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 1021
SCHEDULED · TYPICAL SCHEDULE
Friday, October 2
DL 1021 · GSP → ATL
departs 7:44 PM ET · arrives 9:04 PM ET
Forecast issued Fri 10:00 PM ET · 2h after departure
Watch this flight
Other days
Fri 10/2
Today 31%
Mon 10/5 9%
Fri 10/9 14%
Odds over time
Arrive at ATL more than 15 minutes late?
13%
chance · ±0 pts
−3 pts · 24h
HOW SURE WE ARE
Very high. The odds now come almost entirely from live conditions.
Arrive 15+ late
13%
Leave 15+ late
16%
Arrive 1h+ late
3%
Cancelled
<1%
WEATHER FORECASTS
LIVE
IN THE AIR
0%
15%
30%
45%
60%
3.9d
2d
1d
12h
6h
Departs
Lands
Now
Arrive at ATL more than 15 minutes late?
Calm-weather odds: 13% · changed −3 pts in 24h
−3 pts
13%
Yes 13%
No 87%
Leave GSP more than 15 minutes late?
Calm-weather odds: 16% · changed −2 pts in 24h
−2 pts
16%
Yes 16%
No 84%
Arrive at ATL more than an hour late?
Calm-weather odds: 3% · changed −3 pts in 24h
−3 pts
3%
Yes 3%
No 97%
Cancelled?
Calm-weather odds: <1% · changed +0 pts in 24h
+0 pts
<1%
Yes <1%
No 99%
How late will it get to ATL?
On time or early
87%
15–30 min late
4%
30 min–1 hour late
6%
1–2 hours late
1%
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
↑
Arrivals into ATL at that hour are often late
↑
Later flights pick up delays from earlier in the day
↑
7pm departures from GSP are often late
↓
Cloud base down to 600 ft forecast at ATL that day
↓
ATL usually runs smoothly
Weather at each end
GSP (origin)
Gusts 14 kt Ceiling 5,500 ft Visibility 10+ mi Precip none
ATL (destination)
Gusts 8 kt Ceiling 600 ft Visibility 5 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.