Schedule: a typical summer Friday (the flights of Jul 31, 2026), re-dated. Real flights replace these once airlines file their FAA flight plans, usually about a day ahead.
DELTA · FLIGHT DL 2135
SCHEDULED · TYPICAL SCHEDULE
Friday, October 2 Today
DL 2135 · IAD → ATL
departs 3:02 PM ET · arrives 4:53 PM ET
Forecast issued Fri 9:00 PM ET · 6h after departure
Watch this flight
Other days
Today
Sat 10/3 16%
Sun 10/4 37%
Mon 10/5 14%
Tue 10/6 14%
Wed 10/7 16%
Thu 10/8 11%
Odds over time
Arrive at ATL more than 15 minutes late?
26%
chance · ±0 pts
+9 pts · 24h
HOW SURE WE ARE
Very high. The odds now come almost entirely from live conditions.
Arrive 15+ late
26%
Leave 15+ late
27%
Arrive 1h+ late
8%
Cancelled
1%
WEATHER FORECASTS
LIVE
IN THE AIR
0%
15%
30%
45%
60%
3.7d
2d
1d
12h
6h
Departs
Lands
Arrive at ATL more than 15 minutes late?
Calm-weather odds: 26% · changed +9 pts in 24h
+9 pts
26%
Yes 26%
No 74%
Leave IAD more than 15 minutes late?
Calm-weather odds: 27% · changed +6 pts in 24h
+6 pts
27%
Yes 27%
No 73%
Arrive at ATL more than an hour late?
Calm-weather odds: 8% · changed +2 pts in 24h
+2 pts
8%
Yes 8%
No 92%
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
73%
15–30 min late
4%
30 min–1 hour late
14%
1–2 hours late
2%
Over 2 hours late
6%
Cancelled
1%
Gate arrival compared with the scheduled arrival. The ranges add up to 100%.
What’s moving the odds
↑
Mostly benign weather forecast at IAD
↑
Arrivals into ATL at that hour are often late
↑
Later flights pick up delays from earlier in the day
↓
Cloud base down to 600 ft forecast at ATL that day
↓
ATL usually runs smoothly
Weather at each end
IAD (origin)
Gusts 22 kt Ceiling 2,600 ft Visibility 1.75 mi Precip 0.56 in
ATL (destination)
Gusts 8 kt Ceiling 600 ft Visibility 5 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.