Flight number record

F9 2440

Frontier Airlines · Denver to Raleigh

Route: DEN → RDU
Departs: 11:05
Flights: 285
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s F9 2440, check with Frontier Airlines.

F9 2440 earns an A. More than four flights in five arrive inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 9 points better than the national rate of 77.6%. When something does go wrong the average delay runs roughly 55 minutes. That rests on 285 flights, with a median arrival 11 minutes early.

Set against the rest of the country, F9 2440's record is 9 points better than the US average of 77.6%. That gap is worth roughly 85 fewer late arrivals for every thousand flights.

On time

86.1%

Arrivals under 15 minutes late, of 281 completed flights

Avg delay

54 min

Across delayed arrivals only, not all flights

Cancelled

1.40%

National rate is 1.81%

1 hour+ late

4.3%

National rate is 8.1%

These figures cover 285 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 2440 flies

F9 2440 flies DEN to RDU without a single fixed slot. Its most common scheduled departure was 11:05, used on 45 of 285 flights, with 06:03 (45 flights) and 13:21 (33 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 11:0545 flights15.8%
Departs 06:0345 flights15.8%
Departs 13:2133 flights11.6%

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 11:05 departure sits in the 11am–2pm window. Across every US flight scheduled in that window the on-time rate is 78.8%, and F9 2440 runs 7 points better at 86.1%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.

Against the route

F9 2440 next to DEN to RDU

Every carrier on DEN to RDU combined arrived on time 75.2% of the time across 1,768 flights, so F9 2440 is 11 points ahead of it. Across its whole network Frontier Airlines managed 73.2%, which this flight beats by 13 points.

F9 2440 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
F9 2440thin sample	285	86.1%	54 min	1.40%	A
All Frontier Airlines on DEN–RDUthin sample	285	86.1%	54 min	1.40%	A
All carriers on DEN–RDU	1,768	75.2%	55 min	0.74%	B+
Frontier Airlines, whole network	205,332	73.2%	84 min	1.85%	C

Across the year

F9 2440 quarter by quarter

Quarter by quarter F9 2440 held fairly steady: 85.1% in Jul–Sep 2025, 81.5% in Oct–Dec 2025, 88.7% in Jan–Mar 2026 and 88.5% in Apr–Jun 2026. A spread of 7 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.

Jul–Sep 202568 flights85.1%
Oct–Dec 202565 flights81.5%
Jan–Mar 202664 flights88.7%
Apr–Jun 202688 flights88.5%

Scale runs 75% to 95%. 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 79.6%. Each day rests on about 41 flights, so a gap of 18 points is worth noticing but could still narrow in another year.

Delay causes

Why F9 2440 runs late

One category carries most of the weight here. Carrier accounts for 48% of the 2,085 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.

Carrier
48%
Late-arriving aircraft
36%
National Airspace System
15%
Extreme weather
1%

36% 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 2,085 reported delay minutes here, that single category outweighs weather by 36 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 2,085 delay minutes reported on F9 2440.

Cancellations sit at 1.40% against a national 1.81%, 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 4.3% 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 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. 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 285 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. 285 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: 86.1% on time and 1.40% cancelled. That is a base rate, not a promise about any single day.

Where to go next

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.

Key figures