Miami International in April 2024

77.0%departed on time

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 April 2024, reporting carriers scheduled 9,590 domestic departures from Miami International (MIA). 77.0% left less than 15 minutes late and 76.5% reached their destination on time; 0.8% were cancelled.

Nationally that month, 80.5% of flights departed on time and 80.2% arrived on time, so MIA departures were 3.5 points below the national departure figure.

Flights arriving at MIA that month were on time 80.8% of the time (9,586 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, late-arriving aircraft 42%, air carrier 36% and national aviation system 18%.

On time 76.5%
Arrived 15+ minutes late 22.4%
Cancelled 0.8%
Diverted 0.3%

Every scheduled departure from MIA in April 2024, judged by arrival at the destination.

April 2024 against a year earlier, the airport's year and the nation

Measure	Apr 2024	Year earlier	MIA, 12 months to Jul 2026	All reported flights, Apr 2024
Departed on time	77.0%	—	72.9%	80.5%
Arrived on time	76.5%	—	72.3%	80.2%
Cancelled	0.8%	—	1.6%	0.7%
Average departure delay (late minutes only)	17.8 min	—	19.7 min	14.2 min
Scheduled departures a day	320	—	305	19,406
Scheduled departures	9,590	—	111,186	582,185

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
AA American Airlines	4,962	52%	73.5%	13.0 min	0.7%
MQ Envoy Air	1,160	12%	86.3%	-0.5 min	0.4%
DL Delta Air Lines	997	10%	74.5%	14.5 min	0.7%
UA United Airlines	614	6%	76.7%	8.9 min	1.3%
NK Spirit Airlines	594	6%	84.0%	0.8 min	0.8%
WN Southwest Airlines	570	6%	79.5%	8.6 min	1.1%
F9 Frontier Airlines	352	4%	78.7%	11.4 min	2.3%
B6 JetBlue Airways	244	3%	68.4%	20.7 min	1.6%
YX Republic Airline	52	1%	88.5%	-10.2 min	0.0%
AS Alaska Airlines	45	0%	73.3%	9.8 min	0.0%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
MIA–ATL	Miami to Atlanta	591	71.9%	17.8 min	0.0%
MIA–JFK	Miami to New York	497	72.8%	13.5 min	1.4%
MIA–LGA	Miami to New York	484	76.4%	5.2 min	2.1%
MIA–EWR	Miami to Newark	408	76.5%	5.1 min	2.5%
MIA–ORD	Miami to Chicago	383	79.9%	3.4 min	0.0%
MIA–DFW	Miami to Dallas/Fort Worth	371	67.7%	15.2 min	3.0%
MIA–BOS	Miami to Boston	356	68.5%	16.4 min	0.8%
MIA–LAX	Miami to Los Angeles	329	75.1%	9.8 min	0.6%
MIA–DCA	Miami to Washington	325	74.2%	10.7 min	0.6%
MIA–MCO	Miami to Orlando	299	80.3%	9.8 min	0.7%
MIA–CLT	Miami to Charlotte	291	74.9%	16.2 min	0.0%
MIA–PHL	Miami to Philadelphia	284	78.9%	11.0 min	1.8%

By scheduled departure hour

On-time share:under 62%6270768288% and over

Share of departures that left less than 15 minutes late, by scheduled hour (local time), April 2024.

Delay causes

BTS cause category	Share of delay minutes	National, Apr 2024	Minutes
Air carrier	36.3%	33.6%	57,211
Late-arriving aircraft	42.2%	41.0%	66,472
National Aviation System	17.6%	20.0%	27,765
Extreme weather	3.6%	5.1%	5,642
Security	0.3%	0.2%	542

157,632 delay minutes on 2,149 flights that arrived 15 or more minutes late and carried a cause report. Carriers assign the categories; see what each category means.

Questions and answers

How many flights left MIA on time in April 2024?

77.0% of 9,590 scheduled domestic departures left less than 15 minutes late, and 76.5% reached their destination on time. The national figures that month were 80.5% and 80.2%.

How does that compare with a year earlier?

April 2023 is outside the 36 months on file, or the airport had too few reported flights that month.

Provenance

Source: Bureau of Transportation Statistics, Reporting Carrier On-Time Performance, file for April 2024; 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.