Carrier route record
B6IAH→FLL
JetBlue Airways · Houston to Fort Lauderdale
- Flights
- 161
- Period
- September 2025 to August 2026
- Share of route
- 6%
- Carriers
- 4
Historical statistics for September 2025 to August 2026, not live status. For today’s flights, check with JetBlue Airways.
JetBlue on IAH to FLL earns an F−, which is as low as this site's scale goes for a reason. Only 43.9% of flights arrive inside the 15-minute window, 33 points worse than the national rate of 77.3%. Late arrivals average a little over an hour. Treat any tight connection here as a coin flip. That rests on 161 flights. The strongest carrier on the route with a full sample, United Airlines, flew 1,893 at 85.6% on time.
The national on-time rate over the same period is 77.3%, so JetBlue on IAH to FLL runs 33 points behind the country as a whole. Across a thousand flights that is about 334 extra late arrivals.
Key figures
On time
43.9%
Arrivals under 15 minutes late, of 155 completed flights
Avg delay
77 min
Across delayed arrivals only, not all flights
Cancelled
3.73%
National rate is 1.89%
Whole route
78.5%
Every carrier on IAH to FLL, 2,923 flights
These figures cover 161 flights between September 2025 and August 2026. Beyond the headline rate, 24.5% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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Carrier by carrier
JetBlue against every carrier on IAH to FLL
JetBlue flew 161 of the 2,923 flights on IAH to FLL, about 6% of it. Its 43.9% on time is 35 points worse than the route as a whole, which runs 78.5%. Ranked by on-time rate it is last of four carriers on the route, where the range runs from United at 85.6% to JetBlue at 43.9%. One of those carriers flew fewer than 365 flights here, so treat their positions as rough.
The choice of carrier is not cosmetic here. United Airlines arrives on time 85.6% of the time; Spirit Airlines manages 70.9%. Sample sizes sit next to every figure, because a two-point gap across 704 flights means less than a ten-point one.
| Airline | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| United Airlines | 1,893 | 85.6% | 59 min | 0.58% | A+ |
| Spirit Airlines | 704 | 70.9% | 77 min | 1.99% | C |
| Frontier Airlinesthin sample | 165 | 61.6% | 52 min | 3.64% | D− |
| JetBlue Airways (this page)thin sample | 161 | 43.9% | 77 min | 3.73% | F− |
The spread between United and Spirit is 15 points, wide enough that it should decide the booking. On a hundred trips that is 15 more arrivals inside the on-time window.
Timetable by Aviasales, a Travelpayouts partner. Booking through it may earn this site a commission at no cost to you; it changes no figure here.
Departure window
When JetBlue runs best on this route
Departure time matters more here than the choice of carrier. The gap between the best and worst window is 19 points, against 15 points between the best and worst carrier.
- 5am–8am53 flights34.0%
- 8am–11am—
- 11am–2pm54 flights52.8%
- 2pm–5pm54 flights44.2%
- 5pm–8pm—
- 8pm–5am—
Scale runs 25% to 60%. Rows with fewer than 30 flights show a dash.
The best window here is not the first bank but the 11am–2pm slot at 52.8% on time, ahead of 5am–8am at 34.0%. Where the curve peaks mid-day rather than at dawn, the constraint is usually congestion at one end rather than the aircraft's own rotation. The 11am–2pm window is the busiest, with 54 flights scheduled in it.
Across the year
JetBlue on IAH to FLL through the year
- Jul–Sep 2026161 flights43.9%
Scale runs 35% to 50%.
Monthly volumes are too low here to break the year into twelve reliable readings. What the twelve-month total says is 43.9% on time across 161 flights.
Split by quarter, JetBlue on IAH to FLL logged 161 flights in Jul–Sep 2026. Fewer than three of those quarters carried the 30 completed flights this site needs before printing a rate, so the 43.9% annual figure is the one to use.
Arrival by arrival
How late JetBlue on IAH to FLL runs when it is late
The 87 late arrivals split 26 under half an hour, 23 between 30 and 60 minutes, and 38 an hour or more.
- 15+ min early1 flights0.6%
- Within 15 min67 flights43.2%
- 15–29 min late26 flights16.8%
- 30–59 min late23 flights14.8%
- 1–2 hours late26 flights16.8%
- 2+ hours late12 flights7.7%
Scale runs 0% to 100%.
Share of 155 completed flights by arrival against schedule.
Time lost at the gate mostly stays lost. Of 57 departures that left 15 minutes late or more, only 0 made it up before arrival. In the other direction, 30 flights left on time yet arrived 15 minutes late or more, so that delay built up after pushback: in the air, in a holding pattern or on the ground at FLL.
The worst days
Worst days for JetBlue on IAH to FLL
The latest arrival of the period was on 13 July 2026, 8 hours 7 minutes behind schedule; most of its delay minutes were filed as a late-arriving aircraft. Three of the five worst days fell in July 2026.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 13 July 2026 | 8 hours 7 minutes | Late-arriving aircraft |
| 9 July 2026 | 6 hours 28 minutes | Late-arriving aircraft |
| 9 August 2026 | 6 hours 3 minutes | Carrier |
| 28 July 2026 | 4 hours 2 minutes | Late-arriving aircraft |
| 26 August 2026 | 3 hours 59 minutes | Late-arriving aircraft |
Delay causes
Why JetBlue runs late on this route
Carriers report a reason for every delay minute they cause, in five DOT categories. The split below is by minutes, not by number of flights, so a handful of very long weather delays weighs as much as many short ones. It covers 6,689 reported delay minutes.
- 37%Carrier
- 36%Late-arriving aircraft
- 27%National Airspace System
36% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 6,689 reported delay minutes here, that single category outweighs weather by 36 to one. The split is drawn from 6,689 reported delay minutes.
The largest share of delay minutes, 37%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 2,460 of the 6,689 delay minutes reported here.
Cancellations run at 3.73%, against 1.89% nationally. That is about one flight in 25 cancelled outright. A cancelled flight is invisible in every on-time figure on this page, so the punctuality numbers above describe only the flights that actually operated.
Connections and stage length
What a delay here costs
24.5% 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 966 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.
The return leg is a different operation and performs like one: it runs 70.1% on time across 162 flights, 26 points above this direction. Departure banks, aircraft rotations and the congestion at each end all differ, so scoring the two directions together would average away a real 26 points of difference.
One caution: this is a thin sample. 161 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 JetBlue on IAH to FLL
Put together: the delay figures matter less here than the 3.73% cancellation rate. A late arrival costs you a little over an hour; a cancelled flight costs you the day. Book the 11am–2pm departure so there is still a schedule behind you if it goes wrong, and treat a same-day connection as optimistic. 155 completed flights over 12 months sit behind that.
Related
Where to go next
- IAH to FLL, every carrier
- JetBlue on FLL to IAH, the return leg
- United Airlines on IAH to FLL85.6%
- Spirit Airlines on IAH to FLL70.9%
- Frontier Airlines on IAH to FLL61.6%
- JetBlue Airways network-wide record
- George Bush Intercontinental (IAH) delay statistics
- Fort Lauderdale-Hollywood International (FLL) delay statistics
- The US routes with the most cancellations
- Same route, different airline: where the carrier you pick matters most
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.