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 1561
SCHEDULED · TYPICAL SCHEDULE
Friday, October 2 Today
DL 1561 · DTW → GSP
departs 8:05 PM ET · arrives 9:47 PM ET
Forecast issued Fri 2:00 AM ET · 18h before departure
Watch this flight
Other days
Today
Sat 10/3 15%
Sun 10/4 21%
Mon 10/5 18%
Tue 10/6 16%
Wed 10/7 15%
Thu 10/8 16%
Odds over time
Arrive at GSP more than 15 minutes late?
28%
chance · ±4 pts
+5 pts · 24h
HOW SURE WE ARE
Good. The odds now lean mostly on firmed-up weather forecasts.
Arrive 15+ late
28%
Leave 15+ late
23%
Arrive 1h+ late
7%
Cancelled
<1%
WEATHER FORECASTS
LIVE
IN THE AIR
0%
10%
20%
30%
40%
3.9d
2d
1d
Now
12h
6h
Departs
Lands
Arrive at GSP more than 15 minutes late?
Calm-weather odds: 23% · changed +5 pts in 24h
+5 pts
28%
Yes 28%
No 72%
Leave DTW more than 15 minutes late?
Calm-weather odds: 23% · changed +0 pts in 24h
+0 pts
23%
Yes 23%
No 77%
Arrive at GSP more than an hour late?
Calm-weather odds: 6% · changed +0 pts in 24h
+0 pts
7%
Yes 7%
No 93%
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
72%
15–30 min late
8%
30 min–1 hour late
13%
1–2 hours late
5%
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
↑
Later flights pick up delays from earlier in the day
↑
8pm departures from DTW are often late
↑
Arrivals into GSP at that hour are often late
↓
DTW usually runs smoothly
↓
Fridays in October are usually quieter than average
Weather at each end
DTW (origin)
Gusts 27 kt Ceiling 1,800 ft Visibility 1.5 mi Precip 2.43 in
GSP (destination)
Gusts 13 kt Ceiling none (clear) Visibility 10+ mi Precip 0.01 in
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.