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.
SOUTHWEST · FLIGHT WN 1478
SCHEDULED · TYPICAL SCHEDULE
Sunday, October 4
WN 1478 · SLC → DEN
departs 2:40 PM MT · arrives 4:10 PM MT
Forecast issued Fri 9:00 AM ET · 56h before departure
Watch this flight
Other days
Today 31%
Sun 10/4
Mon 10/5 11%
Odds over time
Arrive at DEN more than 15 minutes late?
28%
chance · ±4 pts
– · 24h
HOW SURE WE ARE
Moderate. The odds now blend history with early weather forecasts.
Arrive 15+ late
28%
Leave 15+ late
31%
Arrive 1h+ late
5%
Cancelled
<1%
MOSTLY HISTORY
WEATHER FORECASTS
LIVE
IN THE AIR
0%
15%
30%
45%
60%
5.8d
Now
2d
1d
12h
6h
Departs
Lands
Arrive at DEN more than 15 minutes late?
Calm-weather odds: 19% · changed – in 24h
–
28%
Yes 28%
No 72%
Leave SLC more than 15 minutes late?
Calm-weather odds: 28% · changed – in 24h
–
31%
Yes 31%
No 69%
Arrive at DEN more than an hour late?
Calm-weather odds: 4% · changed – in 24h
–
5%
Yes 5%
No 95%
Cancelled?
Calm-weather odds: <1% · changed – in 24h
–
<1%
Yes <1%
No 100%
How late will it get to DEN?
On time or early
71%
15–30 min late
16%
30 min–1 hour late
8%
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
↑
Arrivals into DEN at that hour are often late
↑
WN's recent on-time record
↑
Other factors
↓
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
DEN (destination)
Gusts 27 kt Ceiling none (clear) 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.