Schedule: a typical Wednesday (the flights of Jul 29, 2026, re-dated). Real flights replace these once the FAA publishes them, usually about a day ahead.
FRONTIER · FLIGHT F9 2678
SCHEDULED · TYPICAL SCHEDULE
Wednesday, September 30 Today
F9 2678 · SFO → ONT
departs 11:15 AM PT · arrives 12:53 PM PT
Forecast issued Wed 10:00 PM ET · 8h after departure
Watch this flight
Other days
Wed 9/30
Today 35%
Fri 10/2 31%
Sat 10/3 23%
Sun 10/4 22%
Mon 10/5 23%
Tue 10/6 27%
Wed 10/7 27%
Odds over time
Arrive at ONT more than 15 minutes late?
33%
chance · ±0 pts
−8 pts · 24h
HOW SURE WE ARE
Very high. The odds now come almost entirely from live conditions.
Arrive 15+ late
33%
Leave 15+ late
25%
Arrive 1h+ late
8%
Cancelled
1%
WEATHER FORECASTS
LIVE
IN THE AIR
0%
15%
30%
45%
60%
2.9d
2d
1d
12h
6h
Departs
Lands
Arrive at ONT more than 15 minutes late?
Calm-weather odds: 33% · changed −8 pts in 24h
−8 pts
33%
Yes 33%
No 67%
Leave SFO more than 15 minutes late?
Calm-weather odds: 25% · changed −8 pts in 24h
−8 pts
25%
Yes 25%
No 75%
Arrive at ONT more than an hour late?
Calm-weather odds: 8% · changed −5 pts in 24h
−5 pts
8%
Yes 8%
No 92%
Cancelled?
Calm-weather odds: 1% · changed −1 pt in 24h
−1 pt
1%
Yes 1%
No 99%
How late will it get to ONT?
On time or early
66%
15–30 min late
15%
30 min–1 hour late
9%
1–2 hours late
3%
Over 2 hours late
5%
Cancelled
1%
Gate arrival compared with the scheduled arrival. The ranges add up to 100%.
What’s moving the odds
↑
11am departures from SFO are often late
↑
F9's recent on-time record
↑
This flight has been late 39% of the time recently
↓
Mostly benign weather forecast at SFO
↓
Mostly benign weather forecast at ONT
Weather at each end
SFO (origin)
Gusts 22 kt Ceiling none (clear) Visibility 10+ mi Precip none
ONT (destination)
Gusts 18 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.