Best Time to Fly MDW to SJC: On-Time Stats by Hour & Airline
Chicago Midway International → Norman Y. Mineta San Jose International
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 68.7% of Chicago (MDW) to San Jose (SJC) flights arrived on time (519 scheduled flights). That is 8.9 points below the national average of 77.6%.
Southwest Airlines was the only reporting airline with regular flights on this route.
Over 24 months, Tuesday was the most reliable day (78% on time) and June the worst month (59%).
The cancellation rate was 1.5% (US average 1.8%).
MDW 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 |
|---|---|---|---|---|
| Southwest Airlines | 68.7% | 48 min | 1.5% | 519 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly MDW to SJC
On-time arrival % by scheduled departure hour (local time), 1,078 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 7am–8am | 79.0% | 2.6% | 39 |
| 8am–9am | 86.7% | 0.0% | 225 |
| 9am–10am | 83.3% | 0.7% | 145 |
| 10am–11am | 75.9% | 0.6% | 167 |
| 11am–12pm | Limited data | 9 | |
| 1pm–2pm | Limited data | 4 | |
| 2pm–3pm | Limited data | 11 | |
| 3pm–4pm | 64.5% | 0.0% | 62 |
| 4pm–5pm | 62.9% | 0.0% | 35 |
| 5pm–6pm | 73.7% | 0.0% | 77 |
| 6pm–7pm | Limited data | 30 | |
| 7pm–8pm | 59.8% | 2.2% | 89 |
| 8pm–9pm | 55.4% | 1.9% | 162 |
| 9pm–10pm | Limited data | 23 | |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on MDW 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) | 56.7% | -19.6 pts | 0.0% | 30 |
| Summer peak (Jun 15 - Aug 15) | 64.8% | -11.5 pts | 0.4% | 266 |
| All other days | 76.3% | — | 1.0% | 768 |
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).