Flight Reliability
F9 1175 · Frontier Airlines
Denver → Seattle (DEN–SEA)
73
Usually Fine
WanderNerd Reliability Score
- 73%
- Arrive within 15 minutes
- 10 min
- Average arrival delay
- 1.9%
- Cancelled
- 2 min early
- Median arrival delay
Based on 162 historical flights. Data through May 2026.
What the data says
The 12–3 PM departure wins.
F9 1175 departing between 12–3 PM arrived on time 88% of the time, versus 59% between 3–6 PM.
Sunday scaries are real for this one.
F9 1175 arrived on time 77% of the time on Mondays. On Sundays: 65%.
Ticking up lately.
F9 1175 arrived on time 74% of the time over the last three months in the data, compared with 70% in the three months before that.
The breakdown
- Mon77%(30 flights)
- Tue—(7 flights)
- Wed—(8 flights)
- Thu73%(30 flights)
- Fri77%(30 flights)
- Sat65%(23 flights)
- Sun65%(31 flights)
- 6–9 AM86%(14 flights)
- 9 AM–12 PM78%(73 flights)
- 12–3 PM88%(17 flights)
- 3–6 PM59%(54 flights)
- 9 PM–12 AM—(1 flights)
90%
Feb
Jun 60% → Feb 90% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 60% | 20 |
| July 2025 | 61% | 18 |
| August 2025 | 65% | 23 |
| October 2025 | 83% | 24 |
| November 2025 | 74% | 19 |
| January 2026 | 60% | 15 |
| February 2026 | 90% | 19 |
- Departures on time
- 76%
- Diverted
- 0%
- Flights flown
- 159
- Months covered
- 12
Same route, other flights
Keep nerding
Based on 162 historical flights, because apparently we checked. Historical flight data: U.S. Bureau of Transportation Statistics, June 2025 – May 2026. Data through May 2026. How we calculate this.