Flight number record
F9 2440
Frontier Airlines · Denver to Raleigh
- Route
- DEN → RDU
- Departs
- 06:03
- Flights
- 296
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s F9 2440, check with Frontier Airlines.
F9 2440 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 10 points better than the national rate of 77.3%. When something does go wrong the average delay runs about an hour. That rests on 296 flights, with a median arrival 11 minutes early.
Set against the rest of the country, F9 2440's record is 10 points better than the US average of 77.3%. That gap is worth roughly 101 fewer late arrivals for every thousand flights.
Key figures
On time
87.4%
Arrivals under 15 minutes late, of 293 completed flights
Avg delay
56 min
Across delayed arrivals only, not all flights
Cancelled
1.01%
National rate is 1.89%
1 hour+ late
4.4%
National rate is 8.3%
These figures cover 296 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 2440 flies
F9 2440 flies DEN to RDU without a single fixed slot. Its most common scheduled departure was 06:03, used on 93 of 296 flights, with 13:21 (33 flights) next.
- Departs 06:0393 flights31.4%
- Departs 13:2133 flights11.1%
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 06:03 departure sits in the 5am–8am window. Across every US flight scheduled in that window the on-time rate is 89.3%, and F9 2440 runs level with that at 87.4%. 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 2440 next to DEN to RDU
Every carrier on DEN to RDU combined arrived on time 76.0% of the time across 1,732 flights, so F9 2440 is 11 points ahead of it. Across its whole network Frontier Airlines managed 72.7%, which this flight beats by 15 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| F9 2440thin sample | 296 | 87.4% | 56 min | 1.01% | A |
| All Frontier Airlines on DEN–RDUthin sample | 296 | 87.4% | 56 min | 1.01% | A |
| All carriers on DEN–RDU | 1,732 | 76.0% | 57 min | 0.69% | B+ |
| Frontier Airlines, whole network | 213,022 | 72.7% | 84 min | 2.05% | C |
Across the year
F9 2440 quarter by quarter
F9 2440 did not run the same all year. Its best quarter was Jul–Sep 2026 at 93.5% on time and its weakest Oct–Dec 2025 at 81.5%, a swing of 12 points on roughly 74 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 202517 flights—
- Oct–Dec 202565 flights81.5%
- Jan–Mar 202664 flights88.7%
- Apr–Jun 202688 flights88.5%
- Jul–Sep 202662 flights93.5%
Scale runs 75% to 100%. Rows with fewer than 30 flights show a dash.
By weekday, F9 2440 did best on Saturday at 97.3% on time and worst on Sunday at 82.0%. Each day rests on about 42 flights, so a gap of 15 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late F9 2440 runs when it is late
F9 2440 often beats the schedule: 119 of 293 completed flights, 41%, arrived 15 minutes or more early. The 37 late arrivals split 15 under half an hour, 9 between 30 and 60 minutes, and 13 an hour or more.
- 15+ min early119 flights40.6%
- Within 15 min137 flights46.8%
- 15–29 min late15 flights5.1%
- 30–59 min late9 flights3.1%
- 1–2 hours late10 flights3.4%
- 2+ hours late3 flights1.0%
Scale runs 0% to 100%.
Share of 293 completed flights by arrival against schedule.
A late pushback is often recovered here: of 41 departures that left 15 minutes late or more, 13 still arrived on time. 9 flights left on time and still arrived late.
The worst days
Worst days for F9 2440
The latest arrival of the period was on 13 March 2026, 3 hours 34 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). The same cause led on three of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 13 March 2026 | 3 hours 34 minutes | Carrier |
| 8 February 2026 | 2 hours 29 minutes | Carrier |
| 6 March 2026 | 2 hours 27 minutes | Late-arriving aircraft |
| 28 December 2025 | 1 hour 51 minutes | Late-arriving aircraft |
| 24 November 2025 | 1 hour 48 minutes | Carrier |
Delay causes
Why F9 2440 runs late
Carrier accounts for 48% of the 2,066 delay minutes carriers reported here, and the remaining four split what is left.
- 48%Carrier
- 39%Late-arriving aircraft
- 13%National Airspace System
- 1%Extreme weather
39% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 2,066 reported delay minutes here, that single category outweighs weather by 39 to one. The split is drawn from 2,066 delay minutes reported on F9 2440.
Cancellations sit at 1.01% against a national 1.89%, which is ordinary. Diversions add another 0.00%.
Connections and routes
What a delay on this flight costs
Badly late arrivals are rare here: only 4.4% 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 1,436 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 296 flights under F9 2440 in the data flew DEN to RDU. 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. 296 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 2440
For a booking, F9 2440 has one of the better records a US domestic flight can show: 87.4% on time and 1.01% cancelled. That is a base rate, not a promise about any single day.
Related
Where to go next
- DEN to RDU, every carrier and departure
- RDU to DEN, the return direction
- United Airlines 2269 on the same route88.1%
- United Airlines 2671 on the same route76.8%
- Denver International (DEN) delay statistics
- Raleigh-Durham International (RDU) 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.