Schedule: a typical Saturday (the flights of Jul 25, 2026, re-dated). Real flights replace these once the FAA publishes them, usually about a day ahead.
DELTA · FLIGHT DL 1273
SCHEDULED · TYPICAL SCHEDULE
Saturday, October 3
DL 1273 · ATL → GSP
departs 1:07 PM ET · arrives 2:01 PM ET
Forecast issued Wed 7:00 PM ET · 66h before departure
Watch this flight
Other days
Today 11%
Thu 10/1 13%
Fri 10/2 15%
Sat 10/3
Sun 10/4 11%
Mon 10/5 11%
Tue 10/6 8%
Odds over time
Arrive at GSP more than 15 minutes late?
19%
chance · ±5 pts
+9 pts · 24h
HOW SURE WE ARE
Moderate. The odds now blend history with early weather forecasts.
Arrive 15+ late
19%
Leave 15+ late
18%
Arrive 1h+ late
3%
Cancelled
<1%
MOSTLY HISTORY
WEATHER FORECASTS
LIVE
IN THE AIR
0%
10%
20%
30%
40%
4.6d
Now
2d
1d
12h
6h
Departs
Lands
Arrive at GSP more than 15 minutes late?
Calm-weather odds: 8% · changed +9 pts in 24h
+9 pts
19%
Yes 19%
No 81%
Leave ATL more than 15 minutes late?
Calm-weather odds: 9% · changed +9 pts in 24h
+9 pts
18%
Yes 18%
No 82%
Arrive at GSP more than an hour late?
Calm-weather odds: 2% · changed +1 pt in 24h
+1 pt
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 GSP?
On time or early
80%
15–30 min late
9%
30 min–1 hour late
6%
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%.
What’s moving the odds
↑
Cloud base down to 300 ft forecast at ATL that day
↑
Other factors
↑
Cloud base down to 700 ft forecast at GSP that day
↓
DL's recent on-time record
↓
GSP usually runs smoothly
Weather at each end
ATL (origin)
Gusts 9 kt Ceiling 300 ft Visibility 4 mi Precip 0.10 in
GSP (destination)
Gusts 12 kt Ceiling 2,300 ft Visibility 4 mi Precip 0.12 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.