Schedule: the flights that flew on Wednesday, Nov 4, re-dated. Real flights replace these once airlines file their FAA flight plans, usually about a day ahead.
UNITED · FLIGHT UA 1637SCHEDULED · TYPICAL SCHEDULE
UA 1637 · IAD → PHX
departs 12:54 PM ET · arrives 3:55 PM MT
Forecast issued Mon 4:00 PM ET · 45h before departure
Odds over time
Arrive at PHX more than 15 minutes late?
10%chance · ±2 pts+1 pt · 24h
HOW SURE WE AREModerate. The odds now blend history with early weather forecasts.
How late will it get to PHX?
On time or early
90%
15–30 min late
2%
30 min–1 hour late
3%
1–2 hours late
3%
Over 2 hours late
2%
Cancelled
<1%
Gate arrival compared with the scheduled arrival. The ranges add up to 100%.