San Antonio International in December 2024

81.2%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 2024, reporting carriers scheduled 3,451 domestic departures from San Antonio International (SAT). 81.2% left less than 15 minutes late and 81.7% reached their destination on time; 0.6% were cancelled.

Nationally that month, 77.8% of flights departed on time and 78.1% arrived on time, so SAT departures were 3.4 points above the national departure figure.

A year earlier, in December 2023, the airport had 3,589 departures with 85.8% leaving on time: a change of −4.6 points, with flights down 4%.

Flights arriving at SAT that month were on time 77.8% of the time (3,449 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, late-arriving aircraft 44%, air carrier 32% and national aviation system 16%.

On time 81.7%
Arrived 15+ minutes late 17.5%
Cancelled 0.6%
Diverted 0.2%

Every scheduled departure from SAT in December 2024, judged by arrival at the destination.

December 2024 against a year earlier, the airport's year and the nation

Measure	Dec 2024	Dec 2023	SAT, 12 months to Jul 2026	All reported flights, Dec 2024
Departed on time	81.2%	85.8%	80.3%	77.8%
Arrived on time	81.7%	86.3%	80.6%	78.1%
Cancelled	0.6%	0.3%	1.2%	0.7%
Average departure delay (late minutes only)	15.4 min	8.7 min	14.7 min	16.6 min
Scheduled departures a day	115	120	110	19,686
Scheduled departures	3,451	3,589	40,226	590,581

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
WN Southwest Airlines	1,402	41%	81.7%	4.4 min	0.1%
AA American Airlines	643	19%	77.4%	19.3 min	1.7%
DL Delta Air Lines	557	16%	81.3%	4.0 min	0.2%
UA United Airlines	464	13%	86.2%	4.2 min	0.9%
NK Spirit Airlines	127	4%	87.4%	-5.2 min	0.8%
OO SkyWest Airlines	96	3%	88.5%	0.9 min	0.0%
F9 Frontier Airlines	66	2%	83.3%	2.5 min	0.0%
AS Alaska Airlines	53	2%	79.2%	2.0 min	0.0%
MQ Envoy Air	32	1%	68.8%	12.2 min	3.1%
YX Republic Airline	11	0%	81.8%	-1.5 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	70.3%	28.4 min	2.8%
SAT–DEN	San Antonio to Denver	264	86.4%	2.2 min	0.0%
SAT–ATL	San Antonio to Atlanta	246	82.9%	5.9 min	0.0%
SAT–PHX	San Antonio to Phoenix	242	87.6%	-3.1 min	0.0%
SAT–DAL	San Antonio to Dallas	220	78.2%	10.0 min	0.5%
SAT–LAS	San Antonio to Las Vegas	196	87.8%	-5.3 min	0.0%
SAT–LAX	San Antonio to Los Angeles	184	87.5%	-4.0 min	0.0%
SAT–IAH	San Antonio to Houston	182	84.1%	6.1 min	1.1%
SAT–HOU	San Antonio to Houston	122	79.5%	9.6 min	0.0%
SAT–ORD	San Antonio to Chicago	120	90.8%	-5.6 min	0.8%
SAT–CLT	San Antonio to Charlotte	114	80.7%	30.3 min	0.0%
SAT–MCO	San Antonio to Orlando	113	82.3%	1.2 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 2024.

Delay causes

BTS cause category	Share of delay minutes	National, Dec 2024	Minutes
Air carrier	31.7%	34.3%	15,357
Late-arriving aircraft	44.2%	40.2%	21,437
National Aviation System	16.3%	17.8%	7,900
Extreme weather	7.8%	7.5%	3,765
Security	0.0%	0.2%	18

48,477 delay minutes on 603 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 2024?

81.2% of 3,451 scheduled domestic departures left less than 15 minutes late, and 81.7% reached their destination on time. The national figures that month were 77.8% and 78.1%.

How does that compare with a year earlier?

In December 2023, 85.8% of 3,589 departures left on time and 0.3% were cancelled, against 81.2% and 0.6% in December 2024.

Provenance

Source: Bureau of Transportation Statistics, Reporting Carrier On-Time Performance, file for December 2024; 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.