San Antonio International in December 2023

85.8%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 3,589 domestic departures from San Antonio International (SAT). 85.8% left less than 15 minutes late and 86.3% reached their destination on time; 0.3% were cancelled.

Nationally that month, 83.1% of flights departed on time and 83.8% arrived on time, so SAT departures were 2.7 points above the national departure figure.

Flights arriving at SAT that month were on time 83.6% of the time (3,585 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, late-arriving aircraft 45%, air carrier 35% and national aviation system 18%.

On time 86.3%
Arrived 15+ minutes late 13.3%
Cancelled 0.3%
Diverted 0.1%

Every scheduled departure from SAT 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	SAT, 12 months to Jul 2026	All reported flights, Dec 2023
Departed on time	85.8%	—	80.3%	83.1%
Arrived on time	86.3%	—	80.6%	83.8%
Cancelled	0.3%	—	1.2%	0.4%
Average departure delay (late minutes only)	8.7 min	—	14.7 min	11.6 min
Scheduled departures a day	120	—	110	19,013
Scheduled departures	3,589	—	40,226	570,394

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
WN Southwest Airlines	1,501	42%	84.5%	0.2 min	0.5%
AA American Airlines	662	18%	85.6%	-0.4 min	0.0%
DL Delta Air Lines	514	14%	93.2%	-4.5 min	0.0%
UA United Airlines	466	13%	92.7%	-4.3 min	0.0%
NK Spirit Airlines	145	4%	75.9%	6.5 min	0.7%
F9 Frontier Airlines	70	2%	81.4%	-2.4 min	1.4%
AS Alaska Airlines	62	2%	80.6%	0.2 min	0.0%
B6 JetBlue Airways	62	2%	66.1%	25.9 min	1.6%
OO SkyWest Airlines	62	2%	95.2%	-7.8 min	0.0%
MQ Envoy Air	45	1%	77.8%	4.1 min	0.0%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
SAT–DFW	San Antonio to Dallas/Fort Worth	357	82.6%	0.5 min	0.0%
SAT–ATL	San Antonio to Atlanta	287	93.4%	-6.2 min	0.3%
SAT–DEN	San Antonio to Denver	283	86.2%	-2.2 min	0.0%
SAT–DAL	San Antonio to Dallas	249	87.6%	-2.1 min	1.2%
SAT–PHX	San Antonio to Phoenix	232	88.4%	-2.2 min	0.0%
SAT–LAS	San Antonio to Las Vegas	203	81.8%	0.4 min	0.5%
SAT–LAX	San Antonio to Los Angeles	182	88.5%	-4.6 min	0.0%
SAT–IAH	San Antonio to Houston	153	93.5%	-5.0 min	0.0%
SAT–HOU	San Antonio to Houston	150	90.7%	-4.0 min	0.0%
SAT–CLT	San Antonio to Charlotte	120	86.7%	-0.2 min	0.0%
SAT–MCO	San Antonio to Orlando	120	69.2%	13.2 min	0.8%
SAT–ORD	San Antonio to Chicago	113	94.7%	-8.7 min	0.0%

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	35.4%	37.1%	9,065
Late-arriving aircraft	45.0%	38.8%	11,513
National Aviation System	18.1%	17.6%	4,626
Extreme weather	1.1%	6.2%	278
Security	0.5%	0.3%	117

25,599 delay minutes on 476 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 SAT on time in December 2023?

85.8% of 3,589 scheduled domestic departures left less than 15 minutes late, and 86.3% 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 SAT · methodology · corrections.