SJC to IAH flight delays
San Jose, CA (SJC) Houston, TX (IAH) · 1,608 miles
215 flights · January 2025 – August 2026 · US Bureau of Transportation Statistics
73.02%
Arrived on time
Within 15 minutes of schedule
0%
Cancelled
Share of scheduled flights
63 min
When late, late by
Average across delayed arrivals
19 min
Delay per flight
Averaged over every flight flown
What the record says about this route
The season swings this route hard. In September it ran 43.3 points more punctual than in July — a difference bigger than the one between the best and worst airlines on most routes. If the date is flexible, it is worth more than the carrier.
The two directions do not behave alike. IAH to SJC arrives on time 11.6 points more often than the outbound. Delay accumulates through the flying day, so whichever direction is scheduled later tends to carry the worse record — which is an argument for booking the morning departure if the choice exists.
This route does worse than its own airport. SJC as a whole runs 8.7 points more punctual than these flights, which points at something specific to the route — the time of day it is scheduled, or the aircraft that feed it — rather than the airport.
Only United Airlines flies this route in the published record, so there is no choice to weigh — the route's figures and the airline's are the same figures.
Which airline should you fly on this route?
Over January 2025 – August 2026, United Airlines arrived on time most often on SJC to IAH. Flights ran closest to schedule in April and worst in December.
Every airline on SJC to IAH
Ranked by how many flights each one operated. A carrier with fewer than 100 flights in the period is listed but not graded.
| Airline | Flights | On time | Cancelled | Avg delay | Grade |
|---|---|---|---|---|---|
| United Airlines | 215 | 73.02% | 0% | 63 min | C |
Month by month
Share of flights that arrived within 15 minutes of schedule, by month flown.
The return leg
IAH to SJC Houston back to San Jose 84.65% on time BOther routes from San Jose
Common questions
Are flights from San Jose to Houston usually delayed?
73.02% of flights on the SJC to IAH route arrived within 15 minutes of schedule, so roughly 3 in every ten arrived late. That is worse than the average route in this record.
Which airlines fly from San Jose to Houston?
Only United Airlines appears in the published record on this route, with 215 flights and 73.02% arriving on time.
How often are SJC to IAH flights cancelled?
0% of scheduled flights did not operate — about 1 in every thousand. That is in the normal range.
What is the best month to fly San Jose to Houston?
September, when 100% of flights arrived on time. The worst was July at 56.7%.
When SJC to IAH flights are late, how late are they?
About 63 minutes on average across the flights that arrived more than 15 minutes behind schedule.
What these figures do and do not tell you
Everything on this page is counted from the flights that actually operated on SJC to IAH during January 2025 – August 2026, as reported by the airlines to the US Bureau of Transportation Statistics. "On time" is the federal definition: arriving at the gate within 15 minutes of the scheduled time.
A route's record is a description of the past, not a forecast. Weather, air traffic control and the aircraft's earlier flights that day drive most delays, and none of them are predictable from a historical rate. What the record does tell you is whether this route runs late more often than others, and which carrier on it has the better history — which is the part you can actually act on when you book.
Cancellations are counted separately from delays because they are a different problem for a traveller: a late flight still gets you there. How the grade is calculated →