Schedule: a typical summer Monday (the flights of Jul 27, 2026), re-dated. Real flights replace these once airlines file their FAA flight plans, usually about a day ahead.
DELTA · FLIGHT DL 1821
SCHEDULED · TYPICAL SCHEDULE
Monday, October 5
DL 1821 · DTW → PWM
departs 2:05 PM ET · arrives 4:01 PM ET
Forecast issued Sat 2:00 AM ET · 60h before departure
Watch this flight
Other days
Today 16%
Sun 10/4 12%
Mon 10/5
Tue 10/6 9%
Wed 10/7 11%
Thu 10/8 12%
Fri 10/9 12%
Odds over time
Arrive at PWM more than 15 minutes late?
8%
chance · ±2 pts
– · 24h
HOW SURE WE ARE
Moderate. The odds now blend history with early weather forecasts.
Arrive 15+ late
8%
Leave 15+ late
11%
Arrive 1h+ late
3%
Cancelled
<1%
MOSTLY HISTORY
WEATHER FORECASTS
LIVE
IN THE AIR
0%
5%
10%
15%
20%
6.6d
Now
2d
1d
12h
6h
Departs
Lands
Arrive at PWM more than 15 minutes late?
Calm-weather odds: 7% · changed – in 24h
–
8%
Yes 8%
No 92%
Leave DTW more than 15 minutes late?
Calm-weather odds: 9% · changed – in 24h
–
11%
Yes 11%
No 89%
Arrive at PWM more than an hour late?
Calm-weather odds: 2% · changed – in 24h
–
3%
Yes 3%
No 97%
Cancelled?
Calm-weather odds: <1% · changed – in 24h
–
<1%
Yes <1%
No 99%
How late will it get to PWM?
On time or early
92%
15–30 min late
2%
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
↑
Other factors
↑
Later flights pick up delays from earlier in the day
↓
Mostly benign weather forecast at DTW
↓
Mondays in October are usually quieter than average
Weather at each end
DTW (origin)
Gusts 17 kt Ceiling none (clear) Visibility 10+ mi Precip none
PWM (destination)
Gusts 24 kt Ceiling 200 ft Visibility 2 mi Precip none
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.