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Flight Reliability

AA 12 · American Airlines

Los Angeles → Boston (LAX–BOS)

82
Pretty Reliable
WanderNerd Reliability Score
77%
Arrive within 15 minutes
6 min
Average arrival delay
0.8%
Cancelled
6 min early
Median arrival delay

Based on 365 historical flights. Data through May 2026.

What the data says

The 9 AM–12 PM departure wins.

AA 12 departing between 9 AM–12 PM arrived on time 88% of the time, versus 77% between 6–9 AM.

Friday is doing you no favors.

AA 12 arrived on time 84% of the time on Tuesdays. On Fridays: 71%.

Slipping a little lately.

AA 12 arrived on time 79% of the time over the last three months in the data, compared with 85% in the three months before that.

The breakdown

On-time by weekday
  • Mon73%(51 flights)
  • Tue84%(51 flights)
  • Wed75%(52 flights)
  • Thu77%(52 flights)
  • Fri71%(52 flights)
  • Sat81%(52 flights)
  • Sun79%(52 flights)
On-time by departure window
  • 6–9 AM77%(346 flights)
  • 9 AM–12 PM88%(16 flights)
On-time trend by month
68%
May

Jun 80% → May 68% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202580%30
July 202568%31
August 202577%31
September 202563%30
October 202561%31
November 202583%30
December 202587%31
January 202683%29
February 202685%27
March 202694%31
April 202677%30
May 202668%31
Departures on time
79%
Diverted
0%
Flights flown
362
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.