Schedule: a typical Wednesday (the flights of Jul 29, 2026, re-dated). Real flights replace these once the FAA publishes them, usually about a day ahead.
DELTA · FLIGHT DL 878SCHEDULED · TYPICAL SCHEDULE
Today
DL 878 · SMF → ATL
departs 10:00 PM PT · arrives 5:31 AM ET
Forecast issued Wed 12:00 PM ET · 13h before departure
Odds over time
Arrive at ATL more than 15 minutes late?
10%chance · ±0 pts+4 pts · 24h
HOW SURE WE AREGood. The odds now lean mostly on firmed-up weather forecasts.
How late will it get to ATL?
On time or early
90%
15–30 min late
4%
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%.