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 2621
SCHEDULED · TYPICAL SCHEDULE
Sunday, October 4
DL 2621 · RDU → ATL
departs 6:27 PM ET · arrives 8:01 PM ET
Forecast issued Fri 7:00 AM ET · 60h before departure
Watch this flight
Other days
Today 46%
Sat 10/3 24%
Sun 10/4
Mon 10/5 14%
Tue 10/6 9%
Wed 10/7 9%
Odds over time
Arrive at ATL more than 15 minutes late?
44%
chance · ±6 pts
– · 24h
HOW SURE WE ARE
Moderate. The odds now blend history with early weather forecasts.
Arrive 15+ late
44%
Leave 15+ late
42%
Arrive 1h+ late
11%
Cancelled
2%
MOSTLY HISTORY
WEATHER FORECASTS
LIVE
IN THE AIR
0%
15%
30%
45%
60%
5.9d
Now
2d
1d
12h
6h
Departs
Lands
Arrive at ATL more than 15 minutes late?
Calm-weather odds: 15% · changed – in 24h
–
44%
Yes 44%
No 56%
Leave RDU more than 15 minutes late?
Calm-weather odds: 22% · changed – in 24h
–
42%
Yes 42%
No 58%
Arrive at ATL more than an hour late?
Calm-weather odds: 3% · changed – in 24h
–
11%
Yes 11%
No 89%
Cancelled?
Calm-weather odds: <1% · changed – in 24h
–
2%
Yes 2%
No 98%
How late will it get to ATL?
On time or early
55%
15–30 min late
14%
30 min–1 hour late
18%
1–2 hours late
7%
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, 1.8 in of rain forecast at ATL that day
↑
Arrivals into ATL at that hour are often late
↑
Cloud base down to 200 ft, visibility down to 1 mi, 1.3 in of rain forecast at RDU that day
↓
ATL usually runs smoothly
↓
Sundays in October are usually quieter than average
Weather at each end
RDU (origin)
Gusts 8 kt Ceiling 200 ft Visibility 2 mi Precip 1.30 in
ATL (destination)
Gusts 9 kt Ceiling 300 ft Visibility 1 mi Precip 1.80 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.