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 2101SCHEDULED · TYPICAL SCHEDULE
Tomorrow
UA 2101 · IAD → SEA
departs 9:00 AM ET · arrives 11:51 AM PT
Forecast issued Sat 12:00 AM ET · 33h before departure
Odds over time
Arrive at SEA more than 15 minutes late?
7%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 SEA?
On time or early
92%
15–30 min late
<1%
30 min–1 hour late
2%
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%.