About 1 in 4 F9 3366 flights from Denver arrived 15+ minutes late, diverted or cancelled over the past year (24%); 0.7% were cancelled. The typical flight landed 3 minutes early.
F9 3366: DEN → DFW
Scheduled to leave Denver at 10:09 a.m. local time. Over the past year it arrived on time 76% of the time (138 flights), in line with other F9 flights on the route at that hour (77%). Last seen in the data Aug 31, 2026.
Month by month
By day of week
| Day | Flights | On time |
|---|---|---|
| Monday | 16 | — |
| Tuesday | 25 | 60% |
| Wednesday | 25 | 80% |
| Thursday | 16 | — |
| Friday | 17 | — |
| Saturday | 19 | — |
| Sunday | 20 | 80% |
Why it was late
All flights DEN → DFW · Connecting off F9 3366? Check the risk
Questions
How often is F9 3366 from DEN to DFW late?
Frontier Airlines 3366 from Denver, CO to Dallas/Fort Worth, TX arrived 15 or more minutes late, was diverted or was cancelled on 24% of 138 scheduled flights between September 2025 and August 2026. 0.7% 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.