Schedule: a typical summer Saturday (the flights of Jul 25, 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
Saturday, October 3 Today
DL 1821 · DTW → PWM
departs 2:05 PM ET · arrives 4:01 PM ET
Forecast issued Sat 1:00 AM ET · 13h before departure
Watch this flight
Other days
Today
Sun 10/4 12%
Mon 10/5 10%
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?
16%
chance · ±0 pts
+7 pts · 24h
HOW SURE WE ARE
Good. The odds now lean mostly on firmed-up weather forecasts.
Arrive 15+ late
16%
Leave 15+ late
17%
Arrive 1h+ late
4%
Cancelled
<1%
MOSTLY HISTORY
WEATHER FORECASTS
LIVE
IN THE AIR
0%
5%
10%
15%
20%
4.7d
2d
1d
Now
6h
Departs
Lands
Arrive at PWM more than 15 minutes late?
Calm-weather odds: 10% · changed +7 pts in 24h
+7 pts
16%
Yes 16%
No 84%
Leave DTW more than 15 minutes late?
Calm-weather odds: 11% · changed +9 pts in 24h
+9 pts
17%
Yes 17%
No 83%
Arrive at PWM more than an hour late?
Calm-weather odds: 3% · changed +2 pts in 24h
+2 pts
4%
Yes 4%
No 96%
Cancelled?
Calm-weather odds: <1% · changed +0 pts in 24h
+0 pts
<1%
Yes <1%
No 100%
How late will it get to PWM?
On time or early
84%
15–30 min late
8%
30 min–1 hour late
3%
1–2 hours late
3%
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
↑
Other factors
↓
Mostly benign weather forecast at DTW
↓
DL's recent on-time record
Weather at each end
DTW (origin)
Gusts 9 kt Ceiling 5,500 ft Visibility 10+ mi Precip none
PWM (destination)
Gusts 12 kt Ceiling 7,000 ft Visibility 10+ 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.