Airport month record

SJCJUN

Norman Y. Mineta San Jose International in June 2026

Departures: 3,816
Month: June 2026
National, same month: 74.3%
Carriers: 7

Historical statistics for June 2026, not live status or a forecast for this year’s June. For today’s conditions at SJC, see live FAA status.

SJC in June sits in the middle of the pack with a C+. Close to three flights in four arrive on time by the DOT's definition, level with the national rate of 74.3%. The late ones land about 50 minutes behind schedule. That rests on 3,816 flights, of which SkyWest Airlines flew 502 at 86.1% on time.

On time

74.3%

Arrivals under 15 minutes late, of 3,787 completed departures

Avg delay

50 min

Across delayed arrivals only, not all flights

Cancelled

0.58%

Nationally in June: 1.65%

Whole year

82.9%

SJC across all twelve months

These figures cover 3,816 departures from Norman Y. Mineta San Jose International in June 2026. 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

June next to SJC's other months

Against SJC's own year, June ran 9 points worse than the twelve-month rate of 82.9%, which makes it the worst of the twelve months in the data.

SJC month by month
Month	Flights	On time	Avg delay	Cancelled	Grade
July 2025	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 (this page)	3,816	74.3%	50 min	0.58%	C+

Departure window

The best time of day to leave SJC in June

Departure time matters more here than the choice of carrier. The gap between the best and worst window is 33 points, against 18 points between the best and worst carrier. Each bar is the on-time rate for flights scheduled inside that window.

5am–8am760 flights94.0%
8am–11am698 flights80.5%
11am–2pm596 flights72.8%
2pm–5pm619 flights61.0%
5pm–8pm692 flights66.3%
8pm–5am451 flights64.5%

Scale runs 55% to 100%. Rows with fewer than 30 flights show a dash.

Book the early departure. Flights leaving between 5am–8am arrive on time 94.0% of the time, against 61.0% for the afternoon window. That is 33 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 760 flights scheduled in it.

Across the week, Tuesday is the strongest day at 81.8% on time and Thursday the weakest at 69.1%. 13 points is a smaller lever than departure hour, but it is free.

Carrier by carrier

Which airlines ran best at SJC in June

The choice of carrier is not cosmetic here. SkyWest Airlines arrives on time 86.1% of the time; Southwest Airlines manages 67.8%. Sample sizes sit next to every figure, because a two-point gap across 2,295 flights means less than a ten-point one.

Carriers at SJC in June 2026
Airline	Flights	On time	Avg delay	Cancelled	Grade
Southwest Airlines	2,295	67.8%	47 min	0.48%	C+
SkyWest Airlines	502	86.1%	48 min	0.00%	A+
Alaska Airlinesthin sample	335	79.0%	39 min	0.60%	B+
Delta Air Linesthin sample	326	92.3%	52 min	0.92%	A+
American Airlinesthin sample	173	78.1%	138 min	1.73%	B
United Airlinesthin sample	140	80.4%	52 min	0.71%	B+
Frontier Airlinesthin sample	40	73.7%	26 min	5.00%	C−

The spread between SkyWest and Southwest is 18 points, wide enough that it should decide the booking. On a hundred trips that is 18 more arrivals inside the on-time window.

Route by route

Busiest routes out of SJC in June

Routes from SJC in June 2026
Route	Flights	On time	Avg delay	Cancelled	Grade
SJC to SAN · San Diego	463	59.7%	46 min	0.22%	D+
SJC to SEA · Seattle	401	76.8%	40 min	0.25%	B+
SJC to LAX · Los Angeles	395	77.1%	50 min	1.52%	B
SJC to LAS · Las Vegasthin sample	291	74.1%	58 min	0.34%	C+
SJC to SNA · Santa Anathin sample	236	79.9%	39 min	0.85%	B+
SJC to PHX · Phoenixthin sample	231	71.2%	68 min	0.87%	C+
SJC to DEN · Denverthin sample	221	64.1%	48 min	0.00%	D+
SJC to BUR · Burbankthin sample	170	82.7%	55 min	1.18%	B
SJC to SLC · Salt Lake Citythin sample	163	89.0%	84 min	0.00%	A+
SJC to PDX · Portlandthin sample	157	80.3%	46 min	0.00%	B+
SJC to ONT · Ontariothin sample	114	71.7%	46 min	0.88%	C+
SJC to LGB · Long Beachthin sample	112	82.1%	44 min	0.00%	B+
SJC to DFW · Dallas-Fort Worththin sample	92	73.9%	141 min	3.26%	C−
SJC to AUS · Austinthin sample	87	62.8%	44 min	0.00%	D+
SJC to HNL · Honoluluthin sample	87	66.7%	41 min	0.00%	C+
SJC to ATL · Atlantathin sample	86	91.8%	27 min	1.16%	A
SJC to MDW · Chicagothin sample	60	81.0%	28 min	0.00%	B+
SJC to BOI · Boisethin sample	59	64.4%	41 min	0.00%	D+
SJC to MSP · Minneapolisthin sample	56	87.5%	37 min	0.00%	A+
SJC to OGG · Kahuluithin sample	50	93.9%	33 min	2.00%	A
SJC to ORD · Chicagothin sample	30	86.2%	28 min	3.33%	A−
SJC to DAL · Dallasthin sample	30	63.3%	27 min	0.00%	D+
SJC to EUG · Eugenethin sample	30	53.3%	67 min	0.00%	F+
SJC to IAH · Houstonthin sample	30	66.7%	62 min	0.00%	C+
SJC to BWI · Baltimorethin sample	30	73.3%	31 min	0.00%	C+

Delay causes

What held SJC up in June

One category carries most of the weight here. Late-arriving aircraft accounts for 55% of the 49,000 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
55%
Carrier
27%
National Airspace System
16%
Extreme weather
2%
Security
0%

55% 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 49,000 reported delay minutes here, that single category outweighs weather by 31 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 48,506 reported delay minutes.

Cancellations are rare at 0.58%, below the national 1.65% 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.

6.2% of arrivals land an hour or more late, close to the national 9.7%. 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 50 minutes, which a normal layover absorbs.

What to do with this

Flying from SJC in June

For a June trip through SJC: plan on this being one of the airport's harder months. The 5am–8am departures held up best at 94.0% on time, and with 6.2% 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 July80.8%
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%

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