Flight Reliability
F9 3405 · Frontier Airlines
Denver → Seattle (DEN–SEA)
49
Bring Snacks
WanderNerd Reliability Score
- 57%
- Arrive within 15 minutes
- 24 min
- Average arrival delay
- 2.3%
- Cancelled
- 6 min
- Median arrival delay
Based on 86 historical flights. Data through May 2026.
What the data says
Friday is doing you no favors.
F9 3405 arrived on time 61% of the time on Mondays. On Fridays: 50%.
Well behind the DEN–SEA route.
F9 3405 arrived on time 57% of the time, versus 74% across the DEN–SEA route.
Well behind the Frontier Airlines network.
F9 3405 arrived on time 57% of the time, versus 73% across the Frontier Airlines network.
The breakdown
- Mon61%(18 flights)
- Tue—(0 flights)
- Wed55%(11 flights)
- Thu56%(18 flights)
- Fri50%(18 flights)
- Sat—(1 flights)
- Sun61%(18 flights)
- 9 AM–12 PM—(1 flights)
- 9 PM–12 AM57%(83 flights)
77%
Sep
Jun 50% → Sep 77% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 50% | 22 |
| July 2025 | 48% | 21 |
| August 2025 | 55% | 20 |
| September 2025 | 77% | 17 |
- Departures on time
- 50%
- Diverted
- 0%
- Flights flown
- 84
- Months covered
- 6
Same route, other flights
Keep nerding
Based on 86 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.