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 4078
SCHEDULED · TYPICAL SCHEDULE
Saturday, October 3 Tomorrow
WN 4078 · RNO → LAS
departs 7:55 PM PT · arrives 9:25 PM PT
Forecast issued Fri 1:00 PM ET · 34h before departure
Watch this flight
Other days
Today 42%
Sat 10/3
Sun 10/4 26%
Mon 10/5 13%
Wed 10/7 10%
Odds over time
Arrive at LAS more than 15 minutes late?
11%
chance · ±2 pts
+0 pts · 24h
HOW SURE WE ARE
Moderate. The odds now blend history with early weather forecasts.
Arrive 15+ late
11%
Leave 15+ late
26%
Arrive 1h+ late
5%
Cancelled
<1%
MOSTLY HISTORY
WEATHER FORECASTS
LIVE
IN THE AIR
0%
5%
10%
15%
20%
5.0d
2d
Now
1d
12h
6h
Departs
Lands
Arrive at LAS more than 15 minutes late?
Calm-weather odds: 9% · changed +0 pts in 24h
+0 pts
11%
Yes 11%
No 89%
Leave RNO more than 15 minutes late?
Calm-weather odds: 22% · changed +0 pts in 24h
+0 pts
26%
Yes 26%
No 74%
Arrive at LAS more than an hour late?
Calm-weather odds: 4% · changed +0 pts in 24h
+0 pts
5%
Yes 5%
No 95%
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
89%
15–30 min late
3%
30 min–1 hour late
3%
1–2 hours late
4%
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 LAS at that hour are often late
↓
Mostly benign weather forecast at LAS
↓
Mostly benign weather forecast at RNO
Weather at each end
RNO (origin)
Gusts 12 kt Ceiling none (clear) Visibility 10+ mi Precip none
LAS (destination)
Gusts 11 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.