About 5 in 10 F9 4156 flights from San Francisco arrived 15+ minutes late, diverted or cancelled over the past year (51%); 4.2% were cancelled. The typical flight landed 14 minutes late.
F9 4156: SFO → LAS
Scheduled to leave San Francisco at 9:00 p.m. local time. Over the past year it arrived on time 49% of the time (214 flights), better than other F9 flights on the route at that hour (33%). Last seen in the data Aug 31, 2026.
Usually Frontier Airlines's last flight of the day from San Francisco to Las Vegas (84% of days). Frontier Airlines's last SFO–LAS flight was cancelled 2.9% of the time, against 1.3% for its earlier ones. If it's cancelled, the next Frontier Airlines flight is usually around 11:20 a.m. the next morning.
Month by month
By day of week
| Day | Flights | On time |
|---|---|---|
| Monday | 51 | 45% |
| Tuesday | 5 | — |
| Wednesday | 9 | — |
| Thursday | 35 | 34% |
| Friday | 51 | 47% |
| Saturday | 21 | 76% |
| Sunday | 42 | 43% |
Why it was late
All flights SFO → LAS · Connecting off F9 4156? Check the risk
Questions
How often is F9 4156 from SFO to LAS late?
Frontier Airlines 4156 from San Francisco, CA to Las Vegas, NV arrived 15 or more minutes late, was diverted or was cancelled on 51% of 214 scheduled flights between September 2025 and August 2026. 4.2% 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.