Miami International Airport (MIA): Delays & On-Time Performance
Data through July 2026
Miami International Airport (MIA) is a tale of two seasons: departures ran 85% on-time in October 2024 but sank to 63% in August 2024. Across the year it averages 74% against a national 78%, over roughly 305 departures a day to 99 destinations.
- Departures on-time
- 74%
- left <15 min late
- Avg dep delay
- 20 min
- Arrivals on-time
- 77%
- Cancelled
- 1.5%
- Destinations
- 99
- nonstop
- Airlines
- 11
Plan your departure from MIA
The choices most likely to improve your odds, based on this airport’s historical record.
- Best departure time
- Around 6 a.m.
- 92% on-time
- Best day to fly
- Tuesday
- 79% on-time
- Cancellation risk
- 1.5%
- close to the US average
Monthly on-time trend
Best time of day to depart from MIA
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 73% | 23 min |
| Tuesdaybest | 79% | 15 min |
| Wednesday | 78% | 16 min |
| Thursday | 74% | 20 min |
| Friday | 73% | 20 min |
| Saturday | 73% | 21 min |
| Sunday | 67% | 26 min |
Busiest routes from MIA
Where flights into MIA come from
| Route | Flights/12mo | On-time | Avg delay |
|---|---|---|---|
| ATL (Atlanta) → MIA | 6,268 | 72% | 22 min |
| LGA (New York) → MIA | 5,986 | 73% | 25 min |
| DFW (Dallas/Fort Worth) → MIA | 4,822 | 69% | 24 min |
| JFK (New York) → MIA | 4,529 | 75% | 22 min |
| ORD (Chicago) → MIA | 4,452 | 76% | 17 min |
| DCA (Washington) → MIA | 3,955 | 77% | 20 min |
| EWR (Newark) → MIA | 3,952 | 76% | 20 min |
| MCO (Orlando) → MIA | 3,765 | 77% | 20 min |
What causes delays at MIA
Share of total delay minutes by cause, as reported by carriers to the US DOT, weighted across routes departing MIA.
- Late-arriving aircraft40%
- Airline operations32%
- National airspace system21%
- Weather6%
Alternative airports near Miami
Other airports within 120 miles, compared on departure reliability.
| Airport | Distance | On-time departures | Avg delay |
|---|---|---|---|
| FLL — Fort Lauderdale Hollywood International Airport | 21 mi | 73% | 20 min |
| RSW — Southwest Florida International Airport | 104 mi | 79% | 18 min |
Compare the airport-level record first, then check the exact route you plan to book.
Airline performance at MIA
| Airline | On-time departures | Avg delay | Flights |
|---|---|---|---|
| Envoy Air | 86% | 8 min | 29,142 |
| United Airlines | 79% | 19 min | 13,797 |
| Frontier Airlines | 77% | 22 min | 8,594 |
| Republic Airways | 75% | 27 min | 2,068 |
| Delta Air Lines | 74% | 23 min | 23,791 |
| Alaska Airlines | 73% | 17 min | 1,107 |
| Spirit Airlines | 73% | 22 min | 8,196 |
| American Airlines | 72% | 22 min | 131,706 |
| Southwest Airlines | 71% | 19 min | 10,923 |
| JetBlue Airways | 68% | 29 min | 1,634 |
Frequently asked questions
- How often are flights delayed at MIA?
- 26% of departures from Miami International Airport left 15+ minutes late between 2024-07 and 2026-07, with an average departure delay of 20 minutes. The national on-time average over the same period was 78%.
- What is the best time of day to depart from MIA?
- Flights scheduled around 6 a.m. depart on time 92% of the time at MIA, versus 66% around 7 p.m.. Booking before noon is the usual rule of thumb here.
- What is the worst month for delays at MIA?
- In this dataset, August 2024 was the weakest month at MIA, with 63% of departures on time.
- How often are flights cancelled at MIA?
- 1.5% of scheduled departures from MIA were cancelled in this period, compared with a national rate of 1.6%.
Popular route pages from this airport
Related guides
Based on 230,966 flights, 2024-07–2026-07. Source: US DOT Bureau of Transportation Statistics. Updated 2026-09-28.