Airport month record

SJCJUL

Norman Y. Mineta San Jose International in July 2025

Departures: 4,120
Month: July 2025
National, same month: 71.1%
Carriers: 9

Historical statistics for July 2025, not live status or a forecast for this year’s July. For today’s conditions at SJC, see live FAA status.

SJC in July lands a B+, 10 points better than the national rate of 71.1%. About one flight in five arrives 15 minutes late or worse, and those flights are late by about an hour on average. That is a workable record, not a spotless one. That rests on 4,120 flights, of which SkyWest Airlines flew 600 at 90.0% on time.

Set against the rest of the country, SJC's July record is 10 points better than the US average of 71.1%. That gap is worth roughly 97 fewer late arrivals for every thousand flights.

On time

80.8%

Arrivals under 15 minutes late, of 4,073 completed departures

Avg delay

60 min

Across delayed arrivals only, not all flights

Cancelled

0.87%

Nationally in July: 2.45%

Whole year

82.9%

SJC across all twelve months

These figures cover 4,120 departures from Norman Y. Mineta San Jose International in July 2025. On time means an arrival less than 15 minutes after the scheduled gate time, the DOT's threshold, and the national comparison uses every US departure in the same month rather than the whole year.

Against the year

July next to SJC's other months

Against SJC's own year, July ran 2 points worse than the twelve-month rate of 82.9%, which makes it number eleven of twelve months, best first.

SJC month by month
Month	Flights	On time	Avg delay	Cancelled	Grade
July 2025 (this page)	4,120	80.8%	60 min	0.87%	B+
August 2025	3,885	83.5%	54 min	0.36%	B+
September 2025	3,777	85.5%	51 min	0.50%	A+
October 2025	3,865	81.5%	52 min	0.41%	B+
November 2025	3,659	83.0%	57 min	1.12%	B
December 2025	3,622	81.2%	58 min	0.86%	B+
January 2026	3,099	89.3%	61 min	1.19%	A
February 2026	3,088	87.0%	51 min	0.58%	A+
March 2026	3,438	85.6%	59 min	0.96%	A+
April 2026	3,423	84.2%	45 min	0.50%	B+
May 2026	3,686	81.7%	48 min	0.38%	B+
June 2026	3,816	74.3%	50 min	0.58%	C+

Departure window

The best time of day to leave SJC in July

Departure time matters more here than the choice of carrier. The gap between the best and worst window is 24 points, against 12 points between the best and worst carrier. Each bar is the on-time rate for flights scheduled inside that window.

5am–8am882 flights93.7%
8am–11am686 flights90.4%
11am–2pm863 flights79.0%
2pm–5pm587 flights72.9%
5pm–8pm685 flights70.9%
8pm–5am417 flights69.6%

Scale runs 60% to 100%. Rows with fewer than 30 flights show a dash.

Book the early departure. Flights leaving between 5am–8am arrive on time 93.7% of the time, against 69.6% for the overnight window. That is 24 points of difference for no extra money, and it comes from the same aircraft having had no earlier flight to fall behind on. The 5am–8am window is the busiest, with 882 flights scheduled in it.

Across the week, Saturday is the strongest day at 87.3% on time and Thursday the weakest at 74.1%. 13 points is a smaller lever than departure hour, but it is free.

Carrier by carrier

Which airlines ran best at SJC in July

The choice of carrier is not cosmetic here. SkyWest Airlines arrives on time 90.0% of the time; Southwest Airlines manages 78.2%. Sample sizes sit next to every figure, because a two-point gap across 2,505 flights means less than a ten-point one.

Carriers at SJC in July 2025
Airline	Flights	On time	Avg delay	Cancelled	Grade
Southwest Airlines	2,505	78.2%	54 min	0.72%	B+
SkyWest Airlines	600	90.0%	73 min	0.00%	A+
Delta Air Linesthin sample	262	89.7%	63 min	0.00%	A+
Alaska Airlinesthin sample	218	76.4%	54 min	4.59%	B−
American Airlinesthin sample	169	80.5%	129 min	2.37%	B
United Airlinesthin sample	152	71.8%	75 min	1.32%	C
Spirit Airlinesthin sample	99	87.9%	98 min	0.00%	A+
Hawaiian Airlinesthin sample	62	90.3%	79 min	0.00%	A+
Envoy Airthin sample	30	93.3%	29 min	0.00%	A+

SkyWest leads Southwest by 12 points. Real, but small enough that a better departure time on the weaker carrier can outweigh it.

