Schedule: a typical summer Saturday (the flights of Jul 25, 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 2:53 PM PT · arrives 8:15 PM CT
Forecast issued Thu 11:00 PM ET · 43h before departure
Odds over time
Arrive at IAH more than 15 minutes late?
23%chance · ±4 pts−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
76%
15–30 min late
9%
30 min–1 hour late
6%
1–2 hours late
4%
Over 2 hours late
3%
Cancelled
<1%
Gate arrival compared with the scheduled arrival. The ranges add up to 100%.