Schedule: a typical summer Sunday (the flights of Jul 26, 2026), re-dated. Real flights replace these once airlines file their FAA flight plans, usually about a day ahead.
DELTA · FLIGHT DL 1255
SCHEDULED · TYPICAL SCHEDULE
Sunday, October 4
DL 1255 · MDT → ATL
departs 6:04 AM ET · arrives 8:02 AM ET
Forecast issued Fri 7:00 AM ET · 47h before departure
Watch this flight
Other days
Today 7%
Sat 10/3 9%
Sun 10/4
Mon 10/5 7%
Tue 10/6 7%
Wed 10/7 6%
Thu 10/8 6%
Odds over time
Arrive at ATL more than 15 minutes late?
11%
chance · ±3 pts
+2 pts · 24h
HOW SURE WE ARE
Moderate. The odds now blend history with early weather forecasts.
Arrive 15+ late
11%
Leave 15+ late
7%
Arrive 1h+ late
3%
Cancelled
2%
MOSTLY HISTORY
WEATHER FORECASTS
LIVE
IN THE AIR
0%
5%
10%
15%
20%
5.3d
Now
1d
12h
6h
Departs
Lands
Arrive at ATL more than 15 minutes late?
Calm-weather odds: 5% · changed +2 pts in 24h
+2 pts
11%
Yes 11%
No 89%
Leave MDT more than 15 minutes late?
Calm-weather odds: 6% · changed +0 pts in 24h
+0 pts
7%
Yes 7%
No 93%
Arrive at ATL more than an hour late?
Calm-weather odds: 3% · changed −1 pt in 24h
−1 pt
3%
Yes 3%
No 97%
Cancelled?
Calm-weather odds: <1% · changed +1 pt in 24h
+1 pt
2%
Yes 2%
No 98%
How late will it get to ATL?
On time or early
87%
15–30 min late
6%
30 min–1 hour late
2%
1–2 hours late
<1%
Over 2 hours late
2%
Cancelled
2%
Gate arrival compared with the scheduled arrival. The ranges add up to 100%.
What’s moving the odds
↑
Cloud base down to 300 ft, visibility down to 1 mi, 1.8 in of rain forecast at ATL that day
↑
ATL is busy at that time
↓
Early flights usually leave on time
↓
6am departures from MDT are usually not late
Weather at each end
MDT (origin)
Gusts 11 kt Ceiling 700 ft Visibility 1 mi Precip 0.14 in
ATL (destination)
Gusts 9 kt Ceiling 300 ft Visibility 1 mi Precip 1.80 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.