Flight profile · Frontier Airlines
F91404
Houston (IAH) to Atlanta (ATL) · scheduled 6:00 AM – 9:23 AM
How F91404 performs
702 operations, January 2024 – July 2026.
F91404 arrived on time 66.6% of the time, against 76.7% for all IAH → ATL flights, so this departure is 10.1 percentage points worse than the route as a whole. Against Frontier Airlines’ own flights on this route it is 7.2 points better.
Source: US DOT Bureau of Transportation Statistics · 702 operations, January 2024 – July 2026 · If F91404 is cancelled or significantly changed, DOT’s automatic refund rule may entitle you to your money back. The refund checker walks through eligibility.
Where F91404 is right now
A live reading, only if you ask for it. It is not part of the reliability record above.
Ask for the position of F91404 right now, if receivers on the ground are hearing it. Nothing is requested until you press the button.
Against the rest of the route
| Flight or route | On time | Cancelled | Median delay | Severe | Flights |
|---|---|---|---|---|---|
| F91404 | 66.6% | 1.99% | 2 min | 9.6% | 702 |
| Frontier Airlines on IAH → ATL | 59.4% | 2.95% | 5 min | 16.6% | 1,727 |
| All IAH → ATL flights | 76.7% | 1.67% | -5 min | 8.7% | 14,350 |
Source: FlyerIntel analysis of US DOT BTS data · January 2024 – July 2026
Why F91404 runs late
Where US DOT attributed the delay minutes on this flight.
crew, maintenance, boarding and fueling, all within the carrier’s control
airspace and airport capacity, including weather-driven flow control
the inbound aircraft was late, so this flight started late
weather severe enough to stop this flight specifically
Share of the delay minutes US DOT attributed to each cause for F91404 on IAH → ATL. Only delays of 15 minutes or more are attributed.
Source: US DOT Bureau of Transportation Statistics · Data covering January 2024 – July 2026
Does a late aircraft delay this flight?
How often the plane that flies F91404 comes in late, and what that does to the departure.
F91404 is usually the aircraft’s first flight of the day: the schedule gives it a median of 6.9 hours on the ground at IAH, so its “inbound” is mostly the aircraft’s arrival the evening before.
When the aircraft came in 15 or more minutes late, F91404 pushed back an average of 28 minutes late; when it came in on time or early, an average of 4 minutes late.
Each departure is matched to the flight the same aircraft flew into IAH just before it, using the tail number in the DOT file, 663 of 688 departures in all. A departure is left out when that flight is unknown, was cancelled or diverted, or the aircraft had sat for more than 12 hours. A flight the airline cancelled never left and is not in the count, and one flown by a substitute aircraft is matched to the aircraft that flew it, not to the one first planned.
Against the network at the same turn length
| Share of departures | Inbound landed 15+ late | Left 15+ late after a late inbound | Left 15+ late after an on-time inbound |
|---|---|---|---|
| F91404 | 32% | 35% | 10% |
| Network, same turn | 29% | 12% | 9% |
A night on the ground absorbs most of a late arrival, so a late inbound matters far less on a turn this long than on a same-day one.
The network row is every flight with a scheduled turn of 6 hours or more, usually overnight. How often F91404’s aircraft landed 15 or more minutes late is about the same as the network’s and, once the aircraft was late, how often F91404 left 15 or more minutes late is higher than the network’s.
More: Which Flight Numbers Pay for a Late Aircraft lists the flight numbers that pass a late aircraft on.
Source: US DOT Bureau of Transportation Statistics · Data covering January 2024 – July 2026
From pushback to gate
When it leaves IAH late, does that still matter by the time it reaches ATL?
F91404 pushes back an average of 12.5 minutes late and arrives a further 3.3 minutes behind that. This departure loses ground between the two gates rather than recovering it, so a late pushback here tends to get worse on the way, not better. It spends 19.0 minutes on the taxiways at IAH, 3.5 minutes longer than a typical IAH departure in the same hour.
