Flight Reliability
F9 686 · Frontier Airlines
Denver → Washington (DEN–DCA)
100
Nerd Approved
WanderNerd Reliability Score
- 96%
- Arrive within 15 minutes
- 14 min early
- Average arrival delay
- 0.6%
- Cancelled
- 18 min early
- Median arrival delay
Based on 312 historical flights. Data through May 2026.
What the data says
Friday is doing you no favors.
F9 686 arrived on time 100% of the time on Tuesdays. On Fridays: 90%.
Better than the DEN–DCA route average.
F9 686 arrived on time 96% of the time, versus 81% across the DEN–DCA route.
Well ahead of the Frontier Airlines network.
F9 686 arrived on time 96% of the time, versus 73% across the Frontier Airlines network.
The breakdown
- Mon94%(51 flights)
- Tue100%(28 flights)
- Wed100%(30 flights)
- Thu92%(49 flights)
- Fri90%(51 flights)
- Sat98%(50 flights)
- Sun98%(51 flights)
100%
May
Jun 96% → May 100% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 96% | 23 |
| July 2025 | 92% | 26 |
| August 2025 | 100% | 27 |
| September 2025 | 96% | 24 |
| October 2025 | 100% | 27 |
| November 2025 | 96% | 25 |
| December 2025 | 96% | 26 |
| January 2026 | 89% | 26 |
| February 2026 | 96% | 27 |
| March 2026 | 96% | 27 |
| April 2026 | 88% | 25 |
| May 2026 | 100% | 27 |
- Departures on time
- 94%
- Diverted
- 0%
- Flights flown
- 310
- Months covered
- 12
Same route, other flights
Keep nerding
Based on 312 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.