Skip to content
WanderNerd
Check a flight

Flight Reliability

AA 3423 · American Airlines

Birmingham → Miami (BHM–MIA)

98
Nerd Approved
WanderNerd Reliability Score
92%
Arrive within 15 minutes
2 min early
Average arrival delay
0.3%
Cancelled
7 min early
Median arrival delay

Based on 365 historical flights. Data through May 2026.

What the data says

Skip Monday if you can.

AA 3423 arrived on time 96% of the time on Fridays. On Mondays: 88%.

A bit ahead of the BHM–MIA route.

AA 3423 arrived on time 92% of the time, versus 86% across the BHM–MIA route.

Well ahead of the American Airlines network.

AA 3423 arrived on time 92% of the time, versus 77% across the American Airlines network.

It basically never cancels.

Out of 365 scheduled flights, only 0.3% were cancelled.

The breakdown

On-time by weekday
  • Mon88%(51 flights)
  • Tue92%(52 flights)
  • Wed92%(52 flights)
  • Thu92%(52 flights)
  • Fri96%(52 flights)
  • Sat90%(52 flights)
  • Sun89%(53 flights)
On-time by departure window
  • 3–6 AM93%(15 flights)
  • 6–9 AM91%(349 flights)
On-time trend by month
84%
May

Jun 93% → May 84% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202593%30
July 202577%31
August 2025100%31
September 202593%30
October 202597%31
November 202597%30
December 202590%30
January 202694%31
February 202686%28
March 202694%31
April 202693%30
May 202684%31
Departures on time
93%
Diverted
0%
Flights flown
364
Months covered
12

Same route, other flights

Keep nerding

Based on 365 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.