Norman Y. Mineta San Jose International in September 2025

84.1%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 September 2025, reporting carriers scheduled 3,777 domestic departures from Norman Y. Mineta San Jose International (SJC). 84.1% left less than 15 minutes late and 84.9% reached their destination on time; 0.5% were cancelled.

Nationally that month, 83.1% of flights departed on time and 82.8% arrived on time, so SJC departures were 1.0 points above the national departure figure.

A year earlier, in September 2024, the airport had 4,457 departures with 86.0% leaving on time: a change of −1.9 points, with flights down 15%.

Flights arriving at SJC that month were on time 84.2% of the time (3,777 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, late-arriving aircraft 44%, air carrier 28% and national aviation system 27%.

On time 84.9%
Arrived 15+ minutes late 14.4%
Cancelled 0.5%
Diverted 0.3%

Every scheduled departure from SJC in September 2025, judged by arrival at the destination.

September 2025 against a year earlier, the airport's year and the nation

Measure	Sep 2025	Sep 2024	SJC, 12 months to Jul 2026	All reported flights, Sep 2025
Departed on time	84.1%	86.0%	80.9%	83.1%
Arrived on time	84.9%	85.0%	81.9%	82.8%
Cancelled	0.5%	0.4%	0.7%	0.5%
Average departure delay (late minutes only)	9.0 min	7.8 min	10.9 min	12.2 min
Scheduled departures a day	126	149	119	18,748
Scheduled departures	3,777	4,457	43,338	562,439

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
WN Southwest Airlines	2,259	60%	82.3%	2.1 min	0.6%
OO SkyWest Airlines	646	17%	90.1%	-6.7 min	0.2%
DL Delta Air Lines	196	5%	94.4%	-10.8 min	0.0%
AS Alaska Airlines	194	5%	82.0%	-0.7 min	0.0%
UA United Airlines	169	4%	90.5%	-6.4 min	0.6%
AA American Airlines	128	3%	86.7%	-5.9 min	1.6%
NK Spirit Airlines	68	2%	77.9%	2.8 min	1.5%
HA Hawaiian Airlines	60	2%	93.3%	-0.4 min	0.0%
F9 Frontier Airlines	29	1%	69.0%	7.2 min	0.0%
MQ Envoy Air	28	1%	92.9%	-10.3 min	3.6%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
SJC–LAX	San Jose to Los Angeles	424	89.2%	-7.2 min	0.2%
SJC–SAN	San Jose to San Diego	398	77.1%	8.3 min	1.8%
SJC–LAS	San Jose to Las Vegas	375	79.7%	7.4 min	0.8%
SJC–SEA	San Jose to Seattle	367	83.1%	-2.4 min	0.0%
SJC–DEN	San Jose to Denver	264	81.4%	1.3 min	0.4%
SJC–SNA	San Jose to Santa Ana	215	82.8%	0.5 min	0.9%
SJC–BUR	San Jose to Burbank	202	86.1%	-2.4 min	0.5%
SJC–PHX	San Jose to Phoenix	201	84.1%	1.7 min	1.5%
SJC–SLC	San Jose to Salt Lake City	158	92.4%	-4.7 min	0.0%
SJC–PDX	San Jose to Portland	150	82.7%	1.0 min	0.0%
SJC–ONT	San Jose to Ontario	107	84.1%	-1.9 min	0.0%
SJC–LGB	San Jose to Long Beach	103	82.5%	-0.4 min	0.0%

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), September 2025.

Delay causes

BTS cause category	Share of delay minutes	National, Sep 2025	Minutes
Air carrier	27.5%	34.3%	7,624
Late-arriving aircraft	43.7%	37.4%	12,106
National Aviation System	27.2%	22.6%	7,534
Extreme weather	1.5%	5.6%	414
Security	0.1%	0.1%	18

27,696 delay minutes on 543 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 SJC on time in September 2025?

84.1% of 3,777 scheduled domestic departures left less than 15 minutes late, and 84.9% reached their destination on time. The national figures that month were 83.1% and 82.8%.

How does that compare with a year earlier?

In September 2024, 86.0% of 4,457 departures left on time and 0.4% were cancelled, against 84.1% and 0.5% in September 2025.

Provenance

Source: Bureau of Transportation Statistics, Reporting Carrier On-Time Performance, file for September 2025; public domain. Domestic scheduled flights by reporting carriers, totals and averages only. The site's data runs through July 2026. Full record for SJC · methodology · corrections.