Schedule: a typical summer Friday (the flights of Jul 31, 2026), re-dated. Real flights replace these once airlines file their FAA flight plans, usually about a day ahead.
SOUTHWEST · FLIGHT WN 3159
SCHEDULED · TYPICAL SCHEDULE
Friday, October 2
WN 3159 · ONT → PHX
departs 5:15 PM PT · arrives 6:35 PM MT
Forecast issued Fri 10:00 PM ET · 2h after departure
Watch this flight
Other days
Fri 10/2
Mon 10/5 19%
Fri 10/9 28%
Odds over time
Arrive at PHX more than 15 minutes late?
26%
chance · ±0 pts
−5 pts · 24h
HOW SURE WE ARE
Very high. The odds now come almost entirely from live conditions.
Arrive 15+ late
26%
Leave 15+ late
31%
Arrive 1h+ late
8%
Cancelled
<1%
WEATHER FORECASTS
LIVE
IN THE AIR
0%
15%
30%
45%
60%
3.9d
2d
1d
12h
6h
Departs
Lands
Arrive at PHX more than 15 minutes late?
Calm-weather odds: 26% · changed −5 pts in 24h
−5 pts
26%
Yes 26%
No 74%
Leave ONT more than 15 minutes late?
Calm-weather odds: 31% · changed +0 pts in 24h
+0 pts
31%
Yes 31%
No 69%
Arrive at PHX more than an hour late?
Calm-weather odds: 9% · changed +0 pts in 24h
+0 pts
8%
Yes 8%
No 92%
Cancelled?
Calm-weather odds: <1% · changed +0 pts in 24h
+0 pts
<1%
Yes <1%
No 99%
How late will it get to PHX?
On time or early
74%
15–30 min late
11%
30 min–1 hour late
7%
1–2 hours late
6%
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
↑
Arrivals into PHX at that hour are often late
↑
Later flights pick up delays from earlier in the day
↑
WN's recent on-time record
↓
Mostly benign weather forecast at PHX
↓
Mostly benign weather forecast at ONT
Weather at each end
ONT (origin)
Gusts 11 kt Ceiling none (clear) Visibility 8 mi Precip none
PHX (destination)
Gusts 22 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.