Best Time to Fly ORD to SJC: On-Time Stats by Hour & Airline
Chicago O'Hare International → Norman Y. Mineta San Jose International
Data through July 2026 · Last updated October 18, 2026
301 flights were scheduled from Chicago (ORD) to San Jose (SJC) in the last 12 months, and 68.6% of those that flew arrived on time, 9.0 points below the US average of 77.6%.
United Airlines was the only reporting airline with regular flights on this route.
Over 24 months, Saturday was the most reliable day (76% on time) and June the worst month (47%).
The cancellation rate was 1.7% (US average 1.8%).
ORD to SJC on-time performance by airline
Last 12 months. Airlines with fewer than 30 completed flights are marked “limited data”.
| Airline | On time | Avg delay when late | Cancelled | Flights |
|---|---|---|---|---|
| United Airlines | 68.1% | 75 min | 1.7% | 293 |
| American Airlines | Limited data | 8 | ||
80%+ good 70–79.9% fair <70% poor
Best time of day to fly ORD to SJC
On-time arrival % by scheduled departure hour (local time), 666 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 6am–7am | Limited data | 2 | |
| 7am–8am | Limited data | 5 | |
| 9am–10am | 84.4% | 0.0% | 180 |
| 10am–11am | Limited data | 3 | |
| 12pm–1pm | Limited data | 1 | |
| 1pm–2pm | Limited data | 1 | |
| 3pm–4pm | Limited data | 27 | |
| 4pm–5pm | Limited data | 10 | |
| 5pm–6pm | Limited data | 1 | |
| 6pm–7pm | Limited data | 1 | |
| 7pm–8pm | 64.0% | 2.0% | 394 |
| 8pm–9pm | 57.5% | 0.0% | 41 |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on ORD to SJC
On-time arrivals during holiday periods compared with all other days, last 24 months.
| Period | On time | vs other days | Cancelled | Flights |
|---|---|---|---|---|
| Thanksgiving week (Tue before to Mon after) | Limited data | 14 | ||
| Christmas & New Year (Dec 20 - Jan 3) | Limited data | 22 | ||
| Summer peak (Jun 15 - Aug 15) | 55.5% | -20.0 pts | 4.0% | 124 |
| All other days | 75.5% | — | 0.6% | 506 |
Monthly on-time trend
On-time arrival % each month, with the 12-month US average for reference.
What causes delays on this route
Share of reported delay minutes, last 12 months (BTS cause categories).