Schedule: a typical Wednesday (the flights of Jul 29, 2026, re-dated). Real flights replace these once the FAA publishes them, usually about a day ahead.
DELTA · FLIGHT DL 2101
SCHEDULED · TYPICAL SCHEDULE
Wednesday, September 30 Today
DL 2101 · ATL → JFK
departs 8:30 PM ET · arrives 11:09 PM ET
Forecast issued Wed 3:00 PM ET · 6h before departure
Watch this flight
Other days
Today
Thu 10/1 22%
Fri 10/2 22%
Sat 10/3 20%
Sun 10/4 28%
Mon 10/5 18%
Tue 10/6 13%
Odds over time
Arrive at JFK more than 15 minutes late?
20%
chance · ±0 pts
+9 pts · 24h
HOW SURE WE ARE
High. The odds now come mostly from live FAA and airport data.
Arrive 15+ late
20%
Leave 15+ late
23%
Arrive 1h+ late
4%
Cancelled
<1%
WEATHER FORECASTS
LIVE
IN THE AIR
0%
10%
20%
30%
40%
2.8d
2d
1d
12h
Now
Departs
Lands
Arrive at JFK more than 15 minutes late?
Calm-weather odds: 12% · changed +9 pts in 24h
+9 pts
20%
Yes 20%
No 80%
Leave ATL more than 15 minutes late?
Calm-weather odds: 20% · changed +5 pts in 24h
+5 pts
23%
Yes 23%
No 77%
Arrive at JFK more than an hour late?
Calm-weather odds: 4% · changed +0 pts in 24h
+0 pts
4%
Yes 4%
No 96%
Cancelled?
Calm-weather odds: <1% · changed +0 pts in 24h
+0 pts
<1%
Yes <1%
No 100%
How late will it get to JFK?
On time or early
80%
15–30 min late
9%
30 min–1 hour late
6%
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
↓
Wednesdays in September are usually quieter than average
↓
Mostly benign weather forecast at JFK
Weather at each end
ATL (origin)
Gusts 10 kt Ceiling 200 ft Visibility 0.5 mi Precip none
JFK (destination)
Gusts 11 kt Ceiling 2,700 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.