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 2161
SCHEDULED · TYPICAL SCHEDULE
Sunday, October 4
DL 2161 · GRR → ATL
departs 7:53 AM ET · arrives 9:56 AM ET
Forecast issued Fri 12:00 AM ET · 56h before departure
Watch this flight
Other days
Today 20%
Sat 10/3 7%
Sun 10/4
Mon 10/5 9%
Tue 10/6 8%
Wed 10/7 7%
Thu 10/8 6%
Odds over time
Arrive at ATL more than 15 minutes late?
16%
chance · ±3 pts
– · 24h
HOW SURE WE ARE
Moderate. The odds now blend history with early weather forecasts.
Arrive 15+ late
16%
Leave 15+ late
10%
Arrive 1h+ late
2%
Cancelled
<1%
MOSTLY HISTORY
WEATHER FORECASTS
LIVE
IN THE AIR
0%
10%
20%
30%
40%
5.4d
Now
2d
1d
12h
6h
Departs
Lands
Arrive at ATL more than 15 minutes late?
Calm-weather odds: 6% · changed – in 24h
–
16%
Yes 16%
No 84%
Leave GRR more than 15 minutes late?
Calm-weather odds: 7% · changed – in 24h
–
10%
Yes 10%
No 90%
Arrive at ATL more than an hour late?
Calm-weather odds: 2% · changed – in 24h
–
2%
Yes 2%
No 98%
Cancelled?
Calm-weather odds: <1% · changed – in 24h
–
<1%
Yes <1%
No 99%
How late will it get to ATL?
On time or early
83%
15–30 min late
10%
30 min–1 hour late
3%
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, visibility down to 2 mi, 1.4 in of rain forecast at ATL that day
↑
Arrivals into ATL at that hour are often late
↑
ATL is busy at that time
↓
Mostly benign weather forecast at GRR
↓
GRR usually runs smoothly
Weather at each end
GRR (origin)
Gusts 22 kt Ceiling none (clear) Visibility 10+ mi Precip none
ATL (destination)
Gusts 10 kt Ceiling 300 ft Visibility 2 mi Precip 1.35 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.