FlightRecord

Miami International Airport (MIA): Delays & On-Time Performance

Data through May 2026

Miami International Airport (MIA) is a tale of two seasons: departures ran 85% on-time in October 2024 but sank to 63% in June 2024. Across the year it averages 74% against a national 78%, over roughly 304 departures a day to 99 destinations.

Departures on-time
74%
left <15 min late
Avg dep delay
20 min
Arrivals on-time
77%
Cancelled
1.7%
Destinations
99
nonstop
Airlines
11

Monthly on-time trend

Monthly departure on-time percentage at MIA50%75%100%June 2024: 63% on-time (8,553 flights)63Jun 2024July 2024: 64% on-time (8,733 flights)64August 2024: 63% on-time (8,459 flights)63September 2024: 82% on-time (7,603 flights)82Sep 2024October 2024: 85% on-time (8,299 flights)85November 2024: 84% on-time (8,972 flights)84December 2024: 74% on-time (9,937 flights)74Dec 2024January 2025: 78% on-time (10,182 flights)78February 2025: 78% on-time (9,447 flights)78March 2025: 75% on-time (10,920 flights)75Mar 2025April 2025: 77% on-time (9,878 flights)77May 2025: 75% on-time (9,440 flights)75June 2025: 70% on-time (8,831 flights)70Jun 2025July 2025: 65% on-time (9,079 flights)65August 2025: 69% on-time (8,731 flights)69September 2025: 78% on-time (7,573 flights)78Sep 2025October 2025: 79% on-time (8,457 flights)79November 2025: 77% on-time (9,270 flights)77December 2025: 74% on-time (10,099 flights)74Dec 2025January 2026: 74% on-time (10,439 flights)74February 2026: 77% on-time (9,304 flights)77March 2026: 69% on-time (10,460 flights)69Mar 2026April 2026: 77% on-time (9,556 flights)77May 2026: 76% on-time (9,296 flights)76

Best time of day to depart from MIA

On-time percentage by scheduled departure hour at MIA5 a.m.: 90% on-time (2,349 flights)56 a.m.: 92% on-time (9,630 flights)67 a.m.: 91% on-time (13,541 flights)78 a.m.: 89% on-time (18,531 flights)89 a.m.: 84% on-time (9,792 flights)910 a.m.: 82% on-time (6,520 flights)1011 a.m.: 76% on-time (8,119 flights)1112 p.m.: 76% on-time (9,720 flights)121 p.m.: 73% on-time (10,141 flights)132 p.m.: 71% on-time (11,770 flights)143 p.m.: 69% on-time (13,792 flights)154 p.m.: 71% on-time (12,596 flights)165 p.m.: 67% on-time (15,375 flights)176 p.m.: 66% on-time (13,285 flights)187 p.m.: 66% on-time (19,475 flights)198 p.m.: 67% on-time (13,715 flights)209 p.m.: 68% on-time (21,660 flights)2110 p.m.: 69% on-time (10,957 flights)2211 p.m.: 68% on-time (484 flights)23scheduled departure hour

Busiest routes from MIA

RouteFlights/12moOn-timeAvg delay
MIA → ATL6,24073%24 min
MIA → LGA6,03670%23 min
MIA → DFW4,83673%22 min
MIA → JFK4,60872%23 min
MIA → ORD4,45174%19 min
MIA → EWR3,97771%25 min
MIA → DCA3,96274%18 min
MIA → MCO3,84172%24 min

Most reliable routes

  1. MIA → SRQ88%
  2. MIA → VPS86%
  3. MIA → EYW85%
  4. MIA → PNS84%
  5. MIA → TLH84%

Most delay-prone routes

  1. MIA → MEM61%
  2. MIA → EGE62%
  3. MIA → SEA67%
  4. MIA → AVL67%
  5. MIA → TUL68%

Airline performance at MIA

AirlineOn-time departuresAvg delayFlights
Envoy Air86%8 min27,719
United Airlines79%19 min13,205
Frontier Airlines77%22 min8,209
Republic Airways76%26 min1,968
Spirit Airlines73%22 min8,650
Delta Air Lines73%24 min22,875
Alaska Airlines73%18 min1,076
Southwest Airlines72%18 min10,511
American Airlines72%22 min125,539
JetBlue Airways69%29 min1,758

Frequently asked questions

How often are flights delayed at MIA?
26% of departures from Miami International Airport left 15+ minutes late between 2024-06 and 2026-05, 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, June 2024 was the weakest month at MIA, with 63% of departures on time.
How often are flights cancelled at MIA?
1.7% of scheduled departures from MIA were cancelled in this period, compared with a national rate of 1.6%.

Popular route pages from this airport

Based on 221,518 flights, 2024-06–2026-05. Source: US DOT Bureau of Transportation Statistics. Updated 2026-07-01.