Luis Munoz Marin International in April 2026

79.8%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 April 2026, reporting carriers scheduled 3,190 domestic departures from Luis Munoz Marin International (SJU). 79.8% left less than 15 minutes late and 77.5% reached their destination on time; 0.8% were cancelled.

Nationally that month, 79.1% of flights departed on time and 78.9% arrived on time, so SJU departures were 0.7 points above the national departure figure.

A year earlier, in April 2025, the airport had 3,121 departures with 81.0% leaving on time: a change of −1.2 points, with flights up 2%.

Flights arriving at SJU that month were on time 74.6% of the time (3,187 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, late-arriving aircraft 48%, air carrier 34% and national aviation system 18%.

On time 77.5%
Arrived 15+ minutes late 21.4%
Cancelled 0.8%
Diverted 0.3%

Every scheduled departure from SJU in April 2026, judged by arrival at the destination.

April 2026 against a year earlier, the airport's year and the nation

Measure	Apr 2026	Apr 2025	SJU, 12 months to Jul 2026	All reported flights, Apr 2026
Departed on time	79.8%	81.0%	74.5%	79.1%
Arrived on time	77.5%	82.2%	75.6%	78.9%
Cancelled	0.8%	0.4%	2.0%	0.9%
Average departure delay (late minutes only)	15.4 min	16.0 min	19.6 min	14.5 min
Scheduled departures a day	106	104	97	19,931
Scheduled departures	3,190	3,121	35,302	597,919

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
B6 JetBlue Airways	1,027	32%	78.0%	5.6 min	0.2%
AA American Airlines	484	15%	81.2%	5.8 min	0.2%
F9 Frontier Airlines	434	14%	70.3%	21.6 min	1.2%
NK Spirit Airlines	329	10%	61.7%	16.9 min	4.3%
DL Delta Air Lines	318	10%	87.1%	-5.9 min	0.3%
UA United Airlines	300	9%	88.0%	-4.4 min	0.3%
WN Southwest Airlines	298	9%	77.2%	7.8 min	0.0%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
SJU–MCO	San Juan to Orlando	480	78.5%	13.5 min	0.8%
SJU–JFK	San Juan to New York	310	83.9%	-1.1 min	0.0%
SJU–MIA	San Juan to Miami	238	73.9%	17.6 min	0.0%
SJU–PHL	San Juan to Philadelphia	224	78.1%	8.7 min	3.1%
SJU–BOS	San Juan to Boston	215	69.8%	7.2 min	0.0%
SJU–ATL	San Juan to Atlanta	201	74.1%	2.1 min	0.0%
SJU–EWR	San Juan to Newark	191	80.1%	6.3 min	0.5%
SJU–FLL	San Juan to Fort Lauderdale	180	68.3%	13.0 min	1.7%
SJU–ORD	San Juan to Chicago	138	81.2%	1.5 min	1.4%
SJU–TPA	San Juan to Tampa	123	63.4%	15.3 min	2.4%
SJU–BWI	San Juan to Baltimore	111	67.6%	15.7 min	0.9%
SJU–CLT	San Juan to Charlotte	108	83.3%	6.4 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 2026.

Delay causes

BTS cause category	Share of delay minutes	National, Apr 2026	Minutes
Air carrier	34.1%	33.5%	15,795
Late-arriving aircraft	47.5%	40.4%	21,997
National Aviation System	17.7%	21.0%	8,203
Extreme weather	0.7%	5.0%	310
Security	0.0%	0.1%	0

46,305 delay minutes on 683 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 2026?

79.8% of 3,190 scheduled domestic departures left less than 15 minutes late, and 77.5% reached their destination on time. The national figures that month were 79.1% and 78.9%.

How does that compare with a year earlier?

In April 2025, 81.0% of 3,121 departures left on time and 0.4% were cancelled, against 79.8% and 0.8% in April 2026.

Provenance

Source: Bureau of Transportation Statistics, Reporting Carrier On-Time Performance, file for April 2026; 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.