Schedule: the flights that flew on Sunday, Nov 8, re-dated. Real flights replace these once airlines file their FAA flight plans, usually about a day ahead.
SOUTHWEST · FLIGHT WN 4740
SCHEDULED · TYPICAL SCHEDULE
Sunday, November 15
WN 4740 · DEN → ONT
departs 6:29 PM MT · arrives 7:54 PM PT
Forecast issued Fri 5:00 PM ET · 52h before departure
Watch this flight
Other days
Today 69%
Sat 11/14 46%
Sun 11/15
Mon 11/16 36%
Thu 11/19 45%
Odds over time
Arrive at ONT more than 15 minutes late?
39%
chance · ±7 pts
– · 24h
HOW SURE WE ARE
Moderate. The odds now blend history with early weather forecasts.
Arrive 15+ late
39%
Leave 15+ late
54%
Arrive 1h+ late
7%
Cancelled
<1%
MOSTLY HISTORY
WEATHER FORECASTS
LIVE
IN THE AIR
0%
15%
30%
45%
60%
6.9d
Now
1d
12h
6h
Departs
Lands
Arrive at ONT more than 15 minutes late?
Calm-weather odds: 33% · changed – in 24h
–
39%
Yes 39%
No 61%
Leave DEN more than 15 minutes late?
Calm-weather odds: 50% · changed – in 24h
–
54%
Yes 54%
No 46%
Arrive at ONT more than an hour late?
Calm-weather odds: 6% · changed – in 24h
–
7%
Yes 7%
No 93%
Cancelled?
Calm-weather odds: <1% · changed – in 24h
–
<1%
Yes <1%
No 99%
How late will it get to ONT?
On time or early
61%
15–30 min late
21%
30 min–1 hour late
11%
1–2 hours late
5%
Over 2 hours late
2%
Cancelled
<1%
Gate arrival compared with the scheduled arrival. The ranges add up to 100%.
What’s moving the odds
↑
WN's recent on-time record
↑
6pm departures from DEN are often late
↑
Later flights pick up delays from earlier in the day
↓
Sundays in November are usually quieter than average
↓
Cloud base down to 967 ft forecast at DEN that day
Weather at each end
DEN (origin)
Gusts 12 kt Ceiling 1,100 ft Visibility 5 mi Precip none
ONT (destination)
Gusts 11 kt Ceiling none (clear) Visibility 8 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.