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.
SOUTHWEST · FLIGHT WN 3740
SCHEDULED · TYPICAL SCHEDULE
Tuesday, September 29 Today
WN 3740 · SLC → DEN
departs 3:10 PM MT · arrives 4:40 PM MT
Forecast issued Tue 3:00 PM ET · 2h before departure
Watch this flight
Other days
Today
Wed 9/30 71%
Thu 10/1 41%
Fri 10/2 36%
Sat 10/3 28%
Sun 10/4 32%
Mon 10/5 31%
Odds over time
Arrive at DEN more than 15 minutes late?
25%
chance · ±4 pts
−13 pts · 24h
HOW SURE WE ARE
High. The odds now come mostly from live FAA and airport data.
Arrive 15+ late
25%
Leave 15+ late
31%
Arrive 1h+ late
4%
Cancelled
<1%
WEATHER FORECASTS
LIVE
IN THE AIR
0%
25%
50%
75%
100%
2.9d
2d
1d
12h
6h
Now
Departs
Lands
Arrive at DEN more than 15 minutes late?
Calm-weather odds: 26% · changed −13 pts in 24h
−13 pts
25%
Yes 25%
No 75%
Leave SLC more than 15 minutes late?
Calm-weather odds: 31% · changed +5 pts in 24h
+5 pts
31%
Yes 31%
No 69%
Arrive at DEN 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 DEN?
On time or early
75%
15–30 min late
14%
30 min–1 hour late
7%
1–2 hours late
3%
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
↑
Arrivals into DEN at that hour are often late
↑
This flight has been late 45% of the time recently
↑
Later flights pick up delays from earlier in the day
↓
Tuesdays in September are usually quieter than average
↓
Mostly benign weather forecast at DEN
Weather at each end
SLC (origin)
Gusts 16 kt Ceiling 6,500 ft Visibility 10+ mi Precip none
DEN (destination)
Gusts 9 kt Ceiling 6,000 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.