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 1398 SCHEDULED · 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 ARE Moderate. The odds now blend history with early weather forecasts.
WEATHER FORECASTS LIVE IN THE AIR 0% 20% 40% 60% 80% 2.9d 2d Now 1d 12h 6h Departs Lands

How late will it get to ORD?

  1. On time or early
    45%
  2. 15–30 min late
    14%
  3. 30 min–1 hour late
    14%
  4. 1–2 hours late
    6%
  5. Over 2 hours late
    16%
  6. Cancelled
    5%

Gate arrival compared with the scheduled arrival. The ranges add up to 100%.