Delta Air Lines ATL to MIA on-time performance
Delta Air Lines nonstop flights from Atlanta to Miami · Aug 2025 – Jul 2026
On-time arrivals
71%
arrived < 15 min late
Cancelled
1.8%
58 flights
Avg arrival delay
17 min
55 min when late
Rank on route
#4 of 6
route average 71% on time
Key facts
- Delta Air Lines flights on ATL to MIA arrived on time 71% of the time in Aug 2025 – Jul 2026.
- 1.8% were cancelled, and 9% arrived an hour or more late.
- That ranks #4 of 6 airlines on this route, which averaged 71% on time overall.
- The largest source of delay minutes was airline (crew, maintenance, cleaning, fueling) (49%).
On-time trend by month
Why this airline's flights were late
- Airline (crew, maintenance, cleaning, fueling)49%
- Air traffic control & airport congestion30%
- Late-arriving aircraft18%
- Extreme weather4%
- Security0%
Other airlines on ATL to MIA
- American Airlines75% on time · 23 min avg delay
- Frontier Airlines64% on time · 35 min avg delay
- Spirit Airlines74% on time · 26 min avg delay
- Envoy Air75% on time · 20 min avg delay
- Republic Airways64% on time · 26 min avg delay
Full ATL to MIA comparison →
Delta Air Lines on-time record across all routes →
3,306 Delta Air Lines flights tracked on this route; 58 cancelled, 13 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.