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Flight Reliability

AA 3631 · American Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and AA 3631 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

84%
Arrive within 15 minutes
4 min
Average arrival delay
2.4%
Cancelled
8 min early
Median arrival delay

Based on 380 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon81%(57 flights)
  • Tue89%(54 flights)
  • Wed78%(59 flights)
  • Thu86%(57 flights)
  • Fri86%(56 flights)
  • Sat90%(29 flights)
  • Sun79%(57 flights)
On-time by departure window
  • 6–9 AM83%(115 flights)
  • 9 AM–12 PM82%(33 flights)
  • 12–3 PM82%(99 flights)
  • 6–9 PM84%(74 flights)
  • 9 PM–12 AM90%(48 flights)
On-time trend by month
87%
May

Jun 81% → May 87% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202581%26
July 202569%26
August 202585%26
September 202592%47
October 202573%33
November 202584%43
December 202581%26
January 202689%28
February 202688%24
March 202679%29
April 202690%30
May 202687%31
Departures on time
84%
Diverted
0.5%
Flights flown
369
Months covered
12

Keep nerding

Based on 380 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.