Route by route

Busiest routes out of SJC in July

Routes from SJC in July 2025
Route	Flights	On time	Avg delay	Cancelled	Grade
SJC to SAN · San Diego	471	78.2%	47 min	0.85%	B+
SJC to SEA · Seattle	425	78.4%	58 min	2.12%	B
SJC to LAS · Las Vegas	380	74.1%	62 min	1.05%	C
SJC to LAX · Los Angeles	368	87.7%	55 min	0.27%	A+
SJC to DEN · Denverthin sample	249	67.8%	72 min	0.80%	C+
SJC to PHX · Phoenixthin sample	247	82.0%	70 min	0.81%	B+
SJC to SNA · Santa Anathin sample	217	89.2%	42 min	1.84%	A
SJC to BUR · Burbankthin sample	205	79.3%	57 min	0.98%	B+
SJC to SLC · Salt Lake Citythin sample	176	89.8%	85 min	0.00%	A+
SJC to PDX · Portlandthin sample	136	75.0%	58 min	0.00%	B+
SJC to DFW · Dallas-Fort Worththin sample	129	75.0%	106 min	3.10%	B−
SJC to ONT · Ontariothin sample	118	81.4%	67 min	0.00%	B+
SJC to AUS · Austinthin sample	111	81.7%	54 min	0.00%	B+
SJC to LGB · Long Beachthin sample	105	84.8%	66 min	0.00%	B+
SJC to HNL · Honoluluthin sample	93	85.9%	57 min	1.08%	A
SJC to ATL · Atlantathin sample	88	89.8%	42 min	0.00%	A+
SJC to MDW · Chicagothin sample	80	75.6%	53 min	1.25%	B
SJC to BOI · Boisethin sample	62	93.5%	44 min	0.00%	A+
SJC to DAL · Dallasthin sample	62	78.7%	62 min	0.00%	B+
SJC to MSP · Minneapolisthin sample	57	87.7%	48 min	0.00%	A+
SJC to OGG · Kahuluithin sample	52	100.0%	—	0.00%	A+
SJC to BNA · Nashvillethin sample	31	74.2%	52 min	0.00%	C+
SJC to BWI · Baltimorethin sample	31	87.1%	59 min	0.00%	A+
SJC to HOU · Houstonthin sample	31	93.1%	28 min	0.00%	A+
SJC to GEG · Spokanethin sample	31	77.4%	39 min	0.00%	B+

Delay causes

What held SJC up in July

One category carries most of the weight here. Late-arriving aircraft accounts for 51% of the 47,000 delay minutes carriers reported, and the remaining four split what is left. The split is by minutes rather than by flights, so a few very long delays count for as much as many short ones.

Late-arriving aircraft
51%
Carrier
29%
National Airspace System
17%
Extreme weather
3%
Security
0%

51% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. That is a cascade, and cascades start small and grow through the day. Across 47,000 reported delay minutes here, that single category outweighs weather by 17 to one. It is the strongest argument for booking the first departure of the morning, when the aircraft has been sitting at the gate overnight with nothing to inherit. The split is drawn from 47,058 reported delay minutes.

Cancellations are rare at 0.87%, below the national 2.45% and low enough to earn the plus on the grade. Roughly one flight in 100 is called off; the risk here is arriving late, not not arriving.

5.9% of arrivals land an hour or more late, close to the national 12.1%. That is the figure that decides a connection, and it says a 60 to 75 minute layover is reasonable here while anything under 45 minutes is a bet. Most delays on this route last about an hour, which a normal layover absorbs.

What to do with this

Flying from SJC in July

For a July trip through SJC: plan on this being one of the airport's harder months. The 5am–8am departures held up best at 93.7% on time, and with 5.9% of arrivals an hour or more late, a connection here deserves more slack than the same trip in January would.

Norman Y. Mineta San Jose International (SJC), the whole year
SJC in August83.5%
SJC in September85.5%
SJC in October81.5%
SJC in November83.0%
SJC in December81.2%
SJC in January89.3%
SJC in February87.0%
SJC in March85.6%
SJC in April84.2%
SJC in May81.7%
SJC in June74.3%

Source: US DOT Bureau of Transportation Statistics, on-time performance data, July 2025 to June 2026. Last updated 15 September 2026; recomputed monthly. How this data is collected.

Key figures