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.
DELTA · FLIGHT DL 473SCHEDULED · TYPICAL SCHEDULE
Tomorrow
DL 473 · SEA → BOS
departs 11:15 PM PT · arrives 7:35 AM ET
Forecast issued Wed 1:00 PM ET · 37h before departure
Odds over time
Arrive at BOS more than 15 minutes late?
22%chance · ±3 pts+1 pt · 24h
HOW SURE WE AREModerate. The odds now blend history with early weather forecasts.
How late will it get to BOS?
On time or early
78%
15–30 min late
14%
30 min–1 hour late
4%
1–2 hours late
2%
Over 2 hours late
2%
Cancelled
<1%
Gate arrival compared with the scheduled arrival. The ranges add up to 100%.