Flight number record
F9 2147
Frontier Airlines · Dallas-Fort Worth to Denver
- Route
- DFW → DEN
- Departs
- 05:18
- Flights
- 348
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 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 77.3%. When something does go wrong the average delay runs an hour and a half. That rests on 348 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 77.3%. That gap is worth roughly 134 fewer late arrivals for every thousand flights.
Key figures
On time
90.7%
Arrivals under 15 minutes late, of 343 completed flights
Avg delay
84 min
Across delayed arrivals only, not all flights
Cancelled
1.15%
National rate is 1.89%
1 hour+ late
1.5%
National rate is 8.3%
These figures cover 348 flights between September 2025 and August 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.
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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 88 of 348 flights, with 06:00 (43 flights) and 05:45 (35 flights) next.
- Departs 05:1888 flights25.3%
- Departs 06:0043 flights12.4%
- Departs 05:4535 flights10.1%
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 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 90.7%. Early departures usually start with an aircraft that has not flown yet that day, which is most of why the window does well.
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Against the route
F9 2147 next to DFW to DEN
Every carrier on DFW to DEN combined arrived on time 70.5% of the time across 6,059 flights, so F9 2147 is 20 points ahead of it. Frontier flew 1,201 flights on the same city pair under all its flight numbers, including this one, and those ran 77.3% on time. Across its whole network Frontier Airlines managed 72.7%, which this flight beats by 18 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| F9 2147thin sample | 348 | 90.7% | 84 min | 1.15% | A |
| All Frontier Airlines on DFW–DEN | 1,201 | 77.3% | 88 min | 1.08% | B |
| All carriers on DFW–DEN | 6,059 | 70.5% | 75 min | 1.93% | C |
| Frontier Airlines, whole network | 213,022 | 72.7% | 84 min | 2.05% | C |
Across the year
F9 2147 quarter by quarter
Quarter by quarter F9 2147 held fairly steady: 93.3% in Jul–Sep 2025, 93.4% in Oct–Dec 2025, 89.7% in Jan–Mar 2026, 90.0% in Apr–Jun 2026 and 87.3% in Jul–Sep 2026. A spread of 6 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.
- Jul–Sep 202530 flights93.3%
- Oct–Dec 202592 flights93.4%
- Jan–Mar 202690 flights89.7%
- Apr–Jun 202680 flights90.0%
- Jul–Sep 202656 flights87.3%
Scale runs 80% to 100%.
By weekday, F9 2147 did best on Sunday at 100.0% on time and worst on Wednesday at 82.4%. Each day rests on about 50 flights, so a gap of 18 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late F9 2147 runs when it is late
F9 2147 often beats the schedule: 138 of 343 completed flights, 40%, arrived 15 minutes or more early. Most of the lateness is short. 16 of the 32 late arrivals were under half an hour behind, and 5 reached an hour or more.
- 15+ min early138 flights40.2%
- Within 15 min173 flights50.4%
- 15–29 min late16 flights4.7%
- 30–59 min late11 flights3.2%
- 1–2 hours late2 flights0.6%
- 2+ hours late3 flights0.9%
Scale runs 0% to 100%.
Share of 343 completed flights by arrival against schedule.
6 of 26 late departures made up the time and arrived on time, 23% of them. 12 flights left on time and still arrived late.
The worst days
Worst days for F9 2147
The latest arrival of the period was on 26 November 2025, 15 hours 59 minutes behind schedule; most of its delay minutes were filed as a late-arriving aircraft. On three of the five worst days the largest share was filed as carrier-caused (crew, maintenance, fuelling, baggage).
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 26 November 2025 | 15 hours 59 minutes | Late-arriving aircraft |
| 21 August 2026 | 8 hours 9 minutes | Late-arriving aircraft |
| 14 February 2026 | 5 hours 3 minutes | Carrier |
| 23 April 2026 | 1 hour 39 minutes | Carrier |
| 16 March 2026 | 1 hour 3 minutes | Carrier |
Delay causes
Why F9 2147 runs late
Late-arriving aircraft accounts for 58% of the 2,677 delay minutes carriers reported here, and the remaining four split what is left.
- 58%Late-arriving aircraft
- 27%Carrier
- 13%National Airspace System
- 1%Extreme weather
58% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 2,677 reported delay minutes here, that single category outweighs weather by 50 to one. The split is drawn from 2,677 delay minutes reported on F9 2147.
Cancellations sit at 1.15% against a national 1.89%, which is ordinary. Diversions add another 0.29%.
Connections and routes
What a delay on this flight costs
Badly late arrivals are rare here: only 1.5% land an hour or more behind schedule, against 8.3% 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.
Every one of the 348 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. 348 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: 90.7% on time and 1.15% 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 route74.7%
- American Airlines 1832 on the same route60.0%
- American Airlines 1322 on the same route47.4%
- American Airlines 577 on the same route51.3%
- United Airlines 248 on the same route81.8%
- United Airlines 2049 on the same route84.3%
- 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, September 2025 to August 2026. Last updated ; recomputed monthly. How this data is collected.