Flight number record
F9 2400
Frontier Airlines · Houston to Atlanta
- Route
- IAH → ATL
- Departs
- 18:05
- Flights
- 278
- Period
- July 2025 to June 2026
Historical statistics for July 2025 to June 2026, not live status. For today’s F9 2400, check with Frontier Airlines.
F9 2400 earns an F, which is as low as this site's scale goes for a reason. Only 53.3% of flights arrive inside the 15-minute window, 24 points worse than the national rate of 77.6%. Late arrivals average an hour and a half. Treat any tight connection here as a coin flip. That rests on 278 flights, with a median arrival 10 minutes late.
The national on-time rate over the same period is 77.6%, so F9 2400 runs 24 points behind the country as a whole. Across a thousand flights that is about 243 extra late arrivals.
Key figures
On time
53.3%
Arrivals under 15 minutes late, of 272 completed flights
Avg delay
82 min
Across delayed arrivals only, not all flights
Cancelled
2.16%
National rate is 1.81%
1 hour+ late
21.0%
National rate is 8.1%
These figures cover 278 flights between July 2025 and June 2026. Beyond the headline rate, 21.0% of arrivals land a full hour or more behind schedule. That is the number that wrecks a connection, and it is not visible in an on-time percentage alone.
Schedule
When F9 2400 flies
F9 2400 flies IAH to ATL without a single fixed slot. Its most common scheduled departure was 18:05, used on 35 of 278 flights. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.
- Departs 18:0535 flights12.6%
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 18:05 departure sits in the 5pm–8pm window. Across every US flight scheduled in that window the on-time rate is 68.2%, and F9 2400 runs 15 points worse at 53.3%. By that time of day most aircraft have flown several legs already, and whatever went wrong earlier is still in the schedule.
Against the route
F9 2400 next to IAH to ATL
Every carrier on IAH to ATL combined arrived on time 77.5% of the time across 4,906 flights, so F9 2400 is 24 points behind it. Frontier flew 767 flights on the same city pair under all its flight numbers, including this one, and those ran 61.7% on time. Across its whole network Frontier Airlines managed 73.2%, which this flight trails by 20 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| F9 2400thin sample | 278 | 53.3% | 82 min | 2.16% | F |
| All Frontier Airlines on IAH–ATL | 767 | 61.7% | 68 min | 2.22% | D |
| All carriers on IAH–ATL | 4,906 | 77.5% | 67 min | 1.92% | B |
| Frontier Airlines, whole network | 205,332 | 73.2% | 84 min | 1.85% | C |
Across the year
F9 2400 quarter by quarter
Quarter by quarter F9 2400 held fairly steady: 51.3% in Jul–Sep 2025, 57.7% in Oct–Dec 2025, 54.4% in Jan–Mar 2026 and 49.1% in Apr–Jun 2026. A spread of 9 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.
- Jul–Sep 202579 flights51.3%
- Oct–Dec 202574 flights57.7%
- Jan–Mar 202670 flights54.4%
- Apr–Jun 202655 flights49.1%
Scale runs 40% to 65%. Rows with fewer than 30 flights show a dash.
By weekday, F9 2400 did best on Saturday at 69.4% on time and worst on Monday at 42.1%. Each day rests on about 40 flights, so a gap of 27 points is worth noticing but could still narrow in another year.
Delay causes
Why F9 2400 runs late
One category carries most of the weight here. Late-arriving aircraft accounts for 52% of the 10,000 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.
- 52%Late-arriving aircraft
- 25%Carrier
- 22%National Airspace System
- 1%Extreme weather
52% 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 10,000 reported delay minutes here, that single category outweighs weather by 43 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 10,454 delay minutes reported on F9 2400.
Cancellations sit at 2.16% against a national 1.81%, which is ordinary. Diversions add another 0.00%.
Connections and routes
What a delay on this flight costs
For anyone connecting, the number to weigh is not the on-time rate but the tail behind it. 21.0% of arrivals land a full hour or more behind schedule, against 8.1% nationally. A 45-minute layover does not survive that, and no amount of walking quickly changes it. Ninety minutes is the honest minimum here, and two hours if the onward flight is on a separate ticket.
The 689 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 278 flights under F9 2400 in the data flew IAH to ATL. 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. 278 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 2400
For a booking, F9 2400 is a flight to put a long connection behind. 21.0% of its completed flights arrived an hour or more late, which a short layover will not absorb. If the onward flight is on a separate ticket, the risk sits with you.
Related
Where to go next
- IAH to ATL, every carrier and departure
- ATL to IAH, the return direction
- Delta Air Lines 1315 on the same route88.5%
- Frontier Airlines 1404 on the same route66.9%
- Delta Air Lines 1069 on the same route91.0%
- Delta Air Lines 1682 on the same route76.6%
- Delta Air Lines 1585 on the same route77.8%
- Delta Air Lines 1572 on the same route78.9%
- George Bush Intercontinental (IAH) delay statistics
- Hartsfield-Jackson Atlanta International (ATL) 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.