Luis Munoz Marin International in July 2026

66.9%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 July 2026, reporting carriers scheduled 3,326 domestic departures from Luis Munoz Marin International (SJU). 66.9% left less than 15 minutes late and 68.6% reached their destination on time; 3.3% were cancelled.

Nationally that month, 68.8% of flights departed on time and 69.4% arrived on time, so SJU departures were 1.9 points below the national departure figure.

A year earlier, in July 2025, the airport had 3,415 departures with 72.8% leaving on time: a change of −5.9 points, with flights down 3%.

Flights arriving at SJU that month were on time 61.4% of the time (3,325 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, late-arriving aircraft 58%, air carrier 33% and national aviation system 8%.

On time 68.6%
Arrived 15+ minutes late 27.3%
Cancelled 3.3%
Diverted 0.8%

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

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

Measure	Jul 2026	Jul 2025	SJU, 12 months to Jul 2026	All reported flights, Jul 2026
Departed on time	66.9%	72.8%	74.5%	68.8%
Arrived on time	68.6%	73.8%	75.6%	69.4%
Cancelled	3.3%	1.6%	2.0%	2.6%
Average departure delay (late minutes only)	26.7 min	22.0 min	19.6 min	24.1 min
Scheduled departures a day	111	114	97	21,066
Scheduled departures	3,326	3,415	35,302	631,970

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
B6 JetBlue Airways	1,278	38%	59.3%	28.2 min	6.2%
F9 Frontier Airlines	552	17%	62.1%	20.9 min	3.8%
WN Southwest Airlines	452	14%	71.9%	11.4 min	0.0%
AA American Airlines	402	12%	80.1%	1.6 min	1.0%
UA United Airlines	341	10%	82.4%	7.1 min	0.6%
DL Delta Air Lines	301	9%	84.4%	-1.6 min	1.0%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
SJU–MCO	San Juan to Orlando	647	67.2%	19.3 min	1.7%
SJU–JFK	San Juan to New York	310	51.9%	40.3 min	9.7%
SJU–FLL	San Juan to Fort Lauderdale	217	71.9%	16.2 min	1.4%
SJU–MIA	San Juan to Miami	217	77.0%	6.2 min	0.9%
SJU–TPA	San Juan to Tampa	186	65.6%	17.9 min	2.7%
SJU–PHL	San Juan to Philadelphia	185	63.8%	26.3 min	3.8%
SJU–EWR	San Juan to Newark	183	59.0%	47.4 min	4.9%
SJU–ATL	San Juan to Atlanta	176	78.4%	3.8 min	1.1%
SJU–BOS	San Juan to Boston	139	58.3%	22.2 min	7.9%
SJU–ORD	San Juan to Chicago	123	72.4%	9.0 min	2.4%
SJU–BWI	San Juan to Baltimore	120	81.7%	-0.2 min	1.7%
SJU–BDL	San Juan to Hartford	93	51.6%	24.4 min	6.5%

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), July 2026.

Delay causes

BTS cause category	Share of delay minutes	National, Jul 2026	Minutes
Air carrier	32.7%	31.7%	24,871
Late-arriving aircraft	57.5%	41.8%	43,760
National Aviation System	8.3%	19.9%	6,335
Extreme weather	1.5%	6.5%	1,154
Security	0.0%	0.1%	12

76,132 delay minutes on 909 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 July 2026?

66.9% of 3,326 scheduled domestic departures left less than 15 minutes late, and 68.6% reached their destination on time. The national figures that month were 68.8% and 69.4%.

How does that compare with a year earlier?

In July 2025, 72.8% of 3,415 departures left on time and 1.6% were cancelled, against 66.9% and 3.3% in July 2026.

Provenance

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