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 1721
SCHEDULED · TYPICAL SCHEDULE
Sunday, October 4
DL 1721 · MOB → ATL
departs 6:05 AM CT · arrives 8:28 AM ET
Forecast issued Thu 10:00 PM ET · 57h before departure
Watch this flight
Other days
Today 7%
Fri 10/2 11%
Sat 10/3 8%
Sun 10/4
Mon 10/5 6%
Tue 10/6 6%
Wed 10/7 6%
Odds over time
Arrive at ATL more than 15 minutes late?
13%
chance · ±6 pts
– · 24h
HOW SURE WE ARE
Moderate. The odds now blend history with early weather forecasts.
Arrive 15+ late
13%
Leave 15+ late
9%
Arrive 1h+ late
5%
Cancelled
4%
MOSTLY HISTORY
WEATHER FORECASTS
LIVE
IN THE AIR
0%
10%
20%
30%
40%
5.4d
Now
2d
1d
12h
6h
Departs
Lands
Arrive at ATL more than 15 minutes late?
Calm-weather odds: 6% · changed – in 24h
–
13%
Yes 13%
No 87%
Leave MOB more than 15 minutes late?
Calm-weather odds: 5% · changed – in 24h
–
9%
Yes 9%
No 91%
Arrive at ATL more than an hour late?
Calm-weather odds: 3% · changed – in 24h
–
5%
Yes 5%
No 95%
Cancelled?
Calm-weather odds: <1% · changed – in 24h
–
4%
Yes 4%
No 96%
How late will it get to ATL?
On time or early
84%
15–30 min late
5%
30 min–1 hour late
4%
1–2 hours late
<1%
Over 2 hours late
4%
Cancelled
4%
Gate arrival compared with the scheduled arrival. The ranges add up to 100%.
What’s moving the odds
↑
Cloud base down to 400 ft, visibility down to 2 mi, 2.7 in of rain forecast at MOB that day
↑
Cloud base down to 300 ft, visibility down to 2 mi, 1.1 in of rain forecast at ATL that day
↓
Early flights usually leave on time
↓
6am departures from MOB are usually not late
Weather at each end
MOB (origin)
Gusts 10 kt Ceiling 400 ft Visibility 2 mi Precip 2.40 in
ATL (destination)
Gusts 10 kt Ceiling 300 ft Visibility 2 mi Precip 1.16 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.