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 660SCHEDULED · TYPICAL SCHEDULE
UA 660 · PHL → ORD
departs 6:00 AM ET · arrives 7:30 AM CT
Forecast issued Thu 2:00 PM ET · 40h before departure
Odds over time
Arrive at ORD more than 15 minutes late?
5%chance · ±0 pts+1 pt · 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
94%
15–30 min late
<1%
30 min–1 hour late
3%
1–2 hours late
<1%
Over 2 hours late
2%
Cancelled
<1%
Gate arrival compared with the scheduled arrival. The ranges add up to 100%.