About 1 in 6 F9 1175 flights from Denver arrived 15+ minutes late, diverted or cancelled over the past year (18%); 2.1% were cancelled. The typical flight landed 8 minutes early.
F9 1175: DEN → SEA
Scheduled to leave Denver at 9:13 a.m. local time. Over the past year it arrived on time 82% of the time (189 flights), in line with other F9 flights on the route at that hour (83%). Last seen in the data Aug 31, 2026.
Usually Frontier Airlines's last flight of the day from Denver to Seattle (61% of days). Frontier Airlines's last DEN–SEA flight was cancelled 3.5% of the time, against 0.0% for its earlier ones. If it's cancelled, the next Frontier Airlines flight is usually around 7:15 a.m. the next morning.
Month by month
By day of week
| Day | Flights | On time |
|---|---|---|
| Monday | 32 | 81% |
| Tuesday | 19 | — |
| Wednesday | 20 | 85% |
| Thursday | 32 | 81% |
| Friday | 32 | 69% |
| Saturday | 23 | 91% |
| Sunday | 31 | 77% |
Why it was late
All flights DEN → SEA · Connecting off F9 1175? Check the risk
Questions
How often is F9 1175 from DEN to SEA late?
Frontier Airlines 1175 from Denver, CO to Seattle, WA arrived 15 or more minutes late, was diverted or was cancelled on 18% of 189 scheduled flights between September 2025 and August 2026. 2.1% 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.