Schedule: a typical Friday (the flights of Jul 31, 2026, re-dated). Real flights replace these once the FAA publishes them, usually about a day ahead.
ALASKA · FLIGHT AS 306
SCHEDULED · TYPICAL SCHEDULE
AS 306 · SEA → BOS
departs 8:23 AM PT · arrives 4:53 PM ET
Forecast issued Wed 11:00 AM ET · 48h before departure
Odds over time
Arrive at BOS more than 15 minutes late?
30%
chance · ±4 pts
– · 24h
HOW SURE WE ARE
Moderate. The odds now blend history with early weather forecasts.
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How late will it get to BOS?
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On time or early
70%
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15–30 min late
16%
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30 min–1 hour late
6%
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1–2 hours late
6%
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Over 2 hours late
2%
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Cancelled
<1%
Gate arrival compared with the scheduled arrival. The ranges add up to 100%.