San Antonio International in April 2026

82.4%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 April 2026, reporting carriers scheduled 3,384 domestic departures from San Antonio International (SAT). 82.4% left less than 15 minutes late and 81.7% reached their destination on time; 0.7% were cancelled.

Nationally that month, 79.1% of flights departed on time and 78.9% arrived on time, so SAT departures were 3.3 points above the national departure figure.

A year earlier, in April 2025, the airport had 3,536 departures with 81.1% leaving on time: a change of +1.3 points, with flights down 4%.

Flights arriving at SAT that month were on time 78.5% of the time (3,385 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, late-arriving aircraft 39%, air carrier 33% and national aviation system 24%.

On time 81.7%
Arrived 15+ minutes late 17.2%
Cancelled 0.7%
Diverted 0.4%

Every scheduled departure from SAT in April 2026, judged by arrival at the destination.

April 2026 against a year earlier, the airport's year and the nation

Measure	Apr 2026	Apr 2025	SAT, 12 months to Jul 2026	All reported flights, Apr 2026
Departed on time	82.4%	81.1%	80.3%	79.1%
Arrived on time	81.7%	81.1%	80.6%	78.9%
Cancelled	0.7%	1.2%	1.2%	0.9%
Average departure delay (late minutes only)	12.3 min	14.3 min	14.7 min	14.5 min
Scheduled departures a day	113	118	110	19,931
Scheduled departures	3,384	3,536	40,226	597,919

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
WN Southwest Airlines	1,334	39%	80.0%	2.5 min	0.3%
AA American Airlines	590	17%	83.6%	6.1 min	0.7%
DL Delta Air Lines	568	17%	87.0%	-2.9 min	0.9%
UA United Airlines	491	15%	83.9%	0.4 min	0.2%
OO SkyWest Airlines	145	4%	82.8%	18.2 min	0.7%
MQ Envoy Air	107	3%	66.4%	6.8 min	2.8%
F9 Frontier Airlines	61	2%	75.4%	3.0 min	1.6%
NK Spirit Airlines	52	2%	61.5%	30.0 min	5.8%
AS Alaska Airlines	30	1%	90.0%	-4.6 min	3.3%
YX Republic Airline	6	0%	33.3%	17.8 min	33.3%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
SAT–DFW	San Antonio to Dallas/Fort Worth	356	77.2%	4.3 min	1.1%
SAT–DAL	San Antonio to Dallas	250	82.4%	0.3 min	0.4%
SAT–DEN	San Antonio to Denver	250	85.6%	-1.5 min	0.0%
SAT–ATL	San Antonio to Atlanta	248	87.9%	-4.5 min	0.8%
SAT–PHX	San Antonio to Phoenix	232	85.8%	-1.8 min	0.4%
SAT–IAH	San Antonio to Houston	216	81.0%	5.6 min	0.0%
SAT–ORD	San Antonio to Chicago	175	71.4%	5.3 min	2.9%
SAT–LAS	San Antonio to Las Vegas	163	77.3%	5.8 min	1.2%
SAT–LAX	San Antonio to Los Angeles	146	85.6%	7.1 min	0.0%
SAT–CLT	San Antonio to Charlotte	115	86.1%	16.6 min	0.0%
SAT–HOU	San Antonio to Houston	98	61.2%	11.2 min	0.0%
SAT–MCO	San Antonio to Orlando	90	67.8%	21.8 min	1.1%

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), April 2026.

Delay causes

BTS cause category	Share of delay minutes	National, Apr 2026	Minutes
Air carrier	32.7%	33.5%	12,522
Late-arriving aircraft	39.3%	40.4%	15,051
National Aviation System	23.5%	21.0%	8,988
Extreme weather	4.4%	5.0%	1,692
Security	0.1%	0.1%	45

38,298 delay minutes on 583 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 April 2026?

82.4% of 3,384 scheduled domestic departures left less than 15 minutes late, and 81.7% reached their destination on time. The national figures that month were 79.1% and 78.9%.

How does that compare with a year earlier?

In April 2025, 81.1% of 3,536 departures left on time and 1.2% were cancelled, against 82.4% and 0.7% in April 2026.

Provenance

Source: Bureau of Transportation Statistics, Reporting Carrier On-Time Performance, file for April 2026; 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.