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 2427
SCHEDULED · TYPICAL SCHEDULE
Friday, October 2 Today
DL 2427 · ATL → COS
departs 11:30 AM ET · arrives 12:32 PM MT
Forecast issued Fri 12:00 AM ET · 12h before departure
Watch this flight
Other days
Today
Sat 10/3 16%
Sun 10/4 15%
Mon 10/5 14%
Tue 10/6 12%
Wed 10/7 13%
Thu 10/8 13%
Odds over time
Arrive at COS more than 15 minutes late?
29%
chance · ±0 pts
+14 pts · 24h
HOW SURE WE ARE
Good. The odds now lean mostly on firmed-up weather forecasts.
Arrive 15+ late
29%
Leave 15+ late
29%
Arrive 1h+ late
4%
Cancelled
3%
WEATHER FORECASTS
LIVE
IN THE AIR
0%
15%
30%
45%
60%
3.6d
2d
1d
Now
6h
Departs
Lands
Arrive at COS more than 15 minutes late?
Calm-weather odds: 11% · changed +14 pts in 24h
+14 pts
29%
Yes 29%
No 71%
Leave ATL more than 15 minutes late?
Calm-weather odds: 12% · changed +12 pts in 24h
+12 pts
29%
Yes 29%
No 71%
Arrive at COS 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 +3 pts in 24h
+3 pts
3%
Yes 3%
No 97%
How late will it get to COS?
On time or early
69%
15–30 min late
21%
30 min–1 hour late
3%
1–2 hours late
3%
Over 2 hours late
1%
Cancelled
3%
Gate arrival compared with the scheduled arrival. The ranges add up to 100%.
What’s moving the odds
↑
Arrivals into COS at that hour are often late
↑
ATL is busy at that time
↑
Gusts to 27 kt, cloud base down to 200 ft, visibility down to 0.7 mi forecast at COS that day
↓
Mostly benign weather forecast at ATL
↓
ATL usually runs smoothly
Weather at each end
ATL (origin)
Gusts 7 kt Ceiling 6,000 ft Visibility 10+ mi Precip 0.02 in
COS (destination)
Gusts 27 kt Ceiling 400 ft Visibility 5 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.