Schedule: the flights that flew on Wednesday, Oct 7, re-dated. Real flights replace these once airlines file their FAA flight plans, usually about a day ahead.
UNITED · FLIGHT UA 939SCHEDULED · TYPICAL SCHEDULE
UA 939 · LHR → SFO
departs 4:10 PM BST · arrives 6:58 PM PT
Forecast issued Mon 3:00 PM ET · 44h before departure
Odds over time
Arrive at SFO more than 15 minutes late?
14%chance · ±2 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
85%
15–30 min late
5%
30 min–1 hour late
5%
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%.