Luis Munoz Marin International in April 2024

80.6%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 2,921 domestic departures from Luis Munoz Marin International (SJU). 80.6% left less than 15 minutes late and 78.2% reached their destination on time; 0.9% were cancelled.

Nationally that month, 80.5% of flights departed on time and 80.2% arrived on time, so SJU departures were level with the national departure figure.

Flights arriving at SJU that month were on time 79.2% of the time (2,920 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, late-arriving aircraft 48%, air carrier 37% and national aviation system 15%.

On time 78.2%
Arrived 15+ minutes late 20.3%
Cancelled 0.9%
Diverted 0.5%

Every scheduled departure from SJU 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	SJU, 12 months to Jul 2026	All reported flights, Apr 2024
Departed on time	80.6%	—	74.5%	80.5%
Arrived on time	78.2%	—	75.6%	80.2%
Cancelled	0.9%	—	2.0%	0.7%
Average departure delay (late minutes only)	16.6 min	—	19.6 min	14.2 min
Scheduled departures a day	97	—	97	19,406
Scheduled departures	2,921	—	35,302	582,185

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
B6 JetBlue Airways	763	26%	77.2%	7.7 min	1.3%
NK Spirit Airlines	470	16%	82.6%	4.0 min	1.3%
F9 Frontier Airlines	446	15%	74.0%	12.4 min	1.6%
AA American Airlines	356	12%	71.1%	22.2 min	0.3%
WN Southwest Airlines	336	12%	86.3%	1.7 min	0.0%
DL Delta Air Lines	286	10%	83.9%	1.1 min	0.3%
UA United Airlines	264	9%	73.9%	12.5 min	0.4%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
SJU–MCO	San Juan to Orlando	515	82.3%	2.5 min	0.8%
SJU–JFK	San Juan to New York	296	83.1%	2.2 min	0.7%
SJU–MIA	San Juan to Miami	267	76.0%	12.6 min	0.4%
SJU–BOS	San Juan to Boston	180	77.2%	6.9 min	1.1%
SJU–FLL	San Juan to Fort Lauderdale	179	81.6%	11.2 min	0.0%
SJU–ATL	San Juan to Atlanta	175	83.4%	3.6 min	0.6%
SJU–EWR	San Juan to Newark	159	73.0%	9.2 min	1.9%
SJU–BWI	San Juan to Baltimore	137	86.9%	0.2 min	1.5%
SJU–TPA	San Juan to Tampa	124	82.3%	5.0 min	1.6%
SJU–PHL	San Juan to Philadelphia	113	54.0%	38.0 min	0.9%
SJU–ORD	San Juan to Chicago	106	82.1%	-1.8 min	0.0%
SJU–BDL	San Juan to Hartford	90	68.9%	11.7 min	3.3%

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	37.1%	33.6%	16,740
Late-arriving aircraft	47.5%	41.0%	21,414
National Aviation System	14.9%	20.0%	6,742
Extreme weather	0.5%	5.1%	223
Security	0.0%	0.2%	4

45,123 delay minutes on 594 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 April 2024?

80.6% of 2,921 scheduled domestic departures left less than 15 minutes late, and 78.2% 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 SJU · methodology · corrections.