Schedule: a typical Thursday (the flights of Jul 30, 2026, re-dated). Real flights replace these once the FAA publishes them, usually about a day ahead.
DELTA · FLIGHT DL 1821
SCHEDULED · TYPICAL SCHEDULE
Thursday, October 1 Tomorrow
DL 1821 · PWM → DTW
departs 4:52 PM ET · arrives 6:54 PM ET
Forecast issued Wed 1:00 AM ET · 40h before departure
Watch this flight
Other days
Today 24%
Thu 10/1
Fri 10/2 22%
Sat 10/3 16%
Sun 10/4 23%
Mon 10/5 22%
Tue 10/6 14%
Odds over time
Arrive at DTW more than 15 minutes late?
28%
chance · ±0 pts
+6 pts · 24h
HOW SURE WE ARE
Moderate. The odds now blend history with early weather forecasts.
Arrive 15+ late
28%
Leave 15+ late
21%
Arrive 1h+ late
9%
Cancelled
<1%
WEATHER FORECASTS
LIVE
IN THE AIR
0%
10%
20%
30%
40%
2.9d
2d
Now
1d
12h
6h
Departs
Lands
Arrive at DTW more than 15 minutes late?
Calm-weather odds: 16% · changed +6 pts in 24h
+6 pts
28%
Yes 28%
No 72%
Leave PWM more than 15 minutes late?
Calm-weather odds: 16% · changed +2 pts in 24h
+2 pts
21%
Yes 21%
No 79%
Arrive at DTW more than an hour late?
Calm-weather odds: 5% · changed +2 pts in 24h
+2 pts
9%
Yes 9%
No 91%
Cancelled?
Calm-weather odds: <1% · changed +0 pts in 24h
+0 pts
<1%
Yes <1%
No 99%
How late will it get to DTW?
On time or early
72%
15–30 min late
11%
30 min–1 hour late
8%
1–2 hours late
6%
Over 2 hours late
3%
Cancelled
<1%
Gate arrival compared with the scheduled arrival. The ranges add up to 100%.
What’s moving the odds
↑
Later flights pick up delays from earlier in the day
↑
Cloud base down to 1,200 ft forecast at DTW that day
↑
PWM is prone to delays
↓
DTW usually runs smoothly
↓
Cloud base down to 200 ft, visibility down to 0.5 mi forecast at PWM that day
Weather at each end
PWM (origin)
Gusts 14 kt Ceiling 200 ft Visibility 0.5 mi Precip none
DTW (destination)
Gusts 15 kt Ceiling 1,200 ft Visibility 3 mi Precip 0.16 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.