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 670
SCHEDULED · TYPICAL SCHEDULE
Friday, October 2 Today
WN 670 · ONT → SMF
departs 3:40 PM PT · arrives 5:05 PM PT
Forecast issued Fri 2:00 PM ET · 5h before departure
Watch this flight
Other days
Today
Sun 10/4 25%
Mon 10/5 11%
Wed 10/7 8%
Odds over time
Arrive at SMF more than 15 minutes late?
30%
chance · ±0 pts
+10 pts · 24h
HOW SURE WE ARE
High. The odds now come mostly from live FAA and airport data.
Arrive 15+ late
30%
Leave 15+ late
42%
Arrive 1h+ late
11%
Cancelled
5%
WEATHER FORECASTS
LIVE
IN THE AIR
0%
10%
20%
30%
40%
3.9d
2d
1d
12h
Now
Departs
Lands
Arrive at SMF more than 15 minutes late?
Calm-weather odds: 14% · changed +10 pts in 24h
+10 pts
30%
Yes 30%
No 70%
Leave ONT more than 15 minutes late?
Calm-weather odds: 28% · changed +11 pts in 24h
+11 pts
42%
Yes 42%
No 58%
Arrive at SMF more than an hour late?
Calm-weather odds: 5% · changed +4 pts in 24h
+4 pts
11%
Yes 11%
No 89%
Cancelled?
Calm-weather odds: <1% · changed +4 pts in 24h
+4 pts
5%
Yes 5%
No 95%
How late will it get to SMF?
On time or early
67%
15–30 min late
17%
30 min–1 hour late
0%
1–2 hours late
9%
Over 2 hours late
2%
Cancelled
5%
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
↑
WN's recent on-time record
↑
Arrivals into SMF at that hour are often late
↓
Mostly benign weather forecast at SMF
↓
Mostly benign weather forecast at ONT
Weather at each end
ONT (origin)
Gusts 16 kt Ceiling none (clear) Visibility 8 mi Precip none
SMF (destination)
Gusts 5 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.