Houston (IAH) to San Jose (SJC): On-Time Performance
Data through May 2026
Houston (IAH) to San Jose (SJC) is a thinner route than most in this dataset — 215 departures over the past year, roughly 4 a week — so treat these numbers as indicative rather than definitive. Of the flights that did operate, 78% arrived on time.
- On-time
- 78%
- arrived <15 min late
- Avg delay
- 15 min
- completed flights
- Cancelled
- 0.9%
- Flights/day
- 0.59
- last 12 months
- Duration
- 4h 6m
- scheduled
- Distance
- 1,608 mi
Monthly on-time trend
Best time to fly from IAH to SJC
Aim for departures around 10 a.m. (87% on-time); avoid 8 p.m. departures (63%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 74% | 17 min |
| Tuesday | 77% | 17 min |
| Wednesday | 80% | 14 min |
| Thursday | 81% | 16 min |
| Friday | 74% | 16 min |
| Saturday | 79% | 15 min |
| Sundaybest | 84% | 9 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft42%
- Airline operations39%
- National airspace system13%
- Weather6%
Frequently asked questions
- How often are flights from IAH to SJC delayed?
- 22% of IAH–SJC flights arrived 15 or more minutes late (the US DOT definition of a delay) between 2024-06 and 2026-05. The average arrival delay across completed flights was 15 minutes.
- What is the best time of day to fly from IAH to SJC?
- Departures around 10 a.m. have the best record (87% on-time), while departures around 8 p.m. have the worst (63%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from IAH to SJC?
- The scheduled IAH–SJC flight time averages 4h 6m over 1,608 miles. Actual arrival times vary — flights on this route land 15+ minutes late 22% of the time.
- How often are IAH to SJC flights cancelled?
- 0.9% of scheduled flights on this route were cancelled between 2024-06 and 2026-05, at or below the national rate of 1.6%.
- What is the worst month to fly from IAH to SJC?
- July 2024 was the roughest month in this dataset, with only 50% of arrivals on time. The best was September 2025 at 97%. If your dates are flexible, that 47-point gap is worth planning around.
Explore related pages
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Based on 466 flights, 2024-06–2026-05. Source: US DOT Bureau of Transportation Statistics. Updated 2026-07-01.