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Flight Reliability

AA 4638 · American Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and AA 4638 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

85%
Arrive within 15 minutes
2 min
Average arrival delay
1.7%
Cancelled
10 min early
Median arrival delay

Based on 348 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon87%(61 flights)
  • Tue83%(47 flights)
  • Wed96%(45 flights)
  • Thu84%(56 flights)
  • Fri80%(45 flights)
  • Sat82%(39 flights)
  • Sun80%(49 flights)
On-time by departure window
  • 3–6 AM—(8 flights)
  • 6–9 AM90%(164 flights)
  • 9 AM–12 PM94%(65 flights)
  • 12–3 PM85%(13 flights)
  • 3–6 PM—(4 flights)
  • 6–9 PM66%(56 flights)
  • 9 PM–12 AM72%(32 flights)
On-time trend by month
91%
May

Jun 92% → May 91% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202592%26
July 202588%48
August 202571%31
September 202582%28
October 2025100%30
November 202576%29
December 202555%22
January 202683%30
February 202683%12
March 202691%34
April 202694%31
May 202691%21
Departures on time
86%
Diverted
0%
Flights flown
342
Months covered
12

Keep nerding

Based on 348 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.