No delays reported for F9 688 (DEN → DCA) as of 6:51 PM ET. It arrived on time 68.9% of the time in June-August 2026. When it was late, the average delay was 1h 4m. 1.3% of flights were cancelled. Right now there are no reported delays at DEN, DCA.
May not fly today
Next leg DEN → DCA, scheduled 11:25 AM local time. No delays at DEN right now. This flight number flew about 6 days a week in June-August 2026, so it may not operate today.
Cancellation risk: Low 1.3% of its flights were cancelled in June-August 2026.
Estimate from the schedule, live position and airport conditions, if this flight operates today. Check Frontier for official times.
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Route and schedule
| Leg | Scheduled | On time |
|---|---|---|
| DEN → DCA Denver, CO to Washington, DC | 11:25 AM → 4:59 PM | 69% |
Local times. Schedules change; check your booking.
How reliable is F9 688?
| Arrived on time (within 15 min) | 68.9% |
| Average delay when late | 64 min |
| Cancelled | 1.3% |
| Diverted | 2.6% |
| Flights tracked | 77 |
Best and worst days to fly F9 688
F9 688 was most reliable on Saturdays (83% on time) and least reliable on Thursdays (60%).
| Monday | |
| Tuesday | |
| Wednesday | Too few flights |
| Thursday | |
| Friday | |
| Saturday | |
| Sunday |
Why it runs late
| Late-arriving plane | |
| Airline (crew, maintenance) | |
| Air traffic system | |
| Extreme weather |
Share of delay minutes by cause, as reported by Frontier to the Department of Transportation.
Other flights DEN → DCA
All flights on this route, ranked
Live status at its airports
We show airport-wide airport status, not this flight's gate or live position. For that, check the Frontier app.
Frontier delays and what you're owed · Airline phone numbers
About this data
On-time history: U.S. Bureau of Transportation Statistics, Reporting Carrier On-Time Performance, June-August 2026. Live conditions: live airport status. "On time" means arriving within 15 minutes of schedule.
Common questions
Is F9 688 delayed today?
Right now there are no reported delays at DEN, DCA. Checked 6:51 PM ET. For this flight's gate and exact status, check the Frontier app.
Is F9 688 usually on time?
F9 688 arrived within 15 minutes of schedule 68.9% of the time in June-August 2026, with an average delay of 64 minutes when late.
How often is F9 688 cancelled?
1.3% of F9 688 flights were cancelled in June-August 2026.