Luis Munoz Marin International in August 2023

65.9%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 August 2023, reporting carriers scheduled 3,058 domestic departures from Luis Munoz Marin International (SJU). 65.9% left less than 15 minutes late and 65.4% reached their destination on time; 1.9% were cancelled.

Nationally that month, 76.7% of flights departed on time and 76.9% arrived on time, so SJU departures were 10.8 points below the national departure figure.

Flights arriving at SJU that month were on time 60.0% of the time (3,055 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, late-arriving aircraft 45%, air carrier 42% and national aviation system 12%.

On time 65.4%
Arrived 15+ minutes late 32.1%
Cancelled 1.9%
Diverted 0.6%

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

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

Measure	Aug 2023	Year earlier	SJU, 12 months to Jul 2026	All reported flights, Aug 2023
Departed on time	65.9%	—	74.5%	76.7%
Arrived on time	65.4%	—	75.6%	76.9%
Cancelled	1.9%	—	2.0%	1.5%
Average departure delay (late minutes only)	31.6 min	—	19.6 min	17.3 min
Scheduled departures a day	102	—	97	20,100
Scheduled departures	3,058	—	35,302	602,987

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
B6 JetBlue Airways	884	29%	52.3%	43.0 min	2.9%
NK Spirit Airlines	580	19%	60.2%	30.7 min	1.7%
F9 Frontier Airlines	463	15%	59.8%	31.9 min	3.2%
WN Southwest Airlines	335	11%	80.6%	4.0 min	1.2%
AA American Airlines	293	10%	80.5%	13.4 min	0.7%
DL Delta Air Lines	272	9%	80.9%	0.6 min	0.0%
UA United Airlines	229	7%	81.2%	2.8 min	0.0%
MQ Envoy Air	2	0%	50.0%	6.0 min	0.0%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
SJU–MCO	San Juan to Orlando	603	62.0%	30.2 min	2.0%
SJU–JFK	San Juan to New York	297	66.7%	33.4 min	2.4%
SJU–MIA	San Juan to Miami	233	74.2%	16.0 min	0.4%
SJU–EWR	San Juan to Newark	217	60.8%	30.8 min	0.0%
SJU–FLL	San Juan to Fort Lauderdale	200	57.0%	27.5 min	1.5%
SJU–BOS	San Juan to Boston	181	50.3%	43.4 min	1.7%
SJU–ATL	San Juan to Atlanta	177	73.4%	6.4 min	0.0%
SJU–BWI	San Juan to Baltimore	159	71.7%	13.4 min	1.3%
SJU–TPA	San Juan to Tampa	154	57.1%	26.2 min	9.7%
SJU–PHL	San Juan to Philadelphia	124	65.3%	68.3 min	3.2%
SJU–BDL	San Juan to Hartford	107	56.1%	24.8 min	0.9%
SJU–DFW	San Juan to Dallas/Fort Worth	95	84.2%	-7.2 min	2.1%

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), August 2023.

Delay causes

BTS cause category	Share of delay minutes	National, Aug 2023	Minutes
Air carrier	41.8%	36.7%	37,890
Late-arriving aircraft	45.2%	42.2%	41,051
National Aviation System	12.2%	15.7%	11,077
Extreme weather	0.5%	5.1%	478
Security	0.3%	0.2%	239

90,735 delay minutes on 983 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 August 2023?

65.9% of 3,058 scheduled domestic departures left less than 15 minutes late, and 65.4% reached their destination on time. The national figures that month were 76.7% and 76.9%.

How does that compare with a year earlier?

August 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 August 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.