Schedule: a typical Thursday (the flights of Jul 30, 2026, re-dated). Real flights replace these once the FAA publishes them, usually about a day ahead.
DELTA · FLIGHT DL 1561
SCHEDULED · TYPICAL SCHEDULE
Thursday, October 1 Tomorrow
DL 1561 · DTW → GSP
departs 8:05 PM ET · arrives 9:47 PM ET
Forecast issued Wed 12:00 AM ET · 44h before departure
Watch this flight
Other days
Today 27%
Thu 10/1
Fri 10/2 19%
Sat 10/3 14%
Sun 10/4 21%
Mon 10/5 18%
Tue 10/6 16%
Odds over time
Arrive at GSP more than 15 minutes late?
31%
chance · ±3 pts
+8 pts · 24h
HOW SURE WE ARE
Moderate. The odds now blend history with early weather forecasts.
Arrive 15+ late
31%
Leave 15+ late
27%
Arrive 1h+ late
6%
Cancelled
<1%
WEATHER FORECASTS
LIVE
IN THE AIR
0%
15%
30%
45%
60%
2.9d
Now
1d
12h
6h
Departs
Lands
Arrive at GSP more than 15 minutes late?
Calm-weather odds: 18% · changed +8 pts in 24h
+8 pts
31%
Yes 31%
No 69%
Leave DTW more than 15 minutes late?
Calm-weather odds: 22% · changed +2 pts in 24h
+2 pts
27%
Yes 27%
No 73%
Arrive at GSP more than an hour late?
Calm-weather odds: 4% · changed +1 pt in 24h
+1 pt
6%
Yes 6%
No 94%
Cancelled?
Calm-weather odds: <1% · changed +0 pts in 24h
+0 pts
<1%
Yes <1%
No 99%
How late will it get to GSP?
On time or early
68%
15–30 min late
12%
30 min–1 hour late
12%
1–2 hours late
4%
Over 2 hours late
2%
Cancelled
<1%
Gate arrival compared with the scheduled arrival. The ranges add up to 100%.
What’s moving the odds
↑
Mostly benign weather forecast at DTW
↑
8pm departures from DTW are often late
↑
Later flights pick up delays from earlier in the day
↓
Mostly benign weather forecast at GSP
↓
DTW usually runs smoothly
Weather at each end
DTW (origin)
Gusts 15 kt Ceiling 5,000 ft Visibility 7 mi Precip 0.16 in
GSP (destination)
Gusts 9 kt Ceiling none (clear) Visibility 10+ mi Precip none
How this resolves
Yes if the gate arrival is more than 15 minutes after the scheduled arrival. Cancelled or diverted flights resolve N/A.
Every question here is display only — there is no betting or money involved. Gate times come from the airline; a cancellation resolves only the “Cancelled?” question, and a diversion voids the delay questions.