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 1238
SCHEDULED · TYPICAL SCHEDULE
Tuesday, September 29 Yesterday
DL 1238 · PDX → SLC
departs 7:20 PM PT · arrives 10:13 PM MT
Forecast issued Tue 10:00 PM ET · 0h before departure
Watch this flight
Other days
Tue 9/29
Today 14%
Thu 10/1 13%
Fri 10/2 12%
Sun 10/4 13%
Mon 10/5 10%
Tue 10/6 8%
Odds over time
Arrive at SLC more than 15 minutes late?
9%
chance · ±0 pts
+0 pts · 24h
HOW SURE WE ARE
Very high. The odds now come almost entirely from live conditions.
Arrive 15+ late
9%
Leave 15+ late
15%
Arrive 1h+ late
4%
Cancelled
<1%
WEATHER FORECASTS
LIVE
IN THE AIR
0%
5%
10%
15%
20%
2.8d
2d
1d
12h
6h
Now
Departs
Lands
Arrive at SLC more than 15 minutes late?
Calm-weather odds: 10% · changed +0 pts in 24h
+0 pts
9%
Yes 9%
No 91%
Leave PDX more than 15 minutes late?
Calm-weather odds: 15% · changed +2 pts in 24h
+2 pts
15%
Yes 15%
No 85%
Arrive at SLC more than an hour late?
Calm-weather odds: 4% · 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 SLC?
On time or early
90%
15–30 min late
1%
30 min–1 hour late
5%
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
↑
Later flights pick up delays from earlier in the day
↑
Arrivals into SLC at that hour are often late
↓
This flight has been late 11% of the time recently
↓
Tuesdays in September are usually quieter than average
Weather at each end
PDX (origin)
Gusts 16 kt Ceiling 2,700 ft Visibility 7 mi Precip none
SLC (destination)
Gusts 15 kt Ceiling 6,500 ft Visibility 10+ 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.