BOS to SJC flight delays
Boston, MA (BOS) San Jose, CA (SJC) · 2,689 miles
71 flights · July 2024 – July 2026 · US Bureau of Transportation Statistics
50.7%
Arrived on time
Within 15 minutes of schedule
0%
Cancelled
Share of scheduled flights
70 min
When late, late by
Average across delayed arrivals
37 min
Delay per flight
Averaged over every flight flown
What the record says about this route
Flights from Boston to San Jose arrive late more often than they arrive on time. At this rate lateness is the normal outcome, not the exception, and the schedule is better read as an aspiration than a plan.
The two directions do not behave alike. SJC to BOS arrives on time 18.9 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. BOS as a whole runs 27.7 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.
Every airline on BOS to SJC
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 |
|---|---|---|---|---|---|
| JetBlue Airways | 65 | 47.69% | 0% | 70 min | — |
| American Airlines | 3 | 66.67% | 0% | 70 min | — |
| Southwest Airlines | 2 | 100% | 0% | — | — |
| United Airlines | 1 | 100% | 0% | — | — |
Month by month
Share of flights that arrived within 15 minutes of schedule, by month flown.
The return leg
SJC to BOS San Jose back to Boston 69.57% on time —Other routes from Boston
Common questions
Are flights from Boston to San Jose usually delayed?
50.7% of flights on the BOS to SJC route arrived within 15 minutes of schedule, so roughly 5 in every ten arrived late. That is worse than the average route in this record.
How often are BOS to SJC flights cancelled?
0% of scheduled flights did not operate — about 1 in every thousand. That is in the normal range.
When BOS to SJC flights are late, how late are they?
About 70 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 BOS to SJC during July 2024 – July 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 →