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Flight Reliability

AA 1638 · American Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and AA 1638 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

70%
Arrive within 15 minutes
15 min
Average arrival delay
2.0%
Cancelled
3 min early
Median arrival delay

Based on 392 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon64%(56 flights)
  • Tue71%(34 flights)
  • Wed74%(49 flights)
  • Thu71%(65 flights)
  • Fri68%(57 flights)
  • Sat69%(52 flights)
  • Sun70%(71 flights)
On-time by departure window
  • 6–9 AM—(5 flights)
  • 9 AM–12 PM81%(31 flights)
  • 12–3 PM94%(17 flights)
  • 3–6 PM64%(83 flights)
  • 6–9 PM68%(248 flights)
On-time trend by month
84%
May

Jun 63% → May 84% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202563%30
July 202535%29
August 202577%31
September 202572%18
October 202576%29
November 202580%30
December 202578%32
January 202676%29
February 202678%36
March 202652%50
April 202669%32
May 202684%38
Departures on time
68%
Diverted
0%
Flights flown
384
Months covered
12

Keep nerding

Based on 392 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.