Flight Reliability
F9 688 · Frontier Airlines
Denver → Washington (DEN–DCA)100% of its flights flew this route. The rest (RDU–DCA) are included in these numbers.
69
Usually Fine
WanderNerd Reliability Score
- 75%
- Arrive within 15 minutes
- 14 min
- Average arrival delay
- 1.3%
- Cancelled
- 6 min early
- Median arrival delay
Based on 315 historical flights. Data through May 2026.
What the data says
Friday is doing you no favors.
F9 688 arrived on time 88% of the time on Saturdays and just 67% on Fridays. That gap is worth planning around.
A bit behind the DEN–DCA route.
F9 688 arrived on time 75% of the time, versus 81% across the DEN–DCA route.
Ticking up lately.
F9 688 arrived on time 80% of the time over the last three months in the data, compared with 76% in the three months before that.
The breakdown
- Mon71%(51 flights)
- Tue68%(28 flights)
- Wed72%(25 flights)
- Thu78%(50 flights)
- Fri67%(51 flights)
- Sat88%(48 flights)
- Sun81%(52 flights)
- 9 AM–12 PM76%(304 flights)
- 6–9 PM—(1 flights)
82%
May
Jun 52% → May 82% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 52% | 25 |
| July 2025 | 67% | 24 |
| August 2025 | 77% | 26 |
| September 2025 | 76% | 25 |
| October 2025 | 81% | 26 |
| November 2025 | 85% | 27 |
| December 2025 | 72% | 29 |
| January 2026 | 78% | 27 |
| February 2026 | 77% | 22 |
| March 2026 | 79% | 24 |
| April 2026 | 78% | 23 |
| May 2026 | 82% | 27 |
- Departures on time
- 75%
- Diverted
- 1.9%
- Flights flown
- 305
- Months covered
- 12
Same route, other flights
Keep nerding
Based on 315 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.