Schedule: a typical Saturday (the flights of Jul 25, 2026, re-dated). Real flights replace these once the FAA publishes them, usually about a day ahead.
FRONTIER · FLIGHT F9 4689
SCHEDULED · TYPICAL SCHEDULE
Saturday, October 3
F9 4689 · DFW → ONT
departs 7:31 AM CT · arrives 8:37 AM PT
Forecast issued Thu 6:00 PM ET · 38h before departure
Watch this flight
Other days
Today 66%
Fri 10/2 37%
Sat 10/3
Sun 10/4 21%
Mon 10/5 22%
Tue 10/6 16%
Wed 10/7 16%
Odds over time
Arrive at ONT more than 15 minutes late?
31%
chance · ±1 pts
−1 pt · 24h
HOW SURE WE ARE
Moderate. The odds now blend history with early weather forecasts.
Arrive 15+ late
31%
Leave 15+ late
27%
Arrive 1h+ late
10%
Cancelled
2%
MOSTLY HISTORY
WEATHER FORECASTS
LIVE
IN THE AIR
0%
10%
20%
30%
40%
4.4d
2d
Now
1d
12h
6h
Departs
Lands
Arrive at ONT more than 15 minutes late?
Calm-weather odds: 19% · changed −1 pt in 24h
−1 pt
31%
Yes 31%
No 69%
Leave DFW more than 15 minutes late?
Calm-weather odds: 17% · changed +3 pts in 24h
+3 pts
27%
Yes 27%
No 73%
Arrive at ONT more than an hour late?
Calm-weather odds: 5% · changed −1 pt in 24h
−1 pt
10%
Yes 10%
No 90%
Cancelled?
Calm-weather odds: <1% · changed +0 pts in 24h
+0 pts
2%
Yes 2%
No 98%
How late will it get to ONT?
On time or early
67%
15–30 min late
18%
30 min–1 hour late
3%
1–2 hours late
7%
Over 2 hours late
3%
Cancelled
2%
Gate arrival compared with the scheduled arrival. The ranges add up to 100%.
What’s moving the odds
↑
Cloud base down to 500 ft, 0.4 in of rain forecast at DFW that day
↑
F9's recent on-time record
↑
DFW is prone to delays
↓
Early flights usually leave on time
↓
Mostly benign weather forecast at ONT
Weather at each end
DFW (origin)
Gusts 14 kt Ceiling 500 ft Visibility 4 mi Precip 0.35 in
ONT (destination)
Gusts 14 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.