Schedule: a typical summer Monday (the flights of Jul 27, 2026), re-dated. Real flights replace these once airlines file their FAA flight plans, usually about a day ahead.
SOUTHWEST · FLIGHT WN 4080
SCHEDULED · TYPICAL SCHEDULE
Monday, October 5 Tomorrow
WN 4080 · DEN → ONT
departs 10:55 AM MT · arrives 12:10 PM PT
Forecast issued Sun 9:00 AM ET · 28h before departure
Watch this flight
Other days
Today 23%
Mon 10/5
Fri 10/9 16%
Odds over time
Arrive at ONT more than 15 minutes late?
13%
chance · ±2 pts
+0 pts · 24h
HOW SURE WE ARE
Moderate. The odds now blend history with early weather forecasts.
Arrive 15+ late
13%
Leave 15+ late
19%
Arrive 1h+ late
3%
Cancelled
<1%
MOSTLY HISTORY
WEATHER FORECASTS
LIVE
IN THE AIR
0%
5%
10%
15%
20%
6.5d
2d
Now
12h
6h
Departs
Lands
Arrive at ONT more than 15 minutes late?
Calm-weather odds: 12% · changed +0 pts in 24h
+0 pts
13%
Yes 13%
No 87%
Leave DEN more than 15 minutes late?
Calm-weather odds: 19% · changed +0 pts in 24h
+0 pts
19%
Yes 19%
No 81%
Arrive at ONT more than an hour late?
Calm-weather odds: 2% · changed +0 pts in 24h
+0 pts
3%
Yes 3%
No 97%
Cancelled?
Calm-weather odds: <1% · changed +0 pts in 24h
+0 pts
<1%
Yes <1%
No 100%
How late will it get to ONT?
On time or early
86%
15–30 min late
6%
30 min–1 hour late
5%
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 30% of the time recently
↑
Other factors
↑
DEN is busy at that time
↓
Mostly benign weather forecast at DEN
↓
Mondays in October are usually quieter than average
Weather at each end
DEN (origin)
Gusts 19 kt Ceiling none (clear) Visibility 10+ mi Precip none
ONT (destination)
Gusts 15 kt Ceiling none (clear) Visibility 9 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.