Luis Munoz Marin International in December 2023

75.8%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 December 2023, reporting carriers scheduled 3,057 domestic departures from Luis Munoz Marin International (SJU). 75.8% left less than 15 minutes late and 75.8% reached their destination on time; 0.2% were cancelled.

Nationally that month, 83.1% of flights departed on time and 83.8% arrived on time, so SJU departures were 7.3 points below the national departure figure.

Flights arriving at SJU that month were on time 73.6% of the time (3,067 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 14%.

On time 75.8%
Arrived 15+ minutes late 23.7%
Cancelled 0.2%
Diverted 0.3%

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

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

Measure	Dec 2023	Year earlier	SJU, 12 months to Jul 2026	All reported flights, Dec 2023
Departed on time	75.8%	—	74.5%	83.1%
Arrived on time	75.8%	—	75.6%	83.8%
Cancelled	0.2%	—	2.0%	0.4%
Average departure delay (late minutes only)	19.0 min	—	19.6 min	11.6 min
Scheduled departures a day	102	—	97	19,013
Scheduled departures	3,057	—	35,302	570,394

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
B6 JetBlue Airways	842	28%	69.5%	15.4 min	0.1%
F9 Frontier Airlines	485	16%	72.8%	13.6 min	0.4%
NK Spirit Airlines	454	15%	73.6%	12.0 min	0.2%
AA American Airlines	365	12%	71.5%	18.0 min	0.0%
DL Delta Air Lines	327	11%	92.7%	-9.6 min	0.0%
WN Southwest Airlines	311	10%	80.4%	7.0 min	0.0%
UA United Airlines	273	9%	85.0%	-1.3 min	0.4%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
SJU–MCO	San Juan to Orlando	570	75.6%	11.8 min	0.0%
SJU–JFK	San Juan to New York	281	82.9%	1.7 min	0.4%
SJU–MIA	San Juan to Miami	230	77.0%	16.4 min	0.0%
SJU–ATL	San Juan to Atlanta	208	80.3%	2.1 min	0.5%
SJU–EWR	San Juan to Newark	189	78.3%	8.3 min	0.0%
SJU–FLL	San Juan to Fort Lauderdale	175	65.7%	20.7 min	0.0%
SJU–BOS	San Juan to Boston	173	73.4%	6.4 min	0.0%
SJU–TPA	San Juan to Tampa	165	86.7%	10.9 min	0.0%
SJU–PHL	San Juan to Philadelphia	132	59.8%	24.4 min	0.0%
SJU–BWI	San Juan to Baltimore	115	73.9%	8.1 min	1.7%
SJU–CLT	San Juan to Charlotte	102	76.5%	8.6 min	0.0%
SJU–ORD	San Juan to Chicago	101	80.2%	2.9 min	1.0%

By scheduled departure hour

100

On-time share:under 62%6270768288% and over

Share of departures that left less than 15 minutes late, by scheduled hour (local time), December 2023.

Delay causes

BTS cause category	Share of delay minutes	National, Dec 2023	Minutes
Air carrier	37.6%	37.1%	19,965
Late-arriving aircraft	47.3%	38.8%	25,109
National Aviation System	14.2%	17.6%	7,522
Extreme weather	0.8%	6.2%	425
Security	0.1%	0.3%	66

53,087 delay minutes on 725 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 December 2023?

75.8% of 3,057 scheduled domestic departures left less than 15 minutes late, and 75.8% reached their destination on time. The national figures that month were 83.1% and 83.8%.

How does that compare with a year earlier?

December 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 December 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.