Schedule: a typical Wednesday (the flights of Jul 29, 2026, re-dated). Real flights replace these once the FAA publishes them, usually about a day ahead.
DELTA · FLIGHT DL 2172
SCHEDULED · TYPICAL SCHEDULE
Wednesday, September 30 Tomorrow
DL 2172 · SAN → DTW
departs 2:40 PM PT · arrives 10:15 PM ET
Forecast issued Tue 7:00 PM ET · 23h before departure
Watch this flight
Other days
Today 16%
Wed 9/30
Thu 10/1 27%
Fri 10/2 24%
Sun 10/4 26%
Mon 10/5 21%
Odds over time
Arrive at DTW more than 15 minutes late?
20%
chance · ±2 pts
+5 pts · 24h
HOW SURE WE ARE
Good. The odds now lean mostly on firmed-up weather forecasts.
Arrive 15+ late
20%
Leave 15+ late
22%
Arrive 1h+ late
4%
Cancelled
<1%
WEATHER FORECASTS
LIVE
IN THE AIR
0%
10%
20%
30%
40%
2.8d
2d
Now
12h
6h
Departs
Lands
Arrive at DTW more than 15 minutes late?
Calm-weather odds: 15% · changed +5 pts in 24h
+5 pts
20%
Yes 20%
No 80%
Leave SAN more than 15 minutes late?
Calm-weather odds: 17% · changed +11 pts in 24h
+11 pts
22%
Yes 22%
No 78%
Arrive at DTW more than an hour late?
Calm-weather odds: 3% · changed +1 pt in 24h
+1 pt
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 DTW?
On time or early
79%
15–30 min late
9%
30 min–1 hour late
7%
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
↑
2pm departures from SAN are often late
↑
Arrivals into DTW at that hour are often late
↑
SAN is prone to delays
↓
Wednesdays in September are usually quieter than average
↓
This flight has been late 17% of the time recently
Weather at each end
SAN (origin)
Gusts 13 kt Ceiling 800 ft Visibility 8 mi Precip none
DTW (destination)
Gusts 14 kt Ceiling 4,500 ft Visibility 7 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.