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 645SCHEDULED · TYPICAL SCHEDULE
UA 645 · DEN → FSD
departs 5:28 PM MT · arrives 8:08 PM CT
Forecast issued Thu 7:00 PM ET · 48h before departure
Odds over time
Arrive at FSD more than 15 minutes late?
22%chance · ±6 pts+1 pt · 24h
HOW SURE WE AREModerate. The odds now blend history with early weather forecasts.
How late will it get to FSD?
On time or early
78%
15–30 min late
12%
30 min–1 hour late
2%
1–2 hours late
6%
Over 2 hours late
2%
Cancelled
<1%
Gate arrival compared with the scheduled arrival. The ranges add up to 100%.