Likely delayed: there are delays at F9 4401's airports as of 6:45 PM ET. It arrived on time 37.8% of the time in June-August 2026. When it was late, the average delay was 1h 22m. None were cancelled. SFO has major delays (wind, max 5 hours and 41 minutes), so this flight is likely to be delayed.
Looks on time
Should be in the air from LAS, scheduled to land at SFO at 4:36 PM local time.
Cancellation risk: Medium 0% of its flights were cancelled in June-August 2026; SFO has major delays.
Estimate from the schedule, live position and airport conditions, if this flight operates today. Check Frontier for official times.
Before you fly
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Route and schedule
| Leg | Scheduled | On time |
|---|---|---|
| LAS → SFO Las Vegas, NV to San Francisco, CA | 2:48 PM → 4:36 PM | 38% |
Local times. Schedules change; check your booking.
How reliable is F9 4401?
| Arrived on time (within 15 min) | 37.8% |
| Average delay when late | 82 min |
| Cancelled | 0% |
| Diverted | 0% |
| Flights tracked | 90 |
Best and worst days to fly F9 4401
F9 4401 was most reliable on Saturdays (82% on time) and least reliable on Wednesdays (15%).
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Why it runs late
| Late-arriving plane | |
| Airline (crew, maintenance) | |
| Air traffic system | |
| Extreme weather |
Share of delay minutes by cause, as reported by Frontier to the Department of Transportation.
Other flights LAS → SFO
All flights on this route, ranked
Live status at its airports
We show airport-wide airport status, not this flight's gate or live position. For that, check the Frontier app.
Frontier delays and what you're owed · Airline phone numbers
About this data
On-time history: U.S. Bureau of Transportation Statistics, Reporting Carrier On-Time Performance, June-August 2026. Live conditions: live airport status. "On time" means arriving within 15 minutes of schedule.
Common questions
Is F9 4401 delayed today?
SFO has major delays (wind, max 5 hours and 41 minutes), so this flight is likely to be delayed. Checked 6:45 PM ET. For this flight's gate and exact status, check the Frontier app.
Is F9 4401 usually on time?
F9 4401 arrived within 15 minutes of schedule 37.8% of the time in June-August 2026, with an average delay of 82 minutes when late.
How often is F9 4401 cancelled?
0% of F9 4401 flights were cancelled in June-August 2026.