Schedule: a typical Thursday (the flights of Jul 30, 2026, re-dated). Real flights replace these once the FAA publishes them, usually about a day ahead.
UNITED · FLIGHT UA 2129SCHEDULED · TYPICAL SCHEDULE
Today
UA 2129 · SAN → IAD
departs 9:59 PM PT · arrives 5:59 AM ET
Forecast issued Thu 2:00 AM ET · 23h before departure
Odds over time
Arrive at IAD more than 15 minutes late?
23%chance · ±2 pts+9 pts · 24h
HOW SURE WE AREGood. The odds now lean mostly on firmed-up weather forecasts.
How late will it get to IAD?
On time or early
76%
15–30 min late
9%
30 min–1 hour late
8%
1–2 hours late
5%
Over 2 hours late
1%
Cancelled
<1%
Gate arrival compared with the scheduled arrival. The ranges add up to 100%.