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 1255
SCHEDULED · TYPICAL SCHEDULE
Saturday, October 3
DL 1255 · MDT → ATL
departs 6:36 AM ET · arrives 8:35 AM ET
Forecast issued Thu 6:00 PM ET · 37h before departure
Watch this flight
Other days
Today 8%
Fri 10/2 14%
Sat 10/3
Sun 10/4 7%
Mon 10/5 7%
Tue 10/6 7%
Wed 10/7 6%
Odds over time
Arrive at ATL more than 15 minutes late?
11%
chance · ±2 pts
−1 pt · 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
1%
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: 6% · changed −1 pt in 24h
−1 pt
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: 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
88%
15–30 min late
4%
30 min–1 hour late
4%
1–2 hours late
<1%
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
↑
MDT is prone to delays
↑
ATL is busy at that time
↓
Early flights usually leave on time
↓
DL's recent on-time record
Weather at each end
MDT (origin)
Gusts 12 kt
Ceiling 8,667 ft
Visibility 10+ mi
Precip 0.02 in
ATL (destination)
Gusts 8 kt
Ceiling 3,800 ft
Visibility 4 mi
Precip 0.43 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.