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Flight Reliability

AA 4377 · American Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and AA 4377 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

82%
Arrive within 15 minutes
1 min
Average arrival delay
2.2%
Cancelled
9 min early
Median arrival delay

Based on 445 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon75%(63 flights)
  • Tue86%(63 flights)
  • Wed85%(67 flights)
  • Thu84%(69 flights)
  • Fri71%(70 flights)
  • Sat88%(25 flights)
  • Sun86%(76 flights)
On-time by departure window
  • 3–6 AM—(4 flights)
  • 6–9 AM88%(152 flights)
  • 9 AM–12 PM82%(67 flights)
  • 12–3 PM82%(109 flights)
  • 3–6 PM83%(40 flights)
  • 6–9 PM67%(60 flights)
  • 9 PM–12 AM—(1 flights)
On-time trend by month
93%
May

Jun 67% → May 93% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202567%12
August 202580%44
September 202578%60
October 202586%49
November 202590%19
December 202564%22
January 202683%46
February 202671%48
March 202683%52
April 202691%33
May 202693%40
Departures on time
86%
Diverted
0.4%
Flights flown
433
Months covered
12

Keep nerding

Based on 445 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.