About 1 in 4 F9 2231 flights from Las Vegas arrived 15+ minutes late, diverted or cancelled over the past year (24%); 1.2% were cancelled. The typical flight landed 12 minutes early.
F9 2231: LAS → ONT
Scheduled to leave Las Vegas at 8:13 p.m. local time. Over the past year it arrived on time 76% of the time (242 flights), better than other F9 flights on the route at that hour (71%). Last seen in the data Aug 31, 2026.
Usually Frontier Airlines's last flight of the day from Las Vegas to Ontario (86% of days). Frontier Airlines's last LAS–ONT flight was cancelled 1.4% of the time, against 0.6% for its earlier ones. If it's cancelled, the next Frontier Airlines flight is usually around 7:00 a.m. the next morning.
Month by month
By day of week
| Day | Flights | On time |
|---|---|---|
| Monday | 35 | 63% |
| Tuesday | 28 | 93% |
| Wednesday | 35 | 86% |
| Thursday | 34 | 74% |
| Friday | 36 | 56% |
| Saturday | 40 | 88% |
| Sunday | 34 | 76% |
Why it was late
All flights LAS → ONT · Connecting off F9 2231? Check the risk
Questions
How often is F9 2231 from LAS to ONT late?
Frontier Airlines 2231 from Las Vegas, NV to Ontario, CA arrived 15 or more minutes late, was diverted or was cancelled on 24% of 242 scheduled flights between September 2025 and August 2026. 1.2% were cancelled.
Flight numbers change. Figures cover flights with this airline, number and route only. "Likely range" is the 95% interval for the true on-time rate given the number of flights. This is history, not live status: check Frontier Airlines for today's flight. Method.