Flight number record
F9 1403
Frontier Airlines · Atlanta to Houston
- Route
- ATL → IAH
- Departs
- 15:39
- Flights
- 321
- Period
- July 2025 to June 2026
Historical statistics for July 2025 to June 2026, not live status. For today’s F9 1403, check with Frontier Airlines.
F9 1403 sits in the middle of the pack with a C+. About seven flights in ten arrive on time by the DOT's definition, 5 points worse than the national rate of 77.6%. The late ones land a little over an hour behind schedule. That rests on 321 flights, with a median arrival 5 minutes early.
The national on-time rate over the same period is 77.6%, so F9 1403 runs 5 points behind the country as a whole. Across a thousand flights that is about 53 extra late arrivals.
Key figures
On time
72.3%
Arrivals under 15 minutes late, of 318 completed flights
Avg delay
77 min
Across delayed arrivals only, not all flights
Cancelled
0.93%
National rate is 1.81%
1 hour+ late
12.6%
National rate is 8.1%
These figures cover 321 flights between July 2025 and June 2026. Beyond the headline rate, 12.6% 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 1403 flies
F9 1403 flies ATL to IAH without a single fixed slot. Its most common scheduled departure was 15:39, used on 39 of 321 flights. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.
- Departs 15:3939 flights12.1%
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 15:39 departure sits in the 2pm–5pm window. Across every US flight scheduled in that window the on-time rate is 72.4%, and F9 1403 runs level with that at 72.3%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.
Against the route
F9 1403 next to ATL to IAH
Every carrier on ATL to IAH combined arrived on time 76.4% of the time across 4,914 flights, so F9 1403 is 4 points behind it. Frontier flew 767 flights on the same city pair under all its flight numbers, including this one, and those ran 68.9% on time. Across its whole network Frontier Airlines managed 73.2%, close to this flight's figure.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| F9 1403thin sample | 321 | 72.3% | 77 min | 0.93% | C+ |
| All Frontier Airlines on ATL–IAH | 767 | 68.9% | 82 min | 1.43% | C |
| All carriers on ATL–IAH | 4,914 | 76.4% | 67 min | 1.87% | B |
| Frontier Airlines, whole network | 205,332 | 73.2% | 84 min | 1.85% | C |
Across the year
F9 1403 quarter by quarter
F9 1403 did not run the same all year. Its best quarter was Apr–Jun 2026 at 79.3% on time and its weakest Jul–Sep 2025 at 63.8%, a swing of 16 points on roughly 80 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 202581 flights63.8%
- Oct–Dec 202574 flights72.6%
- Jan–Mar 202679 flights73.1%
- Apr–Jun 202687 flights79.3%
Scale runs 55% to 85%. Rows with fewer than 30 flights show a dash.
By weekday, F9 1403 did best on Saturday at 83.8% on time and worst on Monday at 58.3%. Each day rests on about 46 flights, so a gap of 26 points is worth noticing but could still narrow in another year.
Delay causes
Why F9 1403 runs late
One category carries most of the weight here. Late-arriving aircraft accounts for 43% of the 6,805 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.
- 43%Late-arriving aircraft
- 29%Carrier
- 26%National Airspace System
- 1%Extreme weather
43% 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 6,805 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 6,805 delay minutes reported on F9 1403.
Cancellations sit at 0.93% 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. 12.6% 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 321 flights under F9 1403 in the data flew ATL to IAH. 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. 321 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 1403
For a booking, F9 1403 is a flight to put a long connection behind. 12.6% 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
- ATL to IAH, every carrier and departure
- IAH to ATL, the return direction
- Delta Air Lines 1601 on the same route74.8%
- Delta Air Lines 1284 on the same route73.6%
- Delta Air Lines 1682 on the same route82.1%
- Frontier Airlines 4075 on the same route63.4%
- Delta Air Lines 1585 on the same route81.2%
- Hartsfield-Jackson Atlanta International (ATL) delay statistics
- George Bush Intercontinental (IAH) 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.