Flight Reliability
F9 685 · Frontier Airlines
Washington → Denver (DCA–DEN)
90
Nerd Approved
WanderNerd Reliability Score
- 86%
- Arrive within 15 minutes
- 1 min early
- Average arrival delay
- 0.6%
- Cancelled
- 9 min early
- Median arrival delay
Based on 359 historical flights. Data through May 2026.
What the data says
Skip Tuesday if you can.
F9 685 arrived on time 94% of the time on Saturdays. On Tuesdays: 82%.
Better than the DCA–DEN route average.
F9 685 arrived on time 86% of the time, versus 79% across the DCA–DEN route.
Better than the Frontier Airlines network average.
F9 685 arrived on time 86% of the time, versus 73% across the Frontier Airlines network.
Trending in the right direction.
F9 685 arrived on time 91% of the time over the last three months in the data, compared with 78% in the three months before that.
The breakdown
- Mon87%(52 flights)
- Tue82%(49 flights)
- Wed84%(49 flights)
- Thu85%(52 flights)
- Fri86%(50 flights)
- Sat94%(52 flights)
- Sun85%(52 flights)
87%
May
Jun 93% → May 87% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 93% | 30 |
| July 2025 | 90% | 31 |
| August 2025 | 81% | 31 |
| September 2025 | 80% | 30 |
| October 2025 | 90% | 30 |
| November 2025 | 87% | 30 |
| December 2025 | 67% | 27 |
| January 2026 | 82% | 28 |
| February 2026 | 85% | 27 |
| March 2026 | 94% | 31 |
| April 2026 | 93% | 30 |
| May 2026 | 87% | 31 |
- Departures on time
- 92%
- Diverted
- 0.3%
- Flights flown
- 356
- Months covered
- 12
Same route, other flights
Keep nerding
Based on 359 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.