About 1 in 2 F9 4000 flights from San Francisco arrived 15+ minutes late, diverted or cancelled over the past year (42%); 4.7% were cancelled. The typical flight landed 5 minutes late.
F9 4000: SFO → DFW
Scheduled to leave San Francisco at 11:59 p.m. local time. Over the past year it arrived on time 58% of the time (190 flights), better than other F9 flights on the route at that hour (51%). Last seen in the data Aug 11, 2026.
Month by month
By day of week
| Day | Flights | On time |
|---|---|---|
| Monday | 38 | 55% |
| Tuesday | 18 | — |
| Wednesday | 14 | — |
| Thursday | 30 | 63% |
| Friday | 37 | 70% |
| Saturday | 19 | — |
| Sunday | 34 | 53% |
Why it was late
All flights SFO → DFW · Connecting off F9 4000? Check the risk
Questions
How often is F9 4000 from SFO to DFW late?
Frontier Airlines 4000 from San Francisco, CA to Dallas/Fort Worth, TX arrived 15 or more minutes late, was diverted or was cancelled on 42% of 190 scheduled flights between September 2025 and August 2026. 4.7% 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.