Luis Munoz Marin International in April 2025

81.0%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 2025, reporting carriers scheduled 3,121 domestic departures from Luis Munoz Marin International (SJU). 81.0% left less than 15 minutes late and 82.2% reached their destination on time; 0.4% were cancelled.

Nationally that month, 80.6% of flights departed on time and 79.5% arrived on time, so SJU departures were level with the national departure figure.

A year earlier, in April 2024, the airport had 2,921 departures with 80.6% leaving on time: a change of +0.4 points, with flights up 7%.

Flights arriving at SJU that month were on time 77.7% of the time (3,120 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, late-arriving aircraft 47%, air carrier 38% and national aviation system 13%.

On time 82.2%
Arrived 15+ minutes late 17.0%
Cancelled 0.4%
Diverted 0.4%

Every scheduled departure from SJU in April 2025, judged by arrival at the destination.

April 2025 against a year earlier, the airport's year and the nation

Measure	Apr 2025	Apr 2024	SJU, 12 months to Jul 2026	All reported flights, Apr 2025
Departed on time	81.0%	80.6%	74.5%	80.6%
Arrived on time	82.2%	78.2%	75.6%	79.5%
Cancelled	0.4%	0.9%	2.0%	0.8%
Average departure delay (late minutes only)	16.0 min	16.6 min	19.6 min	14.1 min
Scheduled departures a day	104	97	97	19,465
Scheduled departures	3,121	2,921	35,302	583,950

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
B6 JetBlue Airways	906	29%	83.3%	2.8 min	0.4%
F9 Frontier Airlines	528	17%	70.6%	19.3 min	1.5%
AA American Airlines	396	13%	81.1%	-0.5 min	0.0%
NK Spirit Airlines	366	12%	84.2%	-0.8 min	0.3%
WN Southwest Airlines	324	10%	88.3%	-3.2 min	0.0%
DL Delta Air Lines	323	10%	92.0%	-13.3 min	0.0%
UA United Airlines	278	9%	80.6%	11.1 min	0.4%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
SJU–MCO	San Juan to Orlando	475	84.6%	4.9 min	0.8%
SJU–JFK	San Juan to New York	370	86.2%	-3.3 min	0.5%
SJU–MIA	San Juan to Miami	222	79.3%	1.6 min	0.0%
SJU–BOS	San Juan to Boston	213	81.7%	1.2 min	0.0%
SJU–EWR	San Juan to Newark	206	72.3%	20.3 min	1.5%
SJU–ATL	San Juan to Atlanta	200	86.0%	-5.5 min	0.0%
SJU–PHL	San Juan to Philadelphia	165	84.8%	13.0 min	0.0%
SJU–FLL	San Juan to Fort Lauderdale	161	77.0%	8.1 min	0.6%
SJU–BWI	San Juan to Baltimore	143	79.7%	1.3 min	0.0%
SJU–ORD	San Juan to Chicago	128	83.6%	-1.4 min	0.8%
SJU–TPA	San Juan to Tampa	111	86.5%	-0.4 min	0.0%
SJU–CLT	San Juan to Charlotte	93	81.7%	-3.5 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), April 2025.

Delay causes

BTS cause category	Share of delay minutes	National, Apr 2025	Minutes
Air carrier	38.3%	32.7%	16,693
Late-arriving aircraft	47.1%	39.4%	20,557
National Aviation System	13.3%	22.2%	5,808
Extreme weather	1.2%	5.5%	538
Security	0.0%	0.2%	15

43,611 delay minutes on 531 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 2025?

81.0% of 3,121 scheduled domestic departures left less than 15 minutes late, and 82.2% reached their destination on time. The national figures that month were 80.6% and 79.5%.

How does that compare with a year earlier?

In April 2024, 80.6% of 2,921 departures left on time and 0.9% were cancelled, against 81.0% and 0.4% in April 2025.

Provenance

Source: Bureau of Transportation Statistics, Reporting Carrier On-Time Performance, file for April 2025; 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.