Schedule: a typical summer Friday (the flights of Jul 31, 2026), re-dated. Real flights replace these once airlines file their FAA flight plans, usually about a day ahead.
UNITED · FLIGHT UA 688SCHEDULED · TYPICAL SCHEDULE
Yesterday
UA 688 · MCI → IAD
departs 12:30 PM CT · arrives 4:03 PM ET
Forecast issued Fri 10:00 PM ET · 8h after departure
Odds over time
Arrive at IAD more than 15 minutes late?
14%chance · ±0 pts+1 pt · 24h
HOW SURE WE AREVery high. The odds now come almost entirely from live conditions.
How late will it get to IAD?
On time or early
85%
15–30 min late
6%
30 min–1 hour late
2%
1–2 hours late
3%
Over 2 hours late
3%
Cancelled
<1%
Gate arrival compared with the scheduled arrival. The ranges add up to 100%.