About 1 in 2 B6 640 flights from Cleveland arrived 15+ minutes late, diverted or cancelled over the past year (41%); 4.2% were cancelled. The typical flight landed 4 minutes early.
B6 640: CLE → BOS
Scheduled to leave Cleveland at 11:35 a.m. local time. Over the past year it arrived on time 59% of the time (287 flights), better than other B6 flights on the route at that hour (43%). Last seen in the data Aug 31, 2026.
Usually JetBlue's last flight of the day from Cleveland to Boston (71% of days). JetBlue's last CLE–BOS flight was cancelled 4.0% of the time, against 3.3% for its earlier ones. If it's cancelled, the next JetBlue flight is usually around 10:07 a.m. the next morning.
Month by month
By day of week
| Day | Flights | On time |
|---|---|---|
| Monday | 43 | 49% |
| Tuesday | 36 | 61% |
| Wednesday | 36 | 64% |
| Thursday | 42 | 57% |
| Friday | 42 | 57% |
| Saturday | 46 | 76% |
| Sunday | 42 | 45% |
Why it was late
All flights CLE → BOS · Connecting off B6 640? Check the risk
Questions
How often is B6 640 from CLE to BOS late?
JetBlue 640 from Cleveland, OH to Boston, MA arrived 15 or more minutes late, was diverted or was cancelled on 41% of 287 scheduled flights between September 2025 and August 2026. 4.2% 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.