Schedule: a typical summer Sunday (the flights of Jul 26, 2026), re-dated. Real flights replace these once airlines file their FAA flight plans, usually about a day ahead.
UNITED · FLIGHT UA 643SCHEDULED · TYPICAL SCHEDULE
UA 643 · SNA → IAH
departs 3:05 PM PT · arrives 8:27 PM CT
Forecast issued Fri 12:00 AM ET · 66h before departure
Odds over time
Arrive at IAH more than 15 minutes late?
27%chance · ±2 pts– · 24h
HOW SURE WE AREModerate. The odds now blend history with early weather forecasts.
How late will it get to IAH?
On time or early
72%
15–30 min late
12%
30 min–1 hour late
5%
1–2 hours late
6%
Over 2 hours late
4%
Cancelled
1%
Gate arrival compared with the scheduled arrival. The ranges add up to 100%.