Schedule: a typical summer Friday (the flights of Jul 31, 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
Friday, October 2
DL 1821 · DTW → PWM
departs 2:05 PM ET · arrives 4:01 PM ET
Forecast issued Fri 10:00 PM ET · 8h after departure
Watch this flight
Other days
Fri 10/2
Today 23%
Mon 10/5 8%
Tue 10/6 6%
Wed 10/7 11%
Thu 10/8 12%
Fri 10/9 12%
Sat 10/10 12%
Odds over time
Arrive at PWM more than 15 minutes late?
16%
chance · ±0 pts
+2 pts · 24h
HOW SURE WE ARE
Very high. The odds now come almost entirely from live conditions.
Arrive 15+ late
16%
Leave 15+ late
20%
Arrive 1h+ late
4%
Cancelled
<1%
WEATHER FORECASTS
LIVE
IN THE AIR
0%
15%
30%
45%
60%
3.7d
2d
1d
12h
6h
Departs
Lands
Arrive at PWM more than 15 minutes late?
Calm-weather odds: 16% · changed +2 pts in 24h
+2 pts
16%
Yes 16%
No 84%
Leave DTW more than 15 minutes late?
Calm-weather odds: 20% · changed +4 pts in 24h
+4 pts
20%
Yes 20%
No 80%
Arrive at PWM more than an hour late?
Calm-weather odds: 4% · 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 99%
How late will it get to PWM?
On time or early
84%
15–30 min late
5%
30 min–1 hour late
7%
1–2 hours late
2%
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
↓
This flight has been late 15% of the time recently
↓
DTW usually runs smoothly
Weather at each end
DTW (origin)
Gusts 28 kt Ceiling 800 ft Visibility 1.75 mi Precip 1.43 in
PWM (destination)
Gusts 17 kt Ceiling 2,000 ft Visibility 4 mi Precip 0.04 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.