Schedule: a typical Saturday (the flights of Jul 25, 2026, re-dated). Real flights replace these once the FAA publishes them, usually about a day ahead.
UNITED · FLIGHT UA 1434SCHEDULED · TYPICAL SCHEDULE
UA 1434 · JAX → IAD
departs 9:20 AM ET · arrives 11:16 AM ET
Forecast issued Thu 8:00 PM ET · 37h 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
3%
1–2 hours late
3%
Over 2 hours late
2%
Cancelled
<1%
Gate arrival compared with the scheduled arrival. The ranges add up to 100%.