Schedule: a typical Sunday (the flights of Jul 26, 2026, re-dated). Real flights replace these once the FAA publishes them, usually about a day ahead.
DELTA · FLIGHT DL 1561SCHEDULED · TYPICAL ODDS
DL 1561 · DTW → GSP
departs 8:05 PM ET · arrives 9:47 PM ET
Forecast issued Mon 10:00 PM ET · 142h before departure
Typical odds
Too early for a weather forecast — these are typical odds for this flight on a Sunday in October, from the weather this date has had in past years (the range shows how much they varied). They’ll switch to forecast-based odds about 3 days before departure.
Odds over time
Arrive at GSP more than 15 minutes late?
21%chance · ±3 pts– · 24h
HOW SURE WE ARELow. This is mostly a starting point from history; weather forecasts haven't kicked in yet.
How late will it get to GSP?
On time or early
78%
15 min–1 hour late
16%
Over 1 hour late
5%
Cancelled
<1%
Gate arrival compared with the scheduled arrival. The ranges add up to 100%.