Flight number record
F9 2147
Frontier Airlines · Dallas-Fort Worth to Denver
- Route
- DFW → DEN
- Departs
- 05:18
- Flights
- 354
- Period
- July 2025 to June 2026
Historical statistics for July 2025 to June 2026, not live status. For today’s F9 2147, check with Frontier Airlines.
F9 2147 earns an A. Close to nine flights in ten arrive inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 13 points better than the national rate of 77.6%. When something does go wrong the average delay runs a little over an hour. That rests on 354 flights, with a median arrival 11 minutes early.
Set against the rest of the country, F9 2147's record is 13 points better than the US average of 77.6%. That gap is worth roughly 129 fewer late arrivals for every thousand flights.
Key figures
On time
90.5%
Arrivals under 15 minutes late, of 348 completed flights
Avg delay
72 min
Across delayed arrivals only, not all flights
Cancelled
1.41%
National rate is 1.81%
1 hour+ late
1.7%
National rate is 8.1%
These figures cover 354 flights between July 2025 and June 2026. The median arrival is 11 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.
Schedule
When F9 2147 flies
F9 2147 flies DFW to DEN without a single fixed slot. Its most common scheduled departure was 05:18, used on 49 of 354 flights, with 06:00 (43 flights) and 07:15 (37 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.
- Departs 05:1849 flights13.8%
- Departs 06:0043 flights12.1%
- Departs 07:1537 flights10.5%
Scale runs 0% to 100%. Rows with fewer than 30 flights show a dash.
Share of scheduled departures at each local time. Times used on fewer than one flight in ten are not listed.
A 05:18 departure sits in the 5am–8am window. Across every US flight scheduled in that window the on-time rate is 89.3%, and F9 2147 runs level with that at 90.5%. Early departures usually start with an aircraft that has not flown yet that day, which is most of why the window does well.
Against the route
F9 2147 next to DFW to DEN
Every carrier on DFW to DEN combined arrived on time 69.4% of the time across 6,025 flights, so F9 2147 is 21 points ahead of it. Frontier flew 1,126 flights on the same city pair under all its flight numbers, including this one, and those ran 77.7% on time. Across its whole network Frontier Airlines managed 73.2%, which this flight beats by 17 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| F9 2147thin sample | 354 | 90.5% | 72 min | 1.41% | A |
| All Frontier Airlines on DFW–DEN | 1,126 | 77.7% | 84 min | 1.42% | B |
| All carriers on DFW–DEN | 6,025 | 69.4% | 75 min | 2.32% | C |
| Frontier Airlines, whole network | 205,332 | 73.2% | 84 min | 1.85% | C |
Across the year
F9 2147 quarter by quarter
Quarter by quarter F9 2147 held fairly steady: 88.9% in Jul–Sep 2025, 93.4% in Oct–Dec 2025, 89.7% in Jan–Mar 2026 and 90.0% in Apr–Jun 2026. A spread of 5 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.
- Jul–Sep 202592 flights88.9%
- Oct–Dec 202592 flights93.4%
- Jan–Mar 202690 flights89.7%
- Apr–Jun 202680 flights90.0%
Scale runs 80% to 100%. Rows with fewer than 30 flights show a dash.
By weekday, F9 2147 did best on Sunday at 100.0% on time and worst on Wednesday at 80.4%. Each day rests on about 51 flights, so a gap of 20 points is worth noticing but could still narrow in another year.
Delay causes
Why F9 2147 runs late
One category carries most of the weight here. Late-arriving aircraft accounts for 45% of the 2,385 delay minutes carriers reported, and the remaining four split what is left. The split is by minutes rather than by flights, so a few very long delays count for as much as many short ones.
- 45%Late-arriving aircraft
- 36%Carrier
- 17%National Airspace System
- 3%Extreme weather
45% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. That is a cascade, and cascades start small and grow through the day. Across 2,385 reported delay minutes here, that single category outweighs weather by 17 to one. It is the strongest argument for booking the first departure of the morning, when the aircraft has been sitting at the gate overnight with nothing to inherit. The split is drawn from 2,385 delay minutes reported on F9 2147.
Cancellations sit at 1.41% against a national 1.81%, which is ordinary. Diversions add another 0.28%.
Connections and routes
What a delay on this flight costs
Badly late arrivals are rare here: only 1.7% land an hour or more behind schedule, against 8.1% nationally. Connections built on this flight are about as safe as US domestic connections get, though a cancelled flight still ignores every layover you give it.
The 641 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. It is also long enough that the aircraft usually flies three or four legs a day rather than six, which slows how fast delay compounds.
Every one of the 354 flights under F9 2147 in the data flew DFW 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. 354 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 2147
For a booking, F9 2147 has one of the better records a US domestic flight can show: 90.5% on time and 1.41% cancelled. That is a base rate, not a promise about any single day.
Related
Where to go next
- DFW to DEN, every carrier and departure
- DEN to DFW, the return direction
- American Airlines 420 on the same route77.5%
- American Airlines 1832 on the same route60.3%
- American Airlines 1322 on the same route45.2%
- American Airlines 577 on the same route51.0%
- United Airlines 2049 on the same route84.2%
- American Airlines 1523 on the same route78.5%
- Dallas/Fort Worth International (DFW) 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
- Why the first flight of the morning is statistically safest
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, July 2025 to June 2026. Last updated 15 September 2026; recomputed monthly. How this data is collected.