3639 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

87%
Arrive within 15 minutes
1 min early
Average arrival delay
1.2%
Cancelled
11 min early
Median arrival delay

Based on 432 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon84%(64 flights)
  • Tue91%(63 flights)
  • Wed91%(57 flights)
  • Thu86%(64 flights)
  • Fri83%(65 flights)
  • Sat93%(45 flights)
  • Sun85%(66 flights)
On-time by departure window
  • 3–6 AM87%(15 flights)
  • 6–9 AM92%(110 flights)
  • 9 AM–12 PM83%(124 flights)
  • 12–3 PM90%(143 flights)
  • 3–6 PM88%(17 flights)
  • 6–9 PM67%(15 flights)
On-time trend by month
83%
May

Jun 73% → May 83% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202573%48
July 202587%54
August 202570%33
September 202590%30
October 202590%31
December 2025100%12
February 202694%34
March 202695%60
April 202695%57
May 202683%60
Departures on time
88%
Diverted
0.7%
Flights flown
424
Months covered
12

Keep nerding

Based on 432 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.