Schedule: a typical summer Sunday (the flights of Jul 26, 2026), re-dated. Real flights replace these once airlines file their FAA flight plans, usually about a day ahead.
DELTA · FLIGHT DL 2331
SCHEDULED · TYPICAL SCHEDULE
Sunday, October 4
DL 2331 · PHL → DTW
departs 12:36 PM ET · arrives 2:20 PM ET
Forecast issued Fri 1:00 AM ET · 60h before departure
Watch this flight
Other days
Today 36%
Sat 10/3 6%
Sun 10/4
Mon 10/5 12%
Tue 10/6 8%
Wed 10/7 11%
Thu 10/8 11%
Odds over time
Arrive at DTW more than 15 minutes late?
13%
chance · ±1 pts
– · 24h
HOW SURE WE ARE
Moderate. The odds now blend history with early weather forecasts.
Arrive 15+ late
13%
Leave 15+ late
15%
Arrive 1h+ late
5%
Cancelled
<1%
MOSTLY HISTORY
WEATHER FORECASTS
LIVE
IN THE AIR
0%
5%
10%
15%
20%
5.6d
Now
2d
1d
12h
6h
Departs
Lands
Arrive at DTW more than 15 minutes late?
Calm-weather odds: 11% · changed – in 24h
–
13%
Yes 13%
No 87%
Leave PHL more than 15 minutes late?
Calm-weather odds: 10% · changed – in 24h
–
15%
Yes 15%
No 85%
Arrive at DTW more than an hour late?
Calm-weather odds: 3% · changed – in 24h
–
5%
Yes 5%
No 95%
Cancelled?
Calm-weather odds: <1% · changed – in 24h
–
<1%
Yes <1%
No 99%
How late will it get to DTW?
On time or early
87%
15–30 min late
2%
30 min–1 hour late
6%
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
↑
12pm departures from PHL are often late
↑
Cloud base down to 200 ft, visibility down to 2 mi forecast at PHL that day
↓
Mostly benign weather forecast at DTW
↓
Sundays in October are usually quieter than average
Weather at each end
PHL (origin)
Gusts 12 kt Ceiling 200 ft Visibility 1 mi Precip 0.13 in
DTW (destination)
Gusts 16 kt Ceiling none (clear) 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.