Flight number record
F9 1756
Frontier Airlines · Los Angeles to Houston
- Route
- LAX → IAH
- Departs
- 18:25
- Flights
- 310
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s F9 1756, check with Frontier Airlines.
F9 1756 sits in the middle of the pack with a C. About seven flights in ten arrive on time by the DOT's definition, 7 points worse than the national rate of 77.3%. The late ones land a little over an hour behind schedule. That rests on 310 flights, with a median arrival right on schedule.
The national on-time rate over the same period is 77.3%, so F9 1756 runs 7 points behind the country as a whole. Across a thousand flights that is about 71 extra late arrivals.
Key figures
On time
70.2%
Arrivals under 15 minutes late, of 305 completed flights
Avg delay
73 min
Across delayed arrivals only, not all flights
Cancelled
1.29%
National rate is 1.89%
1 hour+ late
13.8%
National rate is 8.3%
These figures cover 310 flights between September 2025 and August 2026. Beyond the headline rate, 13.8% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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Schedule
When F9 1756 flies
F9 1756 flies LAX to IAH without a single fixed slot. Its most common scheduled departure was 18:25, used on 58 of 310 flights.
- Departs 18:2558 flights18.7%
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 18:25 departure sits in the 5pm–8pm window. Across every US flight scheduled in that window the on-time rate is 68.0%, and F9 1756 runs 2 points better at 70.2%. By that time of day most aircraft have flown several legs already, and whatever went wrong earlier is still in the schedule.
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Against the route
F9 1756 next to LAX to IAH
Every carrier on LAX to IAH combined arrived on time 84.6% of the time across 5,143 flights, so F9 1756 is 14 points behind it. Across its whole network Frontier Airlines managed 72.7%, which this flight trails by 3 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| F9 1756thin sample | 310 | 70.2% | 73 min | 1.29% | C |
| All Frontier Airlines on LAX–IAHthin sample | 336 | 70.6% | 74 min | 1.49% | C |
| All carriers on LAX–IAH | 5,143 | 84.6% | 61 min | 0.47% | B+ |
| Frontier Airlines, whole network | 213,022 | 72.7% | 84 min | 2.05% | C |
Across the year
F9 1756 quarter by quarter
F9 1756 did not run the same all year. Its best quarter was Apr–Jun 2026 at 74.2% on time and its weakest Oct–Dec 2025 at 63.4%, a swing of 11 points on roughly 78 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 202521 flights—
- Oct–Dec 202583 flights63.4%
- Jan–Mar 202653 flights65.4%
- Apr–Jun 202691 flights74.2%
- Jul–Sep 202662 flights73.8%
Scale runs 55% to 80%. Rows with fewer than 30 flights show a dash.
By weekday, F9 1756 did best on Wednesday at 78.1% on time and worst on Monday at 60.4%. Each day rests on about 44 flights, so a gap of 18 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late F9 1756 runs when it is late
The 91 late arrivals split 23 under half an hour, 26 between 30 and 60 minutes, and 42 an hour or more.
- 15+ min early68 flights22.3%
- Within 15 min146 flights47.9%
- 15–29 min late23 flights7.5%
- 30–59 min late26 flights8.5%
- 1–2 hours late27 flights8.9%
- 2+ hours late15 flights4.9%
Scale runs 0% to 100%.
Share of 305 completed flights by arrival against schedule.
18 of 97 late departures made up the time and arrived on time, 19% of them. 12 flights left on time and still arrived late.
The worst days
Worst days for F9 1756
The latest arrival of the period was on 7 December 2025, 4 hours 53 minutes behind schedule; most of its delay minutes were filed as a late-arriving aircraft. The same cause led on three of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 7 December 2025 | 4 hours 53 minutes | Late-arriving aircraft |
| 21 April 2026 | 4 hours 17 minutes | Late-arriving aircraft |
| 22 July 2026 | 3 hours 48 minutes | Carrier |
| 24 December 2025 | 3 hours 29 minutes | Carrier |
| 19 June 2026 | 3 hours 17 minutes | Late-arriving aircraft |
Delay causes
Why F9 1756 runs late
Late-arriving aircraft accounts for 54% of the 6,602 delay minutes carriers reported here, and the remaining four split what is left.
- 54%Late-arriving aircraft
- 30%Carrier
- 16%National Airspace System
- 0%Extreme weather
54% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 6,602 reported delay minutes here, that single category outweighs weather by 54 to one. The split is drawn from 6,602 delay minutes reported on F9 1756.
Cancellations sit at 1.29% against a national 1.89%, which is ordinary. Diversions add another 0.32%.
Connections and routes
What a delay on this flight costs
13.8% of arrivals land a full hour or more behind schedule, against 8.3% nationally. Ninety minutes is the honest minimum for a connection here, and two hours if the onward flight is on a separate ticket.
The 1,379 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 310 flights under F9 1756 in the data flew LAX 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. 310 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 1756
For a booking, F9 1756 is a flight to put a long connection behind. 13.8% 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
- LAX to IAH, every carrier and departure
- IAH to LAX, the return direction
- Delta Air Lines 1143 on the same route85.6%
- United Airlines 2377 on the same route85.9%
- United Airlines 1416 on the same route91.8%
- United Airlines 491 on the same route90.5%
- Delta Air Lines 1287 on the same route83.9%
- United Airlines 2086 on the same route85.8%
- Los Angeles International (LAX) 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, September 2025 to August 2026. Last updated ; recomputed monthly. How this data is collected.