On arrival at ATL, F91404 spends 26.7 min taxiing from touchdown to the gate — ground time a connecting passenger sits through before they can even leave the aircraft, on top of however late the flight itself ran. That is 17.1 minutes longer than a typical ATL arrival (9.6 min).
Departure delay is averaged over every pushback and arrival delay over every completed arrival, so the two counts differ by the flights that never reached ATL. Taxi-out is gate to wheels up and sits inside the scheduled block rather than on top of it; the comparison is 14,228 departures from IAH scheduled in the clock hour F91404 most often leaves in. Taxi-in is landing to gate, compared against every arrival FlyerIntel has on file at ATL (1,012,161 flights), not just F91404’s own. More on taxi time.
Source: FlyerIntel analysis of US DOT BTS data · January 2024 – July 2026
The hour it leaves IAH
Part of any flight’s record belongs to the clock rather than to the flight. F91404 has one departure time, so this is what that time is worth.
On-time arrival rate. 14,228 departures from IAH are scheduled in the 6 AM–7 AM hour over the period, against 359,450 across the whole day.
F91404 is scheduled out of IAH at 6:00 AM, in the 6 AM–7 AM bank. Departures from IAH in that hour arrive on time 88.3% of the time against 77.4% across the airport’s whole day — the slot alone is worth 10.8 points better before anything about this particular flight is considered.
The two airport figures cover every departure from IAH to every destination, so they describe the slot rather than this journey — the like-for-like comparison against the route is above. Hours are scheduled local, and a number whose schedule moved between banks inside the period has no single hour and is not described here at all. Why the hour matters.
Source: FlyerIntel analysis of US DOT BTS data · January 2024 – July 2026 · Hours below 120 departures are not scored.
Other routes F91404 has flown
A flight number is a slot in a schedule, and carriers reassign it. These are the other city pairs this number served in the analysis period.
| Route | Operated | Flights | On time |
|---|---|---|---|
| SNA→PHX Santa Ana to Phoenix | August 29, 2023 | 1 | — |
Because the same number has served different journeys, the statistics above describe only the route F91404 currently operates. Blending them would produce an average of two different flights.
When it goes wrong
The average describes a usual day. This is the day that ruins a connection.
57 min late
against a median of 2 min late
Percentiles over 702 operations; cancelled and diverted flights are counted separately.
Source: US DOT Bureau of Transportation Statistics · Data covering January 2024 – July 2026
Other flights on this route
Same airports, same journey, different odds of arriving on time.
| Flight | Airline | On time | Median arrival | Operations |
|---|---|---|---|---|
| DL1069 | Delta Air Lines | 91.9% | 7 min early | 1,065 |
| DL1315 | Delta Air Lines | 88.4% | 9 min early | 1,061 |
| DL1585 | Delta Air Lines | 83.9% | 10 min early | 893 |
| DL1682 | Delta Air Lines | 79.0% | 5 min early | 996 |
| DL1572 | Delta Air Lines | 76.8% | 6 min early | 891 |
| DL1223 | Delta Air Lines | 75.9% | 5 min early | 677 |
| F91404 this flight | Frontier Airlines | 66.6% | 2 min late | 702 |
Every departure listed carries at least 600 operations, so the comparison is between figures that mean something. F91404 is placed in the same ordering rather than left out of it; the rows around it are the most punctual departures on the route, not all of them, so this is a comparison and not a rank. Schedules change; confirm the departure still operates before booking around this.
Data and methodology
Calculated by FlyerIntel from 702 records of F91404 operating IAH → ATL, published by the US DOT Bureau of Transportation Statistics. A flight counts as delayed when it arrives 15 or more minutes after schedule. Cancelled and diverted flights are excluded from the on-time rate and reported separately. Flight numbers are resolved as carrier plus number plus route, because the same number serves different routes over time.
Full methodology · Data sources · Report a problem
Related research: Most and Least Reliable Flight Numbers · The Delay You Inherit · Making Up Time in the Air
Analysis last recomputed