About 1 in 5 B6 1333 flights from Boston arrived 15+ minutes late, diverted or cancelled over the past year (18%); 1.1% were cancelled. The typical flight landed 7 minutes early.
B6 1333: BOS → SFO
Scheduled to leave Boston at 6:35 a.m. local time. Over the past year it arrived on time 82% of the time (180 flights), in line with other B6 flights on the route at that hour (83%). Last seen in the data Aug 31, 2026.
Month by month
By day of week
| Day | Flights | On time |
|---|---|---|
| Monday | 26 | 73% |
| Tuesday | 25 | 64% |
| Wednesday | 26 | 85% |
| Thursday | 26 | 92% |
| Friday | 26 | 88% |
| Saturday | 26 | 77% |
| Sunday | 25 | 92% |
Why it was late
All flights BOS → SFO · Connecting off B6 1333? Check the risk
Questions
How often is B6 1333 from BOS to SFO late?
JetBlue 1333 from Boston, MA to San Francisco, CA arrived 15 or more minutes late, was diverted or was cancelled on 18% of 180 scheduled flights between September 2025 and August 2026. 1.1% were cancelled.
Flight numbers change. Figures cover flights with this airline, number and route only. "Likely range" is the 95% interval for the true on-time rate given the number of flights. This is history, not live status: check JetBlue for today's flight. Method.