Flight number record
F9 687
Frontier Airlines · Washington to Denver
- Route
- DCA → DEN
- Departs
- 14:00
- Flights
- 319
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s F9 687, check with Frontier Airlines.
F9 687 lands a B+, 3 points better than the national rate of 77.3%. About one flight in five arrives 15 minutes late or worse, and those flights are late by roughly 55 minutes on average. That rests on 319 flights, with a median arrival 8 minutes early.
Key figures
On time
80.7%
Arrivals under 15 minutes late, of 316 completed flights
Avg delay
53 min
Across delayed arrivals only, not all flights
Cancelled
0.63%
National rate is 1.89%
1 hour+ late
6.3%
National rate is 8.3%
These figures cover 319 flights between September 2025 and August 2026. The median arrival is 8 minutes early, which is the part an average hides: most flights here are fine, and the on-time rate is decided by a tail of badly late ones. On-time means under 15 minutes late, the DOT's own threshold.
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Schedule
When F9 687 flies
F9 687 flies DCA to DEN without a single fixed slot. Its most common scheduled departure was 14:00, used on 135 of 319 flights, with 13:59 (118 flights) and 13:00 (66 flights) next.
- Departs 14:00135 flights42.3%
- Departs 13:59118 flights37.0%
- Departs 13:0066 flights20.7%
Scale runs 0% to 100%.
Share of scheduled departures at each local time. Times used on fewer than one flight in ten are not listed.
A 14:00 departure sits in the 2pm–5pm window. Across every US flight scheduled in that window the on-time rate is 71.9%, and F9 687 runs 9 points better at 80.7%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.
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Against the route
F9 687 next to DCA to DEN
Every carrier on DCA to DEN combined arrived on time 78.2% of the time across 1,347 flights, so F9 687 is 3 points ahead of it. Frontier flew 983 flights on the same city pair under all its flight numbers, including this one, and those ran 78.1% on time. Across its whole network Frontier Airlines managed 72.7%, which this flight beats by 8 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| F9 687thin sample | 319 | 80.7% | 53 min | 0.63% | B+ |
| All Frontier Airlines on DCA–DEN | 983 | 78.1% | 81 min | 1.02% | B |
| All carriers on DCA–DEN | 1,347 | 78.2% | 82 min | 0.89% | B+ |
| Frontier Airlines, whole network | 213,022 | 72.7% | 84 min | 2.05% | C |
Across the year
F9 687 quarter by quarter
F9 687 did not run the same all year. Its best quarter was Oct–Dec 2025 at 87.7% on time and its weakest Apr–Jun 2026 at 70.1%, a swing of 18 points on roughly 80 flights a quarter. The twelve-month rate averages over that, so if you are flying in a weak quarter the quarter's own figure is the better guide.
- Jul–Sep 202524 flights—
- Oct–Dec 202581 flights87.7%
- Jan–Mar 202685 flights84.3%
- Apr–Jun 202677 flights70.1%
- Jul–Sep 202652 flights70.6%
Scale runs 60% to 95%. Rows with fewer than 30 flights show a dash.
By weekday, F9 687 did best on Saturday at 92.0% on time and worst on Wednesday at 69.8%. Each day rests on about 46 flights, so a gap of 22 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late F9 687 runs when it is late
F9 687 often beats the schedule: 115 of 316 completed flights, 36%, arrived 15 minutes or more early. The 61 late arrivals split 21 under half an hour, 20 between 30 and 60 minutes, and 20 an hour or more.
- 15+ min early115 flights36.4%
- Within 15 min140 flights44.3%
- 15–29 min late21 flights6.6%
- 30–59 min late20 flights6.3%
- 1–2 hours late14 flights4.4%
- 2+ hours late6 flights1.9%
Scale runs 0% to 100%.
Share of 316 completed flights by arrival against schedule.
9 of 40 late departures made up the time and arrived on time, 23% of them. In the other direction, 30 flights left on time yet arrived 15 minutes late or more, so that delay built up after pushback: in the air, in a holding pattern or on the ground at DEN.
The worst days
Worst days for F9 687
The latest arrival of the period was on 3 April 2026, 2 hours 25 minutes behind schedule; most of its delay minutes were filed as a late-arriving aircraft. The five worst days are spread across April, January, March and May, with no single month standing out.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 3 April 2026 | 2 hours 25 minutes | Late-arriving aircraft |
| 17 April 2026 | 2 hours 9 minutes | Carrier |
| 3 January 2026 | 2 hours 6 minutes | Late-arriving aircraft |
| 12 March 2026 | 2 hours 4 minutes | National Airspace System |
| 21 May 2026 | 2 hours 3 minutes | Carrier |
Delay causes
Why F9 687 runs late
National Airspace System accounts for 59% of the 3,211 delay minutes carriers reported here, and the remaining four split what is left.
- 59%National Airspace System
- 21%Carrier
- 17%Late-arriving aircraft
- 4%Extreme weather
59% of delay minutes are charged to the National Airspace System: air traffic volume, runway configuration, ground stops. No carrier can price its way out of that, which is why airport choice moves the number here more than carrier choice does. That is 1,889 minutes out of 3,211, against a national NAS share of 21%. The split is drawn from 3,211 delay minutes reported on F9 687.
Cancellations are rare at 0.63%, below the national 1.89% and low enough to earn the plus on the grade. Roughly one flight in 100 is called off; the risk here is arriving late, not not arriving.
Connections and routes
What a delay on this flight costs
6.3% of arrivals land an hour or more late, close to the national 8.3%, so a 60 to 75 minute layover is reasonable here while anything under 45 minutes is a bet. Most delays on this route last roughly 55 minutes, which a normal layover absorbs.
The 1,476 miles between these two airports put this in the middle of the US network, around two and a half to three hours of block time. That is enough cruise to absorb a ten-minute late pushback and not enough to absorb thirty.
Every one of the 319 flights under F9 687 in the data flew DCA to DEN. The number was not reused on any other city pair, which makes this a clean record of one route.
One caution: this is a thin sample. 319 flights over twelve months is enough to clear this site's floor but not enough to pin the rate down tightly, and a single bad week moves it by more than a point. Treat the grade as a rough reading.
What to do with this
Booking F9 687
For a booking, read F9 687 as 80.7% on time with 0.63% cancelled over 319 flights. Those are rates from the past twelve months, not a forecast for any particular day.
Related
Where to go next
- DCA to DEN, every carrier and departure
- DEN to DCA, the return direction
- United Airlines 746 on the same route78.3%
- Frontier Airlines 685 on the same route85.6%
- Frontier Airlines 689 on the same route66.7%
- Ronald Reagan Washington National (DCA) delay statistics
- Denver International (DEN) delay statistics
- Frontier Airlines on-time record
- Every Frontier Airlines flight number with a record
- The most and least reliable flight numbers in the US
- The best time of day to fly, according to 7.05 million flight records
A flight number here means Frontier Airlines’s own number as it reports to the DOT. How the figures are computed is on the methodology page.
Source: US DOT Bureau of Transportation Statistics, on-time performance data, September 2025 to August 2026. Last updated ; recomputed monthly. How this data is collected.