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 1299
SCHEDULED · TYPICAL SCHEDULE
Sunday, October 4
DL 1299 · SLC → IAH
departs 1:45 PM MT · arrives 5:53 PM CT
Forecast issued Fri 7:00 PM ET · 45h before departure
Watch this flight
Other days
Today 30%
Sat 10/3 15%
Sun 10/4
Mon 10/5 18%
Tue 10/6 16%
Wed 10/7 14%
Thu 10/8 16%
Odds over time
Arrive at IAH more than 15 minutes late?
27%
chance · ±2 pts
−9 pts · 24h
HOW SURE WE ARE
Moderate. The odds now blend history with early weather forecasts.
Arrive 15+ late
27%
Leave 15+ late
23%
Arrive 1h+ late
6%
Cancelled
<1%
MOSTLY HISTORY
WEATHER FORECASTS
LIVE
IN THE AIR
0%
15%
30%
45%
60%
5.7d
Now
1d
12h
6h
Departs
Lands
Arrive at IAH more than 15 minutes late?
Calm-weather odds: 16% · changed −9 pts in 24h
−9 pts
27%
Yes 27%
No 73%
Leave SLC more than 15 minutes late?
Calm-weather odds: 22% · changed −4 pts in 24h
−4 pts
23%
Yes 23%
No 77%
Arrive at IAH more than an hour late?
Calm-weather odds: 5% · changed −4 pts in 24h
−4 pts
6%
Yes 6%
No 94%
Cancelled?
Calm-weather odds: <1% · changed −1 pt in 24h
−1 pt
<1%
Yes <1%
No 99%
How late will it get to IAH?
On time or early
72%
15–30 min late
10%
30 min–1 hour late
11%
1–2 hours late
3%
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 900 ft forecast at IAH that day
↑
Arrivals into IAH at that hour are often late
↑
Early flights usually leave on time
↓
Mostly benign weather forecast at SLC
↓
Sundays in October are usually quieter than average
Weather at each end
SLC (origin)
Gusts 11 kt Ceiling none (clear) Visibility 10+ mi Precip none
IAH (destination)
Gusts 19 kt Ceiling 600 ft Visibility 10+ mi Precip 0.10 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.