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 2135
SCHEDULED · TYPICAL SCHEDULE
Monday, October 5
DL 2135 · ATL → IAD
departs 12:17 PM ET · arrives 2:01 PM ET
Forecast issued Fri 6:00 PM ET · 66h before departure
Watch this flight
Other days
Today 11%
Sat 10/3 13%
Sun 10/4 24%
Mon 10/5
Tue 10/6 8%
Wed 10/7 9%
Thu 10/8 10%
Odds over time
Arrive at IAD more than 15 minutes late?
13%
chance · ±1 pts
– · 24h
HOW SURE WE ARE
Moderate. The odds now blend history with early weather forecasts.
Arrive 15+ late
13%
Leave 15+ late
16%
Arrive 1h+ late
3%
Cancelled
<1%
MOSTLY HISTORY
WEATHER FORECASTS
LIVE
IN THE AIR
0%
5%
10%
15%
20%
6.5d
Now
2d
1d
12h
6h
Departs
Lands
Arrive at IAD more than 15 minutes late?
Calm-weather odds: 8% · changed – in 24h
–
13%
Yes 13%
No 87%
Leave ATL more than 15 minutes late?
Calm-weather odds: 8% · changed – in 24h
–
16%
Yes 16%
No 84%
Arrive at IAD more than an hour late?
Calm-weather odds: 3% · changed – in 24h
–
3%
Yes 3%
No 97%
Cancelled?
Calm-weather odds: <1% · changed – in 24h
–
<1%
Yes <1%
No 99%
How late will it get to IAD?
On time or early
86%
15–30 min late
2%
30 min–1 hour late
8%
1–2 hours late
1%
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
↑
Cloud base down to 300 ft, 1.0 in of rain forecast at ATL that day
↑
Other factors
↑
ATL is busy at that time
↓
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 3 mi Precip 0.99 in
IAD (destination)
Gusts 18 kt Ceiling 300 ft Visibility 3 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.