Skip to content
WanderNerd
Check a flight

Flight Reliability

AA 3840 · American Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and AA 3840 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

86%
Arrive within 15 minutes
1 min
Average arrival delay
4.0%
Cancelled
8 min early
Median arrival delay

Based on 202 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon82%(27 flights)
  • Tue83%(30 flights)
  • Wed93%(27 flights)
  • Thu96%(27 flights)
  • Fri75%(28 flights)
  • Sat83%(24 flights)
  • Sun87%(30 flights)
On-time by departure window
  • 12–3 PM91%(11 flights)
  • 3–6 PM80%(44 flights)
  • 6–9 PM84%(45 flights)
  • 9 PM–12 AM88%(93 flights)
On-time trend by month
79%
May

Oct 79% → May 79% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
October 202579%33
November 202573%26
December 202593%29
January 202689%27
February 202691%21
March 202690%30
May 202679%14
Departures on time
89%
Diverted
0.5%
Flights flown
193
Months covered
9

Keep nerding

Based on 202 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.