Schedule: a typical Thursday (the flights of Jul 30, 2026, re-dated). Real flights replace these once the FAA publishes them, usually about a day ahead.
DELTA · FLIGHT DL 2666
SCHEDULED · TYPICAL SCHEDULE
Thursday, October 1 Tomorrow
DL 2666 · SLC → STL
departs 8:50 PM MT · arrives 12:41 AM CT
Forecast issued Wed 8:00 AM ET · 39h before departure
Watch this flight
Other days
Today 16%
Thu 10/1
Fri 10/2 19%
Sat 10/3 14%
Sun 10/4 21%
Mon 10/5 15%
Tue 10/6 13%
Odds over time
Arrive at STL more than 15 minutes late?
15%
chance · ±4 pts
+0 pts · 24h
HOW SURE WE ARE
Moderate. The odds now blend history with early weather forecasts.
Arrive 15+ late
15%
Leave 15+ late
17%
Arrive 1h+ late
4%
Cancelled
<1%
WEATHER FORECASTS
LIVE
IN THE AIR
0%
10%
20%
30%
40%
2.9d
2d
Now
1d
12h
6h
Departs
Lands
Arrive at STL more than 15 minutes late?
Calm-weather odds: 15% · changed +0 pts in 24h
+0 pts
15%
Yes 15%
No 85%
Leave SLC more than 15 minutes late?
Calm-weather odds: 18% · changed +0 pts in 24h
+0 pts
17%
Yes 17%
No 83%
Arrive at STL more than an hour late?
Calm-weather odds: 3% · changed +0 pts in 24h
+0 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 STL?
On time or early
84%
15–30 min late
6%
30 min–1 hour late
5%
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
↑
Cloud base down to 1,267 ft, 0.3 in of rain forecast at STL that day
↑
Later flights pick up delays from earlier in the day
↑
Other factors
↓
Mostly benign weather forecast at SLC
↓
STL usually runs smoothly
Weather at each end
SLC (origin)
Gusts 11 kt Ceiling none (clear) Visibility 10+ mi Precip none
STL (destination)
Gusts 16 kt Ceiling 1,267 ft Visibility 3.33333 mi Precip 0.26 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.