Airports › Miami (MIA) › September 2025
Airport month · September 2025
Miami International in September 2025
BTS: A flight is counted as on time if it arrived less than 15 minutes after its scheduled time. Only carriers with at least 0.5 percent of domestic scheduled passenger revenue report.
In September 2025, reporting carriers scheduled 7,573 domestic departures from Miami International (MIA). 77.4% left less than 15 minutes late and 78.1% reached their destination on time; 0.4% were cancelled.
Nationally that month, 83.1% of flights departed on time and 82.8% arrived on time, so MIA departures were 5.7 points below the national departure figure.
A year earlier, in September 2024, the airport had 7,603 departures with 81.6% leaving on time: a change of −4.2 points, with flights down 0%.
Flights arriving at MIA that month were on time 80.7% of the time (7,564 scheduled arrivals).
Of the delay minutes that carriers assigned to a BTS cause category that month, late-arriving aircraft 30%, air carrier 28% and extreme weather 23%.
- On time 78.1%
- Arrived 15+ minutes late 21.3%
- Cancelled 0.4%
- Diverted 0.3%
September 2025 against a year earlier, the airport's year and the nation
| Measure | Sep 2025 | Sep 2024 | MIA, 12 months to Jul 2026 | All reported flights, Sep 2025 |
|---|---|---|---|---|
| Departed on time | 77.4% | 81.6% | 72.9% | 83.1% |
| Arrived on time | 78.1% | 79.0% | 72.3% | 82.8% |
| Cancelled | 0.4% | 0.8% | 1.6% | 0.5% |
| Average departure delay (late minutes only) | 16.5 min | 12.4 min | 19.7 min | 12.2 min |
| Scheduled departures a day | 252 | 253 | 305 | 18,748 |
| Scheduled departures | 7,573 | 7,603 | 111,186 | 562,439 |
Airlines that month
| Reporting carrier | Flights | Share | On time | Avg arrival delay | Cancelled |
|---|---|---|---|---|---|
| AA American Airlines | 4,249 | 56% | 75.7% | 7.8 min | 0.6% |
| MQ Envoy Air | 969 | 13% | 84.2% | 1.4 min | 0.0% |
| DL Delta Air Lines | 816 | 11% | 80.8% | 5.1 min | 0.0% |
| UA United Airlines | 410 | 5% | 79.5% | 7.3 min | 0.0% |
| WN Southwest Airlines | 366 | 5% | 81.1% | 3.7 min | 0.0% |
| NK Spirit Airlines | 354 | 5% | 73.2% | 9.5 min | 0.3% |
| F9 Frontier Airlines | 284 | 4% | 84.9% | -1.9 min | 0.0% |
| YX Republic Airline | 91 | 1% | 83.5% | -1.0 min | 0.0% |
| AS Alaska Airlines | 30 | 0% | 73.3% | -1.8 min | 0.0% |
| B6 JetBlue Airways | 4 | 0% | 25.0% | 49.8 min | 0.0% |
Busiest routes that month
| Route | Cities | Flights | On time | Avg arrival delay | Cancelled |
|---|---|---|---|---|---|
| MIA–LGA | Miami to New York | 476 | 79.0% | 3.9 min | 0.2% |
| MIA–ATL | Miami to Atlanta | 419 | 78.0% | 10.1 min | 0.0% |
| MIA–DFW | Miami to Dallas/Fort Worth | 404 | 73.0% | 11.9 min | 3.2% |
| MIA–JFK | Miami to New York | 360 | 84.7% | -3.3 min | 0.3% |
| MIA–MCO | Miami to Orlando | 347 | 78.4% | 5.1 min | 0.3% |
| MIA–DCA | Miami to Washington | 326 | 79.1% | 2.0 min | 0.6% |
| MIA–ORD | Miami to Chicago | 315 | 71.1% | 8.8 min | 0.0% |
| MIA–EWR | Miami to Newark | 282 | 74.5% | 9.3 min | 0.4% |
| MIA–CLT | Miami to Charlotte | 279 | 83.5% | -2.9 min | 0.7% |
| MIA–IAH | Miami to Houston | 276 | 80.8% | 5.6 min | 0.0% |
| MIA–BOS | Miami to Boston | 224 | 64.7% | 16.2 min | 0.0% |
| MIA–PHL | Miami to Philadelphia | 216 | 76.9% | 5.5 min | 0.9% |
By scheduled departure hour
Delay causes
Questions and answers
How many flights left MIA on time in September 2025?
77.4% of 7,573 scheduled domestic departures left less than 15 minutes late, and 78.1% reached their destination on time. The national figures that month were 83.1% and 82.8%.
How does that compare with a year earlier?
In September 2024, 81.6% of 7,603 departures left on time and 0.8% were cancelled, against 77.4% and 0.4% in September 2025.
Provenance
Source: Bureau of Transportation Statistics, Reporting Carrier On-Time Performance, file for September 2025; public domain. Domestic scheduled flights by reporting carriers, totals and averages only. The site's data runs through July 2026. Full record for MIA · methodology · corrections.