Schedule: a typical Thursday (the flights of Jul 30, 2026, re-dated). Real flights replace these once the FAA publishes them, usually about a day ahead.
JETBLUE · FLIGHT B6 398
SCHEDULED · TYPICAL SCHEDULE
Thursday, October 1
B6 398 · SEA → BOS
departs 11:45 AM PT · arrives 8:13 PM ET
Forecast issued Tue 6:00 PM ET · 45h before departure
Watch this flight
Other days
Today 38%
Wed 9/30 41%
Thu 10/1
Fri 10/2 47%
Sat 10/3 40%
Sun 10/4 55%
Mon 10/5 52%
Odds over time
Arrive at BOS more than 15 minutes late?
44%
chance · ±1 pts
+2 pts · 24h
HOW SURE WE ARE
Moderate. The odds now blend history with early weather forecasts.
Arrive 15+ late
44%
Leave 15+ late
38%
Arrive 1h+ late
13%
Cancelled
<1%
WEATHER FORECASTS
LIVE
IN THE AIR
0%
15%
30%
45%
60%
2.7d
Now
1d
12h
6h
Departs
Lands
Arrive at BOS more than 15 minutes late?
Calm-weather odds: 41% · changed +2 pts in 24h
+2 pts
44%
Yes 44%
No 56%
Leave SEA more than 15 minutes late?
Calm-weather odds: 28% · changed −4 pts in 24h
−4 pts
38%
Yes 38%
No 62%
Arrive at BOS more than an hour late?
Calm-weather odds: 12% · changed −3 pts in 24h
−3 pts
13%
Yes 13%
No 87%
Cancelled?
Calm-weather odds: <1% · changed +0 pts in 24h
+0 pts
<1%
Yes <1%
No 99%
How late will it get to BOS?
On time or early
56%
15–30 min late
17%
30 min–1 hour late
14%
1–2 hours late
8%
Over 2 hours late
6%
Cancelled
<1%
Gate arrival compared with the scheduled arrival. The ranges add up to 100%.
What’s moving the odds
↑
This flight has been late 41% of the time recently
↑
B6's recent on-time record
↑
11am departures from SEA are often late
↓
Mostly benign weather forecast at SEA
↓
Visibility down to 2 mi forecast at BOS that day
Weather at each end
SEA (origin)
Gusts 7 kt Ceiling 3,900 ft Visibility 9 mi Precip none
BOS (destination)
Gusts 16 kt Ceiling 10,000 ft Visibility 2 mi Precip none
How this resolves
Yes if the gate arrival is more than 15 minutes after the scheduled arrival. Cancelled or diverted flights resolve N/A.
Every question here is display only — there is no betting or money involved. Gate times come from the airline; a cancellation resolves only the “Cancelled?” question, and a diversion voids the delay questions.