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Flight Reliability

AA 1259 · American Airlines

Boston → Miami (BOS–MIA)88% of its flights flew this route. The rest (DTW–ORD) are included in these numbers.

84
Pretty Reliable
WanderNerd Reliability Score
89%
Arrive within 15 minutes
5 min early
Average arrival delay
3.4%
Cancelled
15 min early
Median arrival delay

Based on 355 historical flights. Data through May 2026.

What the data says

Sunday scaries are real for this one.

AA 1259 arrived on time 96% of the time on Wednesdays and just 80% on Sundays. That gap is worth planning around.

Better than the BOS–MIA route average.

AA 1259 arrived on time 89% of the time, versus 77% across the BOS–MIA route.

Better than the American Airlines network average.

AA 1259 arrived on time 89% of the time, versus 77% across the American Airlines network.

Keep a backup plan handy.

AA 1259 was cancelled 3.4% of the time. Typical for U.S. flights is around 1–2%.

The breakdown

On-time by weekday
  • Mon86%(50 flights)
  • Tue86%(43 flights)
  • Wed96%(50 flights)
  • Thu96%(50 flights)
  • Fri94%(52 flights)
  • Sat85%(47 flights)
  • Sun80%(51 flights)
On-time trend by month
97%
May

Jun 97% → May 97% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202597%30
July 202583%29
August 202594%31
September 202596%26
October 202581%31
November 202586%29
December 202587%31
January 202680%25
February 202696%25
March 202690%31
April 202684%25
May 202697%30
Departures on time
91%
Diverted
0%
Flights flown
343
Months covered
12

Same route, other flights

Keep nerding

Based on 355 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.