Schedule: a typical summer Saturday (the flights of Jul 25, 2026), re-dated. Real flights replace these once airlines file their FAA flight plans, usually about a day ahead.
DELTA · FLIGHT DL 3155
SCHEDULED · TYPICAL SCHEDULE
Saturday, October 3
DL 3155 · GPT → ATL
departs 6:30 AM CT · arrives 8:56 AM ET
Forecast issued Thu 10:00 PM ET · 34h before departure
Watch this flight
Other days
Today 7%
Fri 10/2 11%
Sat 10/3
Sun 10/4 6%
Mon 10/5 7%
Tue 10/6 6%
Wed 10/7 5%
Odds over time
Arrive at ATL more than 15 minutes late?
6%
chance · ±1 pts
−3 pts · 24h
HOW SURE WE ARE
Moderate. The odds now blend history with early weather forecasts.
Arrive 15+ late
6%
Leave 15+ late
5%
Arrive 1h+ late
3%
Cancelled
1%
MOSTLY HISTORY
WEATHER FORECASTS
LIVE
IN THE AIR
0%
5%
10%
15%
20%
4.4d
2d
Now
1d
12h
6h
Departs
Lands
Arrive at ATL more than 15 minutes late?
Calm-weather odds: 3% · changed −3 pts in 24h
−3 pts
6%
Yes 6%
No 94%
Leave GPT more than 15 minutes late?
Calm-weather odds: 3% · changed +0 pts in 24h
+0 pts
5%
Yes 5%
No 95%
Arrive at ATL more than an hour late?
Calm-weather odds: 2% · changed +0 pts in 24h
+0 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
93%
15–30 min late
<1%
30 min–1 hour late
2%
1–2 hours late
2%
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
↑
0.4 in of rain forecast at ATL that day
↑
Cloud base down to 500 ft, visibility down to 2 mi, 1.9 in of rain forecast at GPT that day
↓
Early flights usually leave on time
↓
6am departures from GPT are usually not late
Weather at each end
GPT (origin)
Gusts 15 kt Ceiling 500 ft Visibility 2 mi Precip 1.89 in
ATL (destination)
Gusts 7 kt Ceiling 3,800 ft Visibility 7 mi Precip 0.16 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.