Schedule: a typical summer Sunday (the flights of Jul 26, 2026), re-dated. Real flights replace these once airlines file their FAA flight plans, usually about a day ahead.
DELTA · FLIGHT DL 1309
SCHEDULED · TYPICAL SCHEDULE
Sunday, October 4 Tomorrow
DL 1309 · ATL → IAD
departs 7:15 PM ET · arrives 9:03 PM ET
Forecast issued Sat 4:00 AM ET · 39h before departure
Watch this flight
Other days
Today 33%
Sun 10/4
Mon 10/5 19%
Tue 10/6 14%
Wed 10/7 13%
Thu 10/8 16%
Fri 10/9 20%
Odds over time
Arrive at IAD more than 15 minutes late?
41%
chance · ±1 pts
+2 pts · 24h
HOW SURE WE ARE
Moderate. The odds now blend history with early weather forecasts.
Arrive 15+ late
41%
Leave 15+ late
42%
Arrive 1h+ late
12%
Cancelled
2%
MOSTLY HISTORY
WEATHER FORECASTS
LIVE
IN THE AIR
0%
15%
30%
45%
60%
5.9d
2d
Now
1d
12h
6h
Departs
Lands
Arrive at IAD more than 15 minutes late?
Calm-weather odds: 23% · changed +2 pts in 24h
+2 pts
41%
Yes 41%
No 59%
Leave ATL more than 15 minutes late?
Calm-weather odds: 22% · changed −1 pt in 24h
−1 pt
42%
Yes 42%
No 58%
Arrive at IAD more than an hour late?
Calm-weather odds: 4% · changed −1 pt in 24h
−1 pt
12%
Yes 12%
No 88%
Cancelled?
Calm-weather odds: <1% · changed +0 pts in 24h
+0 pts
2%
Yes 2%
No 98%
How late will it get to IAD?
On time or early
58%
15–30 min late
12%
30 min–1 hour late
17%
1–2 hours late
8%
Over 2 hours late
4%
Cancelled
2%
Gate arrival compared with the scheduled arrival. The ranges add up to 100%.
What’s moving the odds
↑
Cloud base down to 300 ft, visibility down to 1 mi, 1.4 in of rain forecast at ATL that day
↑
7pm departures from ATL are often late
↑
Cloud base down to 200 ft, visibility down to 1 mi, 0.3 in of rain forecast at IAD that day
↓
ATL usually runs smoothly
↓
Sundays in October are usually quieter than average
Weather at each end
ATL (origin)
Gusts 8 kt Ceiling 300 ft Visibility 1 mi Precip 1.43 in
IAD (destination)
Gusts 8 kt Ceiling 200 ft Visibility 1 mi Precip 0.13 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.