Schedule: the flights that flew on Tuesday, Sep 29, re-dated. Real flights replace these once airlines file their FAA flight plans, usually about a day ahead.
UNITED · FLIGHT UA 3883SCHEDULED · TYPICAL SCHEDULE
UA 3883 · IAB → IAD
departs 12:45 PM CT · arrives 4:36 PM ET
Forecast issued Sat 5:00 PM ET · 69h before departure
Odds over time
Arrive at IAD more than 15 minutes late?
8%chance · ±0 pts−1 pt · 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
90%
15–30 min late
<1%
30 min–1 hour late
2%
1–2 hours late
3%
Over 2 hours late
2%
Cancelled
2%
Gate arrival compared with the scheduled arrival. The ranges add up to 100%.