About 1 in 5 F9 4689 flights from Dallas arrived 15+ minutes late, diverted or cancelled over the past year (20%); 0.8% were cancelled. The typical flight landed 10 minutes early.
F9 4689: DFW → ONT
Scheduled to leave Dallas at 5:46 p.m. local time. Over the past year it arrived on time 80% of the time (240 flights), worse than other F9 flights on the route at that hour (89%). Last seen in the data Aug 31, 2026.
Month by month
By day of week
| Day | Flights | On time |
|---|---|---|
| Monday | 37 | 70% |
| Tuesday | 27 | 81% |
| Wednesday | 27 | 81% |
| Thursday | 39 | 90% |
| Friday | 35 | 89% |
| Saturday | 31 | 81% |
| Sunday | 44 | 70% |
Why it was late
All flights DFW → ONT · Connecting off F9 4689? Check the risk
Questions
How often is F9 4689 from DFW to ONT late?
Frontier Airlines 4689 from Dallas/Fort Worth, TX to Ontario, CA arrived 15 or more minutes late, was diverted or was cancelled on 20% of 240 scheduled flights between September 2025 and August 2026. 0.8% 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.