Schedule: a typical summer Monday (the flights of Jul 27, 2026), re-dated. Real flights replace these once airlines file their FAA flight plans, usually about a day ahead.
UNITED · FLIGHT UA 2400SCHEDULED · TYPICAL SCHEDULE
UA 2400 · BOS → SFO
departs 6:10 PM ET · arrives 9:47 PM PT
Forecast issued Sat 12:00 PM ET · 54h before departure
Odds over time
Arrive at SFO more than 15 minutes late?
22%chance · ±4 pts– · 24h
HOW SURE WE AREModerate. The odds now blend history with early weather forecasts.
How late will it get to SFO?
On time or early
78%
15–30 min late
8%
30 min–1 hour late
6%
1–2 hours late
6%
Over 2 hours late
2%
Cancelled
<1%
Gate arrival compared with the scheduled arrival. The ranges add up to 100%.