Luis Munoz Marin International in May 2024

75.1%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 3,104 domestic departures from Luis Munoz Marin International (SJU). 75.1% left less than 15 minutes late and 71.7% reached their destination on time; 0.9% were cancelled.

Nationally that month, 73.4% of flights departed on time and 72.3% arrived on time, so SJU departures were 1.7 points above the national departure figure.

Flights arriving at SJU that month were on time 72.8% of the time (3,105 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, late-arriving aircraft 44%, air carrier 38% and national aviation system 17%.

On time 71.7%
Arrived 15+ minutes late 26.3%
Cancelled 0.9%
Diverted 1.1%

Every scheduled departure from SJU 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	SJU, 12 months to Jul 2026	All reported flights, May 2024
Departed on time	75.1%	—	74.5%	73.4%
Arrived on time	71.7%	—	75.6%	72.3%
Cancelled	0.9%	—	2.0%	1.4%
Average departure delay (late minutes only)	24.7 min	—	19.6 min	20.8 min
Scheduled departures a day	104	—	97	20,325
Scheduled departures	3,104	—	35,302	609,743

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
B6 JetBlue Airways	823	27%	78.4%	6.3 min	0.2%
F9 Frontier Airlines	508	16%	60.4%	24.2 min	3.0%
NK Spirit Airlines	468	15%	76.9%	10.3 min	1.3%
AA American Airlines	398	13%	63.6%	43.2 min	0.3%
WN Southwest Airlines	339	11%	78.5%	6.4 min	0.0%
DL Delta Air Lines	307	10%	73.3%	14.4 min	0.3%
UA United Airlines	261	8%	64.8%	21.9 min	1.5%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
SJU–MCO	San Juan to Orlando	560	77.7%	12.0 min	0.2%
SJU–MIA	San Juan to Miami	279	74.9%	17.0 min	0.4%
SJU–JFK	San Juan to New York	278	88.5%	-6.4 min	0.4%
SJU–FLL	San Juan to Fort Lauderdale	221	75.1%	8.1 min	0.0%
SJU–ATL	San Juan to Atlanta	200	64.0%	20.8 min	0.5%
SJU–EWR	San Juan to Newark	186	76.3%	6.3 min	1.1%
SJU–BOS	San Juan to Boston	171	77.2%	9.1 min	1.2%
SJU–TPA	San Juan to Tampa	131	79.4%	9.4 min	0.0%
SJU–PHL	San Juan to Philadelphia	129	36.4%	47.1 min	3.1%
SJU–BWI	San Juan to Baltimore	122	70.5%	14.5 min	0.8%
SJU–DFW	San Juan to Dallas/Fort Worth	102	52.9%	21.9 min	3.9%
SJU–CLT	San Juan to Charlotte	94	64.9%	81.7 min	0.0%

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	38.0%	29.8%	27,570
Late-arriving aircraft	43.8%	43.0%	31,807
National Aviation System	16.9%	20.1%	12,238
Extreme weather	1.3%	7.0%	964
Security	0.0%	0.1%	22

72,601 delay minutes on 816 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 SJU on time in May 2024?

75.1% of 3,104 scheduled domestic departures left less than 15 minutes late, and 71.7% 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 SJU · methodology · corrections.