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 4397
SCHEDULED · TYPICAL SCHEDULE
Tuesday, September 29 Today
WN 4397 · IND → LAS
departs 3:30 PM ET · arrives 4:25 PM PT
Forecast issued Tue 4:00 PM ET · 0h before departure
Watch this flight
Other days
Today
Wed 9/30 21%
Odds over time
Arrive at LAS more than 15 minutes late?
38%
chance · ±4 pts
+8 pts · 24h
HOW SURE WE ARE
Very high. The odds now come almost entirely from live conditions.
Arrive 15+ late
38%
Leave 15+ late
39%
Arrive 1h+ late
13%
Cancelled
<1%
WEATHER FORECASTS
LIVE
IN THE AIR
0%
20%
40%
60%
80%
2.8d
2d
1d
12h
6h
Departs
Lands
Arrive at LAS more than 15 minutes late?
Calm-weather odds: 37% · changed +8 pts in 24h
+8 pts
38%
Yes 38%
No 62%
Leave IND more than 15 minutes late?
Calm-weather odds: 39% · changed +11 pts in 24h
+11 pts
39%
Yes 39%
No 61%
Arrive at LAS more than an hour late?
Calm-weather odds: 11% · changed +7 pts in 24h
+7 pts
13%
Yes 13%
No 87%
Cancelled?
Calm-weather odds: <1% · changed +0 pts in 24h
+0 pts
<1%
Yes <1%
No 99%
How late will it get to LAS?
On time or early
61%
15–30 min late
12%
30 min–1 hour late
13%
1–2 hours late
9%
Over 2 hours late
4%
Cancelled
<1%
Gate arrival compared with the scheduled arrival. The ranges add up to 100%.
What’s moving the odds
↑
Mostly benign weather forecast at LAS
↑
LAS is prone to delays
↑
Arrivals into LAS at that hour are often late
↓
Tuesdays in September are usually quieter than average
↓
Mostly benign weather forecast at IND
Weather at each end
IND (origin)
Gusts 6 kt Ceiling none (clear) Visibility 10+ mi Precip none
LAS (destination)
Gusts 23 kt Ceiling 4,700 ft Visibility 7 mi Precip 0.07 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.