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 · ATL → IAD
departs 12:17 PM ET · arrives 2:01 PM ET
Forecast issued Fri 1:00 PM ET · 1h after departure
Watch this flight
Other days
Today
Sat 10/3 14%
Sun 10/4 24%
Mon 10/5 10%
Tue 10/6 8%
Wed 10/7 9%
Thu 10/8 10%
Odds over time
Arrive at IAD more than 15 minutes late?
12%
chance · ±1 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
16%
Arrive 1h+ late
3%
Cancelled
<1%
WEATHER FORECASTS
LIVE
IN THE AIR
0%
15%
30%
45%
60%
3.6d
2d
1d
12h
6h
Departs
Lands
Arrive at IAD more than 15 minutes late?
Calm-weather odds: 11% · changed −3 pts in 24h
−3 pts
12%
Yes 12%
No 88%
Leave ATL more than 15 minutes late?
Calm-weather odds: 14% · changed +2 pts in 24h
+2 pts
16%
Yes 16%
No 84%
Arrive at IAD more than an hour late?
Calm-weather odds: 3% · changed −1 pt in 24h
−1 pt
3%
Yes 3%
No 97%
Cancelled?
Calm-weather odds: <1% · changed +0 pts in 24h
+0 pts
<1%
Yes <1%
No 99%
How late will it get to IAD?
On time or early
88%
15–30 min late
6%
30 min–1 hour late
2%
1–2 hours late
2%
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
↑
Other factors
↓
Arrivals into IAD at that hour are usually not late
↓
ATL usually runs smoothly
Weather at each end
ATL (origin)
Gusts 8 kt Ceiling 600 ft Visibility 5 mi Precip none
IAD (destination)
Gusts 15 kt Ceiling 6,000 ft Visibility 10+ mi Precip 0.02 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.