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 1478SCHEDULED · TYPICAL SCHEDULE
Tomorrow
UA 1478 · IAH → IAD
departs 2:31 PM CT · arrives 6:50 PM ET
Forecast issued Fri 4:00 AM ET · 36h before departure
Odds over time
Arrive at IAD more than 15 minutes late?
17%chance · ±2 pts−8 pts · 24h
HOW SURE WE AREModerate. The odds now blend history with early weather forecasts.
How late will it get to IAD?
On time or early
82%
15–30 min late
<1%
30 min–1 hour late
11%
1–2 hours late
3%
Over 2 hours late
3%
Cancelled
<1%
Gate arrival compared with the scheduled arrival. The ranges add up to 100%.