American Airlines BOS to MIA on-time performance
American Airlines nonstop flights from Boston to Miami · Aug 2025 – Jul 2026
On-time arrivals
83%
arrived < 15 min late
Cancelled
1.7%
38 flights
Avg arrival delay
13 min
73 min when late
Rank on route
#1 of 5
route average 78% on time
Key facts
- American Airlines flights on BOS to MIA arrived on time 83% of the time in Aug 2025 – Jul 2026.
- 1.7% were cancelled, and 6% arrived an hour or more late.
- That ranks #1 of 5 airlines on this route, which averaged 78% on time overall.
- The largest source of delay minutes was airline (crew, maintenance, cleaning, fueling) (36%).
On-time trend by month
Why this airline's flights were late
- Airline (crew, maintenance, cleaning, fueling)36%
- Late-arriving aircraft35%
- Air traffic control & airport congestion25%
- Extreme weather4%
- Security0%
Other airlines on BOS to MIA
- Delta Air Lines73% on time · 22 min avg delay
- Spirit Airlines55% on time · 38 min avg delay
- JetBlue80% on time · 7 min avg delay
- Republic Airways48% on time · 26 min avg delay
Full BOS to MIA comparison →
American Airlines on-time record across all routes →
2,252 American Airlines flights tracked on this route; 38 cancelled, 5 diverted.
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. How we calculate this.