No delays reported for B6 398 (SEA → BOS) as of 6:45 PM ET. It arrived on time 27.8% of the time in June-August 2026. When it was late, the average delay was 1h 14m. 2.2% of flights were cancelled. Right now there are no reported delays at SEA, BOS.
Looks on time
Should be in the air from SEA, scheduled to land at BOS at 8:13 PM local time.
Cancellation risk: Low 2.2% of its flights were cancelled in June-August 2026.
Estimate from the schedule, live position and airport conditions, if this flight operates today. Check JetBlue for official times.
Before you fly
Some links are affiliate links.
Route and schedule
| Leg | Scheduled | On time |
|---|---|---|
| SEA → BOS Seattle, WA to Boston, MA | 11:45 AM → 8:13 PM | 28% |
Local times. Schedules change; check your booking.
How reliable is B6 398?
| Arrived on time (within 15 min) | 27.8% |
| Average delay when late | 74 min |
| Cancelled | 2.2% |
| Diverted | 0% |
| Flights tracked | 92 |
Best and worst days to fly B6 398
B6 398 was most reliable on Saturdays (46% on time) and least reliable on Wednesdays (15%).
| Monday | |
| Tuesday | |
| Wednesday | |
| Thursday | |
| Friday | |
| Saturday | |
| Sunday |
Why it runs late
| Late-arriving plane | |
| Airline (crew, maintenance) | |
| Air traffic system | |
| Extreme weather |
Share of delay minutes by cause, as reported by JetBlue to the Department of Transportation.
Other flights SEA → BOS
All flights on this route, ranked
Live status at its airports
We show airport-wide airport status, not this flight's gate or live position. For that, check the JetBlue app.
JetBlue delays and what you're owed · Airline phone numbers
About this data
On-time history: U.S. Bureau of Transportation Statistics, Reporting Carrier On-Time Performance, June-August 2026. Live conditions: live airport status. "On time" means arriving within 15 minutes of schedule.
Common questions
Is B6 398 delayed today?
Right now there are no reported delays at SEA, BOS. Checked 6:45 PM ET. For this flight's gate and exact status, check the JetBlue app.
Is B6 398 usually on time?
B6 398 arrived within 15 minutes of schedule 27.8% of the time in June-August 2026, with an average delay of 74 minutes when late.
How often is B6 398 cancelled?
2.2% of B6 398 flights were cancelled in June-August 2026.