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 1403
SCHEDULED · TYPICAL SCHEDULE
Thursday, October 1 Tomorrow
DL 1403 · ATL → STL
departs 11:10 PM ET · arrives 11:53 PM CT
Forecast issued Wed 5:00 PM ET · 30h before departure
Watch this flight
Other days
Today 20%
Thu 10/1
Fri 10/2 24%
Sat 10/3 11%
Sun 10/4 18%
Mon 10/5 17%
Tue 10/6 12%
Odds over time
Arrive at STL more than 15 minutes late?
18%
chance · ±5 pts
+3 pts · 24h
HOW SURE WE ARE
Moderate. The odds now blend history with early weather forecasts.
Arrive 15+ late
18%
Leave 15+ late
22%
Arrive 1h+ late
7%
Cancelled
<1%
WEATHER FORECASTS
LIVE
IN THE AIR
0%
10%
20%
30%
40%
2.9d
2d
Now
1d
12h
6h
Departs
Lands
Arrive at STL more than 15 minutes late?
Calm-weather odds: 16% · changed +3 pts in 24h
+3 pts
18%
Yes 18%
No 82%
Leave ATL more than 15 minutes late?
Calm-weather odds: 16% · changed +4 pts in 24h
+4 pts
22%
Yes 22%
No 78%
Arrive at STL more than an hour late?
Calm-weather odds: 3% · changed +2 pts in 24h
+2 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 STL?
On time or early
81%
15–30 min late
5%
30 min–1 hour late
6%
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
↑
Cloud base down to 967 ft, 0.3 in of rain forecast at STL that day
↑
Later flights pick up delays from earlier in the day
↑
11pm departures from ATL are often late
↓
Mostly benign weather forecast at ATL
↓
STL usually runs smoothly
Weather at each end
ATL (origin)
Gusts 13 kt Ceiling none (clear) Visibility 10+ mi Precip none
STL (destination)
Gusts 17 kt Ceiling 967 ft Visibility 6 mi Precip 0.32 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.