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 641SCHEDULED · TYPICAL SCHEDULE
UA 641 · ATL → IAD
departs 5:30 AM ET · arrives 7:20 AM ET
Forecast issued Fri 5:00 PM ET · 60h before departure
Odds over time
Arrive at IAD more than 15 minutes late?
8%chance · ±1 pts+2 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
92%
15–30 min late
0%
30 min–1 hour late
5%
1–2 hours late
<1%
Over 2 hours late
2%
Cancelled
<1%
Gate arrival compared with the scheduled arrival. The ranges add up to 100%.