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Flight Reliability

AA 2539 · American Airlines

Miami → Boston (MIA–BOS)84% of its flights flew this route. The rest (CMH–LAX, LAX–CMH) are included in these numbers.

55
A Little Dicey
WanderNerd Reliability Score
65%
Arrive within 15 minutes
23 min
Average arrival delay
2.6%
Cancelled
0 min
Median arrival delay

Based on 385 historical flights. Data through May 2026.

What the data says

Morning flights do better here.

AA 2539 departing between 9 AM–12 PM arrived on time 86% of the time, versus 63% between 6–9 PM.

Sunday scaries are real for this one.

AA 2539 arrived on time 71% of the time on Wednesdays. On Sundays: 57%.

A bit behind the MIA–BOS route.

AA 2539 arrived on time 65% of the time, versus 70% across the MIA–BOS route.

Lagging the American Airlines network.

AA 2539 arrived on time 65% of the time, versus 77% across the American Airlines network.

The breakdown

On-time by weekday
  • Mon68%(53 flights)
  • Tue69%(52 flights)
  • Wed71%(55 flights)
  • Thu57%(54 flights)
  • Fri64%(55 flights)
  • Sat69%(51 flights)
  • Sun57%(54 flights)
On-time by departure window
  • 9 AM–12 PM86%(29 flights)
  • 6–9 PM63%(345 flights)
On-time trend by month
65%
May

Jun 76% → May 65% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202576%29
July 202563%30
August 202552%31
September 202550%26
October 202570%30
November 202578%55
December 202579%33
January 202663%24
February 202668%25
March 202640%30
April 202663%30
May 202665%31
Departures on time
64%
Diverted
0.3%
Flights flown
374
Months covered
12

Same route, other flights

Keep nerding

Based on 385 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.