Schedule: a typical Tuesday (the flights of Jul 28, 2026, re-dated). Real flights replace these once the FAA publishes them, usually about a day ahead.
DELTA · FLIGHT DL 2101
SCHEDULED · TYPICAL SCHEDULE
Tuesday, September 29
DL 2101 · ATL → JFK
departs 8:30 PM ET · arrives 11:09 PM ET
Forecast issued Tue 10:00 PM ET · 2h after departure
Watch this flight
Other days
Tue 9/29
Today 22%
Fri 10/2 32%
Sun 10/4 28%
Mon 10/5 18%
Tue 10/6 13%
Wed 10/7 14%
Odds over time
Arrive at JFK more than 15 minutes late?
12%
chance · ±0 pts
+3 pts · 24h
HOW SURE WE ARE
Very high. The odds now come almost entirely from live conditions.
Arrive 15+ late
12%
Leave 15+ late
21%
Arrive 1h+ late
4%
Cancelled
<1%
WEATHER FORECASTS
LIVE
IN THE AIR
0%
5%
10%
15%
20%
2.8d
2d
1d
12h
6h
Departs
Now
Lands
Arrive at JFK more than 15 minutes late?
Calm-weather odds: 13% · changed +3 pts in 24h
+3 pts
12%
Yes 12%
No 88%
Leave ATL more than 15 minutes late?
Calm-weather odds: 22% · changed +6 pts in 24h
+6 pts
21%
Yes 21%
No 79%
Arrive at JFK more than an hour late?
Calm-weather odds: 4% · changed +1 pt in 24h
+1 pt
4%
Yes 4%
No 96%
Cancelled?
Calm-weather odds: <1% · changed +0 pts in 24h
+0 pts
<1%
Yes <1%
No 99%
How late will it get to JFK?
On time or early
87%
15–30 min late
4%
30 min–1 hour late
4%
1–2 hours late
3%
Over 2 hours late
1%
Cancelled
<1%
Gate arrival compared with the scheduled arrival. The ranges add up to 100%.
What’s moving the odds
↑
8pm departures from ATL are often late
↑
Later flights pick up delays from earlier in the day
↑
Arrivals into JFK at that hour are often late
↓
Tuesdays in September are usually quieter than average
↓
Mostly benign weather forecast at ATL
Weather at each end
ATL (origin)
Gusts 9 kt Ceiling none (clear) Visibility 10+ mi Precip none
JFK (destination)
Gusts 10 kt Ceiling 1,800 ft Visibility 10+ mi Precip none
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.