Schedule: a typical Tuesday (the flights of Jul 28, 2026, re-dated). Real flights replace these once the FAA publishes them, usually about a day ahead.
DELTA · FLIGHT DL 2172
SCHEDULED · TYPICAL SCHEDULE
Tuesday, September 29 Today
DL 2172 · SAN → DTW
departs 2:40 PM PT · arrives 10:15 PM ET
Forecast issued Tue 4:00 PM ET · 2h before departure
Watch this flight
Other days
Today
Wed 9/30 20%
Thu 10/1 25%
Fri 10/2 24%
Sun 10/4 26%
Mon 10/5 21%
Odds over time
Arrive at DTW more than 15 minutes late?
16%
chance · ±0 pts
+0 pts · 24h
HOW SURE WE ARE
High. The odds now come mostly from live FAA and airport data.
Arrive 15+ late
16%
Leave 15+ late
18%
Arrive 1h+ late
3%
Cancelled
<1%
WEATHER FORECASTS
LIVE
IN THE AIR
0%
10%
20%
30%
40%
2.8d
2d
1d
12h
6h
Now
Departs
Lands
Arrive at DTW more than 15 minutes late?
Calm-weather odds: 15% · changed +0 pts in 24h
+0 pts
16%
Yes 16%
No 84%
Leave SAN more than 15 minutes late?
Calm-weather odds: 18% · changed +5 pts in 24h
+5 pts
18%
Yes 18%
No 82%
Arrive at DTW more than an hour late?
Calm-weather odds: 3% · changed −1 pt in 24h
−1 pt
3%
Yes 3%
No 97%
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
84%
15–30 min late
6%
30 min–1 hour late
6%
1–2 hours late
2%
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
↓
Mostly benign weather forecast at SAN
↓
Tuesdays in September are usually quieter than average
Weather at each end
SAN (origin)
Gusts 9 kt Ceiling 2,300 ft Visibility 10+ mi Precip none
DTW (destination)
Gusts 9 kt Ceiling none (clear) Visibility 9 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.