SJC to BOI flight delays
San Jose, CA (SJC) Boise, ID (BOI) · 523 miles
59 flights · March 2025 – August 2026 · US Bureau of Transportation Statistics
64.41%
Arrived on time
Within 15 minutes of schedule
0%
Cancelled
Share of scheduled flights
41 min
When late, late by
Average across delayed arrivals
16 min
Delay per flight
Averaged over every flight flown
What the record says about this route
The two directions do not behave alike. BOI to SJC arrives on time 20.1 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 is a late route. Flights from San Jose to Boise miss their scheduled arrival often enough that a tight connection at the far end is a connection at risk.
This route does worse than its own airport. SJC as a whole runs 8.8 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.
Every airline on SJC to BOI
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 |
|---|---|---|---|---|---|
| SkyWest Airlines | 31 | 87.1% | 0% | 41 min | — |
| Southwest Airlines | 28 | 39.29% | 0% | 41 min | — |
The return leg
BOI to SJC Boise back to San Jose 84.48% on time —Other routes from San Jose
Common questions
Are flights from San Jose to Boise usually delayed?
64.41% of flights on the SJC to BOI route arrived within 15 minutes of schedule, so roughly 4 in every ten arrived late. That is worse than the average route in this record.
How often are SJC to BOI flights cancelled?
0% of scheduled flights did not operate — about 1 in every thousand. That is in the normal range.
When SJC to BOI flights are late, how late are they?
About 41 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 BOI during March 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 →