Schedule: a typical summer Monday (the flights of Jul 27, 2026), re-dated. Real flights replace these once airlines file their FAA flight plans, usually about a day ahead.
DELTA · FLIGHT DL 1631
SCHEDULED · TYPICAL SCHEDULE
Monday, October 5
DL 1631 · ATL → MIA
departs 5:09 PM ET · arrives 7:25 PM ET
Forecast issued Fri 9:00 PM ET · 68h before departure
Watch this flight
Other days
Today 26%
Sat 10/3 26%
Sun 10/4 37%
Mon 10/5
Odds over time
Arrive at MIA more than 15 minutes late?
20%
chance · ±1 pts
– · 24h
HOW SURE WE ARE
Moderate. The odds now blend history with early weather forecasts.
Arrive 15+ late
20%
Leave 15+ late
27%
Arrive 1h+ late
8%
Cancelled
1%
MOSTLY HISTORY
WEATHER FORECASTS
LIVE
IN THE AIR
0%
10%
20%
30%
40%
6.7d
Now
2d
1d
12h
6h
Departs
Lands
Arrive at MIA more than 15 minutes late?
Calm-weather odds: 15% · changed – in 24h
–
20%
Yes 20%
No 80%
Leave ATL more than 15 minutes late?
Calm-weather odds: 18% · changed – in 24h
–
27%
Yes 27%
No 73%
Arrive at MIA more than an hour late?
Calm-weather odds: 4% · changed – in 24h
–
8%
Yes 8%
No 92%
Cancelled?
Calm-weather odds: <1% · changed – in 24h
–
1%
Yes 1%
No 99%
How late will it get to MIA?
On time or early
79%
15–30 min late
4%
30 min–1 hour late
8%
1–2 hours late
6%
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
↑
5pm departures from ATL are often late
↑
Arrivals into MIA at that hour are often late
↑
This flight has been late 35% of the time recently
↓
Mondays in October are usually quieter than average
↓
ATL usually runs smoothly
Weather at each end
ATL (origin)
Gusts 14 kt Ceiling 300 ft Visibility 2 mi Precip 0.67 in
MIA (destination)
Gusts 14 kt Ceiling none (clear) Visibility 10+ mi Precip 0.03 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.