Schedule: a typical summer Saturday (the flights of Jul 25, 2026), re-dated. Real flights replace these once airlines file their FAA flight plans, usually about a day ahead.
SOUTHWEST · FLIGHT WN 3739
SCHEDULED · TYPICAL SCHEDULE
Saturday, October 3 Tomorrow
WN 3739 · SLC → DEN
departs 10:40 AM MT · arrives 12:05 PM MT
Forecast issued Fri 7:00 PM ET · 18h before departure
Watch this flight
Other days
Today 14%
Sat 10/3
Mon 10/5 14%
Odds over time
Arrive at DEN more than 15 minutes late?
11%
chance · ±3 pts
−1 pt · 24h
HOW SURE WE ARE
Good. The odds now lean mostly on firmed-up weather forecasts.
Arrive 15+ late
11%
Leave 15+ late
11%
Arrive 1h+ late
2%
Cancelled
<1%
MOSTLY HISTORY
WEATHER FORECASTS
LIVE
IN THE AIR
0%
5%
10%
15%
20%
4.6d
2d
1d
Now
12h
6h
Departs
Lands
Arrive at DEN more than 15 minutes late?
Calm-weather odds: 10% · changed −1 pt in 24h
−1 pt
11%
Yes 11%
No 89%
Leave SLC more than 15 minutes late?
Calm-weather odds: 11% · changed +0 pts in 24h
+0 pts
11%
Yes 11%
No 89%
Arrive at DEN more than an hour late?
Calm-weather odds: 2% · changed +0 pts in 24h
+0 pts
2%
Yes 2%
No 98%
Cancelled?
Calm-weather odds: <1% · changed +0 pts in 24h
+0 pts
<1%
Yes <1%
No 100%
How late will it get to DEN?
On time or early
88%
15–30 min late
7%
30 min–1 hour late
2%
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
↑
This flight has been late 40% of the time recently
↑
Arrivals into DEN at that hour are often late
↑
Other factors
↓
Mostly benign weather forecast at SLC
↓
Mostly benign weather forecast at DEN
Weather at each end
SLC (origin)
Gusts 10 kt Ceiling none (clear) Visibility 10+ mi Precip none
DEN (destination)
Gusts 24 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.