Miami International in May 2024

66.8%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 May 2024, reporting carriers scheduled 9,503 domestic departures from Miami International (MIA). 66.8% left less than 15 minutes late and 64.8% reached their destination on time; 1.0% were cancelled.

Nationally that month, 73.4% of flights departed on time and 72.3% arrived on time, so MIA departures were 6.6 points below the national departure figure.

Flights arriving at MIA that month were on time 71.5% of the time (9,499 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, late-arriving aircraft 44%, air carrier 32% and national aviation system 21%.

On time 64.8%
Arrived 15+ minutes late 33.8%
Cancelled 1.0%
Diverted 0.5%

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

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

Measure	May 2024	Year earlier	MIA, 12 months to Jul 2026	All reported flights, May 2024
Departed on time	66.8%	—	72.9%	73.4%
Arrived on time	64.8%	—	72.3%	72.3%
Cancelled	1.0%	—	1.6%	1.4%
Average departure delay (late minutes only)	26.5 min	—	19.7 min	20.8 min
Scheduled departures a day	317	—	305	20,325
Scheduled departures	9,503	—	111,186	609,743

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
AA American Airlines	5,184	55%	60.4%	27.1 min	1.1%
MQ Envoy Air	1,131	12%	67.6%	15.7 min	0.4%
DL Delta Air Lines	985	10%	69.7%	16.9 min	0.2%
WN Southwest Airlines	549	6%	67.9%	22.2 min	0.2%
UA United Airlines	519	5%	73.2%	16.4 min	1.9%
NK Spirit Airlines	517	5%	70.4%	16.3 min	1.7%
F9 Frontier Airlines	354	4%	74.3%	7.6 min	1.7%
B6 JetBlue Airways	182	2%	74.2%	11.5 min	1.1%
YX Republic Airline	51	1%	70.6%	5.5 min	0.0%
AS Alaska Airlines	31	0%	71.0%	19.9 min	0.0%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
MIA–ATL	Miami to Atlanta	589	66.2%	19.2 min	0.7%
MIA–JFK	Miami to New York	468	67.5%	21.1 min	0.9%
MIA–LGA	Miami to New York	461	65.5%	20.4 min	0.9%
MIA–DFW	Miami to Dallas/Fort Worth	445	56.6%	33.5 min	4.5%
MIA–ORD	Miami to Chicago	368	64.7%	20.3 min	0.5%
MIA–EWR	Miami to Newark	367	70.6%	13.8 min	1.9%
MIA–LAX	Miami to Los Angeles	337	65.3%	26.2 min	0.3%
MIA–DCA	Miami to Washington	332	63.6%	17.3 min	0.9%
MIA–MCO	Miami to Orlando	326	63.5%	20.8 min	0.3%
MIA–CLT	Miami to Charlotte	309	64.4%	25.6 min	1.0%
MIA–BOS	Miami to Boston	300	67.3%	17.8 min	0.3%
MIA–IAH	Miami to Houston	300	53.7%	43.0 min	3.0%

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), May 2024.

Delay causes

BTS cause category	Share of delay minutes	National, May 2024	Minutes
Air carrier	32.2%	29.8%	80,218
Late-arriving aircraft	43.8%	43.0%	109,182
National Aviation System	20.7%	20.1%	51,650
Extreme weather	3.0%	7.0%	7,519
Security	0.3%	0.1%	853

249,422 delay minutes on 3,210 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 May 2024?

66.8% of 9,503 scheduled domestic departures left less than 15 minutes late, and 64.8% reached their destination on time. The national figures that month were 73.4% and 72.3%.

How does that compare with a year earlier?

May 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 May 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.