Schedule: a typical Saturday (the flights of Jul 25, 2026, re-dated). Real flights replace these once the FAA publishes them, usually about a day ahead.
DELTA · FLIGHT DL 2161
SCHEDULED · TYPICAL SCHEDULE
Saturday, October 3
DL 2161 · GRR → ATL
departs 9:00 AM ET · arrives 11:01 AM ET
Forecast issued Thu 5:00 PM ET · 40h before departure
Watch this flight
Other days
Today 11%
Fri 10/2 9%
Sat 10/3
Sun 10/4 8%
Mon 10/5 9%
Tue 10/6 8%
Wed 10/7 7%
Odds over time
Arrive at ATL more than 15 minutes late?
10%
chance · ±1 pts
+2 pts · 24h
HOW SURE WE ARE
Moderate. The odds now blend history with early weather forecasts.
Arrive 15+ late
10%
Leave 15+ late
9%
Arrive 1h+ late
2%
Cancelled
<1%
MOSTLY HISTORY
WEATHER FORECASTS
LIVE
IN THE AIR
0%
5%
10%
15%
20%
4.5d
2d
Now
1d
12h
6h
Departs
Lands
Arrive at ATL more than 15 minutes late?
Calm-weather odds: 4% · changed +2 pts in 24h
+2 pts
10%
Yes 10%
No 90%
Leave GRR more than 15 minutes late?
Calm-weather odds: 6% · changed +0 pts in 24h
+0 pts
9%
Yes 9%
No 91%
Arrive at ATL more than an hour late?
Calm-weather odds: 2% · changed +0 pts in 24h
+0 pts
2%
Yes 2%
No 98%
Cancelled?
Calm-weather odds: <1% · changed +0 pts in 24h
+0 pts
<1%
Yes <1%
No 99%
How late will it get to ATL?
On time or early
89%
15–30 min late
4%
30 min–1 hour late
4%
1–2 hours late
1%
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
↑
0.4 in of rain forecast at ATL that day
↓
DL's recent on-time record
↓
Mostly benign weather forecast at GRR
Weather at each end
GRR (origin)
Gusts 12 kt Ceiling none (clear) Visibility 8 mi Precip none
ATL (destination)
Gusts 8 kt Ceiling 3,800 ft Visibility 4 mi Precip 0.43 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.