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.
DELTA · FLIGHT DL 663SCHEDULED · TYPICAL SCHEDULE
Today
DL 663 · ATL → SLC
departs 11:56 AM ET · arrives 1:50 PM MT
Forecast issued Fri 5:00 PM ET · 5h after departure
Odds over time
Arrive at SLC more than 15 minutes late?
12%chance · ±0 pts−3 pts · 24h
HOW SURE WE AREVery high. The odds now come almost entirely from live conditions.
How late will it get to SLC?
On time or early
88%
15–30 min late
4%
30 min–1 hour late
6%
1–2 hours late
1%
Over 2 hours late
<1%
Cancelled
<1%
Gate arrival compared with the scheduled arrival. The ranges add up to 100%.