Carrier route record
B6FLL→IAH
JetBlue Airways · Fort Lauderdale to Houston
- Flights
- 162
- 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 FLL to IAH 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 162 flights. The strongest carrier on the route with a full sample, United Airlines, flew 1,894 at 88.3% on time.
The national on-time rate over the same period is 77.3%, so JetBlue on FLL to IAH runs 7 points behind the country as a whole. Across a thousand flights that is about 72 extra late arrivals.
Key figures
On time
70.1%
Arrivals under 15 minutes late, of 154 completed flights
Avg delay
71 min
Across delayed arrivals only, not all flights
Cancelled
4.32%
National rate is 1.89%
Whole route
81.5%
Every carrier on FLL to IAH, 2,919 flights
These figures cover 162 flights between September 2025 and August 2026. Beyond the headline rate, 13.0% 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 FLL to IAH
JetBlue flew 162 of the 2,919 flights on FLL to IAH, about 6% of it. Its 70.1% on time is 11 points worse than the route as a whole, which runs 81.5%. Ranked by on-time rate it is number three of four carriers on the route, where the range runs from United at 88.3% to Frontier at 53.8%. 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 88.3% of the time; Spirit Airlines manages 71.7%. Sample sizes sit next to every figure, because a two-point gap across 698 flights means less than a ten-point one.
| Airline | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| United Airlines | 1,894 | 88.3% | 78 min | 0.63% | A+ |
| Spirit Airlines | 698 | 71.7% | 70 min | 2.15% | C |
| JetBlue Airways (this page)thin sample | 162 | 70.1% | 71 min | 4.32% | C− |
| Frontier Airlinesthin sample | 165 | 53.8% | 83 min | 2.42% | F |
The spread between United and Spirit is 17 points, wide enough that it should decide the booking. On a hundred trips that is 17 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 27 points, against 17 points between the best and worst carrier.
- 5am–8am—
- 8am–11am54 flights84.3%
- 11am–2pm54 flights68.6%
- 2pm–5pm—
- 5pm–8pm—
- 8pm–5am54 flights57.7%
Scale runs 50% to 90%. Rows with fewer than 30 flights show a dash.
The 8pm–5am window is where this operation falls apart: 57.7% on time, against 84.3% for the 8am–11am slot. By evening the aircraft flying these rotations have absorbed a full day of small delays and there is no slack left to recover in. The 8am–11am window is the busiest, with 54 flights scheduled in it.
Across the year
JetBlue on FLL to IAH through the year
- Jul–Sep 2026162 flights70.1%
Scale runs 60% to 75%.
Monthly volumes are too low here to break the year into twelve reliable readings. What the twelve-month total says is 70.1% on time across 162 flights.
Split by quarter, JetBlue on FLL to IAH logged 162 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 70.1% annual figure is the one to use.
Arrival by arrival
How late JetBlue on FLL to IAH runs when it is late
JetBlue on FLL to IAH often beats the schedule: 69 of 154 completed flights, 45%, arrived 15 minutes or more early. The 46 late arrivals split 12 under half an hour, 14 between 30 and 60 minutes, and 20 an hour or more.
- 15+ min early69 flights44.8%
- Within 15 min39 flights25.3%
- 15–29 min late12 flights7.8%
- 30–59 min late14 flights9.1%
- 1–2 hours late13 flights8.4%
- 2+ hours late7 flights4.5%
Scale runs 0% to 100%.
Share of 154 completed flights by arrival against schedule.
A late pushback is often recovered here: of 70 departures that left 15 minutes late or more, 27 still arrived on time. Only 3 left on time and still arrived late.
The worst days
Worst days for JetBlue on FLL to IAH
The latest arrival of the period was on 9 July 2026, 4 hours 23 minutes behind schedule; most of its delay minutes were filed as a late-arriving aircraft. Three of the five worst days fell in August 2026.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 9 July 2026 | 4 hours 23 minutes | Late-arriving aircraft |
| 3 August 2026 | 3 hours 28 minutes | Late-arriving aircraft |
| 21 August 2026 | 3 hours 3 minutes | Late-arriving aircraft |
| 26 August 2026 | 2 hours 48 minutes | Late-arriving aircraft |
| 30 July 2026 | 2 hours 30 minutes | Late-arriving aircraft |
Delay causes
Why JetBlue runs late on this route
Late-arriving aircraft accounts for 58% of the 3,260 delay minutes carriers reported here, and the remaining four split what is left.
- 58%Late-arriving aircraft
- 29%Carrier
- 13%National Airspace System
- 1%Extreme weather
58% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 3,260 reported delay minutes here, that single category outweighs weather by 58 to one. The split is drawn from 3,260 reported delay minutes.
The practical consequence: the 8am–11am departure is the one that starts clean. Its aircraft has no earlier leg to be late from, which is exactly why that window shows 84.3% on time here.
Cancellations run at 4.32%, 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
13.0% 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 43.9% on time across 161 flights, 26 points below 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. 162 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 FLL to IAH
Put together: the delay figures matter less here than the 4.32% cancellation rate. A late arrival costs you a little over an hour; a cancelled flight costs you the day. Book the 8am–11am departure so there is still a schedule behind you if it goes wrong, and treat a same-day connection as optimistic. 154 completed flights over 12 months sit behind that.
Related
Where to go next
- FLL to IAH, every carrier
- JetBlue on IAH to FLL, the return leg
- United Airlines on FLL to IAH88.3%
- Spirit Airlines on FLL to IAH71.7%
- Frontier Airlines on FLL to IAH53.8%
- JetBlue Airways network-wide record
- Fort Lauderdale-Hollywood International (FLL) delay statistics
- George Bush Intercontinental (IAH) 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.