Norman Y. Mineta San Jose International in December 2024

81.4%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 December 2024, reporting carriers scheduled 4,154 domestic departures from Norman Y. Mineta San Jose International (SJC). 81.4% left less than 15 minutes late and 82.9% reached their destination on time; 0.9% were cancelled.

Nationally that month, 77.8% of flights departed on time and 78.1% arrived on time, so SJC departures were 3.6 points above the national departure figure.

A year earlier, in December 2023, the airport had 4,207 departures with 86.7% leaving on time: a change of −5.3 points, with flights down 1%.

Flights arriving at SJC that month were on time 80.7% of the time (4,148 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, late-arriving aircraft 45%, air carrier 30% and national aviation system 21%.

On time 82.9%
Arrived 15+ minutes late 15.8%
Cancelled 0.9%
Diverted 0.4%

Every scheduled departure from SJC 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	SJC, 12 months to Jul 2026	All reported flights, Dec 2024
Departed on time	81.4%	86.7%	80.9%	77.8%
Arrived on time	82.9%	87.3%	81.9%	78.1%
Cancelled	0.9%	0.3%	0.7%	0.7%
Average departure delay (late minutes only)	12.2 min	7.9 min	10.9 min	16.6 min
Scheduled departures a day	139	140	119	19,686
Scheduled departures	4,154	4,207	43,338	590,581

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
WN Southwest Airlines	2,360	57%	82.3%	2.7 min	1.2%
OO SkyWest Airlines	646	16%	80.0%	5.4 min	0.9%
NK Spirit Airlines	269	6%	78.4%	10.0 min	0.0%
AS Alaska Airlines	219	5%	88.6%	-7.2 min	0.5%
DL Delta Air Lines	172	4%	95.9%	-11.3 min	0.0%
UA United Airlines	169	4%	93.5%	-8.6 min	0.0%
AA American Airlines	114	3%	75.4%	16.5 min	0.9%
F9 Frontier Airlines	109	3%	80.7%	5.6 min	0.0%
HA Hawaiian Airlines	62	1%	85.5%	-4.4 min	1.6%
MQ Envoy Air	34	1%	91.2%	-7.9 min	0.0%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
SJC–SAN	San Jose to San Diego	469	69.5%	15.7 min	3.8%
SJC–LAX	San Jose to Los Angeles	455	81.3%	3.6 min	0.2%
SJC–LAS	San Jose to Las Vegas	420	82.1%	5.4 min	0.5%
SJC–SEA	San Jose to Seattle	346	85.0%	-1.8 min	0.3%
SJC–PHX	San Jose to Phoenix	297	86.9%	4.2 min	0.3%
SJC–DEN	San Jose to Denver	273	89.7%	-2.3 min	0.0%
SJC–SNA	San Jose to Santa Ana	241	86.3%	-2.4 min	2.5%
SJC–BUR	San Jose to Burbank	215	81.4%	2.0 min	1.4%
SJC–PDX	San Jose to Portland	197	84.3%	5.7 min	0.0%
SJC–SLC	San Jose to Salt Lake City	138	92.0%	-10.7 min	0.0%
SJC–LGB	San Jose to Long Beach	126	84.1%	0.2 min	0.8%
SJC–DFW	San Jose to Dallas/Fort Worth	113	69.9%	11.2 min	0.9%

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), December 2024.

Delay causes

BTS cause category	Share of delay minutes	National, Dec 2024	Minutes
Air carrier	30.4%	34.3%	12,868
Late-arriving aircraft	44.6%	40.2%	18,904
National Aviation System	20.8%	17.8%	8,799
Extreme weather	4.1%	7.5%	1,731
Security	0.1%	0.2%	59

42,361 delay minutes on 657 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 December 2024?

81.4% of 4,154 scheduled domestic departures left less than 15 minutes late, and 82.9% 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, 86.7% of 4,207 departures left on time and 0.3% were cancelled, against 81.4% and 0.9% 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 SJC · methodology · corrections.