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 1398SCHEDULED · TYPICAL SCHEDULE
Tomorrow
UA 1398 · COS → ORD
departs 12:11 PM MT · arrives 3:56 PM CT
Forecast issued Wed 11:00 AM ET · 27h before departure
Odds over time
Arrive at ORD more than 15 minutes late?
52%chance · ±15 pts+3 pts · 24h
HOW SURE WE AREModerate. The odds now blend history with early weather forecasts.
How late will it get to ORD?
On time or early
45%
15–30 min late
14%
30 min–1 hour late
14%
1–2 hours late
6%
Over 2 hours late
16%
Cancelled
5%
Gate arrival compared with the scheduled arrival. The ranges add up to 100%.