Luis Munoz Marin International in September 2023

76.0%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 September 2023, reporting carriers scheduled 2,192 domestic departures from Luis Munoz Marin International (SJU). 76.0% left less than 15 minutes late and 75.3% reached their destination on time; 0.8% were cancelled.

Nationally that month, 80.5% of flights departed on time and 80.1% arrived on time, so SJU departures were 4.5 points below the national departure figure.

Flights arriving at SJU that month were on time 72.3% of the time (2,183 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, late-arriving aircraft 53%, air carrier 32% and national aviation system 15%.

On time 75.3%
Arrived 15+ minutes late 23.3%
Cancelled 0.8%
Diverted 0.6%

Every scheduled departure from SJU in September 2023, judged by arrival at the destination.

September 2023 against a year earlier, the airport's year and the nation

Measure	Sep 2023	Year earlier	SJU, 12 months to Jul 2026	All reported flights, Sep 2023
Departed on time	76.0%	—	74.5%	80.5%
Arrived on time	75.3%	—	75.6%	80.1%
Cancelled	0.8%	—	2.0%	1.2%
Average departure delay (late minutes only)	21.3 min	—	19.6 min	14.1 min
Scheduled departures a day	73	—	97	18,978
Scheduled departures	2,192	—	35,302	569,338

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
B6 JetBlue Airways	647	30%	61.4%	28.5 min	1.2%
NK Spirit Airlines	401	18%	79.1%	2.3 min	0.2%
F9 Frontier Airlines	286	13%	66.1%	27.2 min	1.7%
AA American Airlines	248	11%	87.5%	2.7 min	0.0%
DL Delta Air Lines	244	11%	90.2%	-7.5 min	0.4%
WN Southwest Airlines	199	9%	89.4%	-1.2 min	0.0%
UA United Airlines	167	8%	79.0%	5.6 min	1.8%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
SJU–MCO	San Juan to Orlando	462	71.6%	16.0 min	0.2%
SJU–JFK	San Juan to New York	207	69.6%	14.5 min	1.4%
SJU–MIA	San Juan to Miami	187	82.9%	6.2 min	0.5%
SJU–FLL	San Juan to Fort Lauderdale	181	73.5%	10.4 min	0.6%
SJU–EWR	San Juan to Newark	159	74.8%	15.6 min	1.9%
SJU–ATL	San Juan to Atlanta	132	88.6%	-5.9 min	0.0%
SJU–BOS	San Juan to Boston	119	74.8%	5.7 min	2.5%
SJU–TPA	San Juan to Tampa	103	75.7%	10.5 min	1.0%
SJU–BWI	San Juan to Baltimore	89	83.1%	-3.8 min	0.0%
SJU–PHL	San Juan to Philadelphia	89	62.9%	56.4 min	2.2%
SJU–BDL	San Juan to Hartford	82	62.2%	27.8 min	2.4%
SJU–CLT	San Juan to Charlotte	60	91.7%	-8.5 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), September 2023.

Delay causes

BTS cause category	Share of delay minutes	National, Sep 2023	Minutes
Air carrier	31.6%	36.4%	13,753
Late-arriving aircraft	53.0%	38.3%	23,077
National Aviation System	15.1%	19.9%	6,576
Extreme weather	0.3%	5.1%	133
Security	0.1%	0.2%	41

43,580 delay minutes on 510 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 September 2023?

76.0% of 2,192 scheduled domestic departures left less than 15 minutes late, and 75.3% reached their destination on time. The national figures that month were 80.5% and 80.1%.

How does that compare with a year earlier?

September 2022 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 September 2023; 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.