Schedule: a typical summer Sunday (the flights of Jul 26, 2026), re-dated. Real flights replace these once airlines file their FAA flight plans, usually about a day ahead.
UNITED · FLIGHT UA 498SCHEDULED · TYPICAL SCHEDULE
UA 498 · PDX → IAD
departs 11:30 PM PT · arrives 7:32 AM ET
Forecast issued Fri 4:00 PM ET · 58h before departure
Odds over time
Arrive at IAD more than 15 minutes late?
11%chance · ±0 pts– · 24h
HOW SURE WE AREModerate. The odds now blend history with early weather forecasts.
How late will it get to IAD?
On time or early
88%
15–30 min late
5%
30 min–1 hour late
3%
1–2 hours late
2%
Over 2 hours late
<1%
Cancelled
<1%
Gate arrival compared with the scheduled arrival. The ranges add up to 100%.