About 1 in 4 B6 21 flights from Boston arrived 15+ minutes late, diverted or cancelled over the past year (28%); 2.2% were cancelled. The typical flight landed 6 minutes early.
B6 21: BOS → PBI
Scheduled to leave Boston at 7:00 a.m. local time. Over the past year it arrived on time 72% of the time (231 flights), worse than other B6 flights on the route at that hour (76%). Last seen in the data Jul 31, 2026.
Month by month
By day of week
| Day | Flights | On time |
|---|---|---|
| Monday | 32 | 66% |
| Tuesday | 30 | 73% |
| Wednesday | 31 | 84% |
| Thursday | 34 | 74% |
| Friday | 35 | 80% |
| Saturday | 35 | 71% |
| Sunday | 34 | 59% |
Why it was late
All flights BOS → PBI · Connecting off B6 21? Check the risk
Questions
How often is B6 21 from BOS to PBI late?
JetBlue 21 from Boston, MA to West Palm Beach/Palm Beach, FL arrived 15 or more minutes late, was diverted or was cancelled on 28% of 231 scheduled flights between September 2025 and August 2026. 2.2% 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.