Airport month record

SJCAPR

Norman Y. Mineta San Jose International in April 2026

Departures: 3,423
Month: April 2026
National, same month: 79.8%
Carriers: 7

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

SJC in April earns a B+. More than four flights in five arrive inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 4 points better than the national rate of 79.8%. When something does go wrong the average delay runs about 45 minutes. That rests on 3,423 flights, of which SkyWest Airlines flew 513 at 90.4% on time.

Set against the rest of the country, SJC's April record is 4 points better than the US average of 79.8%. That gap is worth roughly 44 fewer late arrivals for every thousand flights.

On time

84.2%

Arrivals under 15 minutes late, of 3,405 completed departures

Avg delay

45 min

Across delayed arrivals only, not all flights

Cancelled

0.50%

Nationally in April: 0.90%

Whole year

82.9%

SJC across all twelve months

These figures cover 3,423 departures from Norman Y. Mineta San Jose International in April 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

April next to SJC's other months

Against SJC's own year, April ran about a point better than the twelve-month rate of 82.9%, which makes it number five of twelve months, best first. Either side of it, March ran 85.6% on time and May 81.7%, so this month sits in line with its neighbours.

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 (this page)	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 April

Departure time matters more here than the choice of carrier. The gap between the best and worst window is 24 points, against 10 points between the best and worst carrier. Each bar is the on-time rate for flights scheduled inside that window.

5am–8am724 flights96.5%
8am–11am601 flights91.5%
11am–2pm568 flights86.0%
2pm–5pm634 flights76.4%
5pm–8pm513 flights72.9%
8pm–5am383 flights74.9%

Scale runs 65% to 100%. Rows with fewer than 30 flights show a dash.

Book the early departure. Flights leaving between 5am–8am arrive on time 96.5% of the time, against 72.9% for the evening 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 724 flights scheduled in it.

Across the week, Tuesday is the strongest day at 93.0% on time and Friday the weakest at 77.4%. 16 points is a smaller lever than departure hour, but it is free.

Carrier by carrier

Which airlines ran best at SJC in April

The choice of carrier is not cosmetic here. SkyWest Airlines arrives on time 90.4% of the time; Southwest Airlines manages 80.4%. Sample sizes sit next to every figure, because a two-point gap across 2,156 flights means less than a ten-point one.

Carriers at SJC in April 2026
Airline	Flights	On time	Avg delay	Cancelled	Grade
Southwest Airlines	2,156	80.4%	43 min	0.32%	B+
SkyWest Airlines	513	90.4%	53 min	0.19%	A+
Delta Air Linesthin sample	266	95.8%	47 min	1.88%	A
Alaska Airlinesthin sample	222	89.1%	43 min	0.45%	A+
American Airlinesthin sample	143	86.6%	63 min	0.70%	A+
United Airlinesthin sample	92	93.5%	51 min	0.00%	A+
Frontier Airlinesthin sample	31	72.4%	48 min	6.45%	C−

SkyWest leads Southwest by 10 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 April

Routes from SJC in April 2026
Route	Flights	On time	Avg delay	Cancelled	Grade
SJC to SAN · San Diego	454	76.2%	39 min	0.00%	B+
SJC to LAX · Los Angelesthin sample	344	89.7%	45 min	1.45%	A
SJC to SEA · Seattlethin sample	306	86.6%	39 min	0.33%	A+
SJC to LAS · Las Vegasthin sample	290	80.1%	48 min	1.03%	B
SJC to PHX · Phoenixthin sample	272	84.8%	48 min	0.74%	B+
SJC to SNA · Santa Anathin sample	233	84.3%	54 min	1.29%	B
SJC to DEN · Denverthin sample	167	85.5%	66 min	0.60%	A+
SJC to BUR · Burbankthin sample	163	83.4%	36 min	0.00%	B+
SJC to SLC · Salt Lake Citythin sample	135	92.6%	52 min	0.00%	A+
SJC to PDX · Portlandthin sample	115	90.4%	82 min	0.00%	A+
SJC to LGB · Long Beachthin sample	115	87.8%	40 min	0.00%	A+
SJC to ONT · Ontariothin sample	106	85.8%	38 min	0.00%	A+
SJC to AUS · Austinthin sample	101	79.2%	52 min	0.00%	B+
SJC to DFW · Dallas-Fort Worththin sample	89	83.0%	67 min	1.12%	B
SJC to ATL · Atlantathin sample	60	100.0%	—	1.67%	A
SJC to HNL · Honoluluthin sample	59	78.0%	39 min	0.00%	B+
SJC to MDW · Chicagothin sample	56	85.7%	27 min	0.00%	A+
SJC to BOI · Boisethin sample	47	74.5%	41 min	0.00%	C+
SJC to OGG · Kahuluithin sample	36	88.9%	46 min	0.00%	A+
SJC to PSP · Palm Springsthin sample	32	77.4%	33 min	0.00%	B+
SJC to DAL · Dallasthin sample	30	100.0%	—	0.00%	A+
SJC to EUG · Eugenethin sample	30	60.0%	46 min	0.00%	D+
SJC to ORD · Chicagothin sample	30	90.0%	29 min	0.00%	A+
SJC to BWI · Baltimorethin sample	30	73.3%	27 min	0.00%	C+
SJC to HOU · Houstonthin sample	30	73.3%	22 min	0.00%	C+

Delay causes

What held SJC up in April

One category carries most of the weight here. Late-arriving aircraft accounts for 52% of the 24,000 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
52%
Carrier
28%
National Airspace System
19%
Extreme weather
1%
Security
0%

52% 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 24,000 reported delay minutes here, that single category outweighs weather by 52 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 24,270 reported delay minutes.

Cancellations are rare at 0.50%, below the national 0.90% 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.

Badly late arrivals are rare here: only 3.1% land an hour or more behind schedule, against 6.4% nationally. Connections built on this flight are about as safe as US domestic connections get, though a cancelled flight still ignores every layover you give it.

What to do with this

Flying from SJC in April

For a April trip through SJC: expect 84.2% on time and 0.50% cancelled, going by April 2026. The 5am–8am window was the strongest part of the day.

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 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