American Airlines MIA to SEA on-time performance
American Airlines nonstop flights from Miami to Seattle · Aug 2025 – Jul 2026
On-time arrivals
70%
arrived < 15 min late
Cancelled
0.4%
2 flights
Avg arrival delay
17 min
53 min when late
Rank on route
#1 of 3
route average 67% on time
Key facts
- American Airlines flights on MIA to SEA arrived on time 70% of the time in Aug 2025 – Jul 2026.
- 0.4% were cancelled, and 10% arrived an hour or more late.
- That ranks #1 of 3 airlines on this route, which averaged 67% on time overall.
- The largest source of delay minutes was late-arriving aircraft (39%).
On-time trend by month
Why this airline's flights were late
- Late-arriving aircraft39%
- Airline (crew, maintenance, cleaning, fueling)33%
- Air traffic control & airport congestion22%
- Extreme weather3%
- Security2%
Other airlines on MIA to SEA
- Alaska Airlines68% on time · 17 min avg delay
- Delta Air Lines62% on time · 37 min avg delay
Full MIA to SEA comparison →
American Airlines on-time record across all routes →
454 American Airlines flights tracked on this route; 2 cancelled, 2 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.