Schedule: a typical Friday (the flights of Jul 31, 2026, re-dated). Real flights replace these once the FAA publishes them, usually about a day ahead.

DELTA · FLIGHT DL 1403 SCHEDULED · TYPICAL SCHEDULE

Friday, October 2

DL 1403 · ATL → STL

departs 11:10 PM ET · arrives 11:53 PM CT

Forecast issued Wed 10:00 PM ET · 49h before departure

Arrive at STL more than 15 minutes late?

22% chance · ±5 pts −1 pt · 24h

HOW SURE WE ARE Moderate. The odds now blend history with early weather forecasts.

How late will it get to STL?

On time or early
77%
15–30 min late
11%
30 min–1 hour late
5%
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

↑ Later flights pick up delays from earlier in the day

↑ 11pm departures from ATL are often late

↑ Arrivals into STL at that hour are often late

↓ ATL usually runs smoothly

↓ Fridays in October are usually quieter than average

Weather at each end

ATL (origin) Gusts11 kt Ceiling2,300 ft Visibility10+ mi Precipnone

STL (destination) Gusts19 kt Ceiling700 ft Visibility5 mi Precip0.62 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.

DL 1403 · ATL → STL

Odds over time

How late will it get to STL?