Carrier route record
NKFLL→SJU
Spirit Airlines · Fort Lauderdale to San Juan
- Flights
- 291
- Period
- July 2025 to June 2026
- Share of route
- 12%
- Carriers
- 4
Historical statistics for July 2025 to June 2026, not live status. For today’s flights, check with Spirit Airlines.
Spirit on FLL to SJU earns a D, which is as low as this site's scale goes for a reason. Only 55.4% of flights arrive inside the 15-minute window, 22 points worse than the national rate of 77.6%. Late arrivals average about an hour. Treat any tight connection here as a coin flip. That rests on 291 flights, with a median arrival 10 minutes late.
The national on-time rate over the same period is 77.6%, so Spirit on FLL to SJU runs 22 points behind the country as a whole. Across a thousand flights that is about 222 extra late arrivals.
Key figures
On time
55.4%
Arrivals under 15 minutes late, of 285 completed flights
Avg delay
68 min
Across delayed arrivals only, not all flights
Cancelled
1.72%
National rate is 1.81%
Whole route
68.0%
Every carrier on FLL to SJU, 2,344 flights
These figures cover 291 flights between July 2025 and June 2026. Beyond the headline rate, 15.4% 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.
Carrier by carrier
Spirit against every carrier on FLL to SJU
Spirit flew 291 of the 2,344 flights on FLL to SJU, about 12% of it. Its 55.4% on time is 13 points worse than the route as a whole, which runs 68.0%. Ranked by on-time rate it is last of four carriers on the route, where the range runs from JetBlue at 71.0% to Spirit at 55.4%. Two of those carriers flew fewer than 365 flights here, so treat their positions as rough.
Only one carrier clears this site's 365-flight floor here, so there is no comparison to draw. The table below is the full picture.
| Airline | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| JetBlue Airways | 1,646 | 71.0% | 58 min | 1.22% | C |
| Southwest Airlinesthin sample | 279 | 64.7% | 48 min | 0.36% | D+ |
| Frontier Airlinesthin sample | 128 | 64.2% | 110 min | 3.91% | D− |
| Spirit Airlines (this page)thin sample | 291 | 55.4% | 68 min | 1.72% | D |
Departure window
When Spirit runs best on this route
Departure time matters more here than the choice of carrier. The gap between the best and worst window is 25 points, against half a point between the best and worst carrier. Each bar is the on-time rate for flights scheduled inside that window.
- 5am–8am—
- 8am–11am89 flights65.1%
- 11am–2pm73 flights39.7%
- 2pm–5pm60 flights51.7%
- 5pm–8pm65 flights62.5%
- 8pm–5am4 flights—
Scale runs 30% to 70%. Rows with fewer than 30 flights show a dash.
The weak window here is the middle of the day, not the evening: 11am–2pm runs 39.7% on time against 65.1% for 8am–11am. That shape usually means a departure bank rather than an accumulating delay, so the recovery later in the afternoon is real rather than noise. The 8am–11am window is the busiest, with 89 flights scheduled in it.
Across the year
Spirit on FLL to SJU through the year
- Jul–Sep 202566 flights71.2%
- Oct–Dec 202569 flights68.1%
- Jan–Mar 2026116 flights35.1%
- Apr–Jun 202640 flights64.1%
Scale runs 25% to 75%. Rows with fewer than 30 flights show a dash.
Monthly volumes are too low here to break the year into twelve reliable readings. What the twelve-month total says is 55.4% on time across 291 flights.
Spirit on FLL to SJU did not run the same all year. Its best quarter was Jul–Sep 2025 at 71.2% on time and its weakest Jan–Mar 2026 at 35.1%, a swing of 36 points on roughly 73 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.
Across the week, Thursday is the strongest day at 65.3% on time and Tuesday the weakest at 51.6%. 14 points is a smaller lever than departure hour, but it is free.
Delay causes
Why Spirit runs late on this route
One category carries most of the weight here. Carrier accounts for 51% of the 8,577 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.
- 51%Carrier
- 26%National Airspace System
- 22%Late-arriving aircraft
- 1%Extreme weather
The largest share of delay minutes, 51%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. Unlike weather, that is a management outcome, and it is the category where the gap between two carriers on the same schedule is genuinely earned. It accounts for 4,406 of the 8,577 delay minutes reported here. The split is drawn from 8,577 reported delay minutes.
Cancellations sit at 1.72% against a national 1.81%, which is ordinary. Diversions add another 0.34%.
Connections and stage length
What a delay here costs
For anyone connecting, the number to weigh is not the on-time rate but the tail behind it. 15.4% 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 1,046 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.
The return leg is a different operation and performs like one: it runs 61.9% on time across 290 flights, 7 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 7 points of difference.
One caution: this is a thin sample. 291 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 Spirit on FLL to SJU
Put together: treat all of this as provisional. 291 flights over twelve months is enough to clear this site's floor and not enough to be confident to better than a couple of points. The 55.4% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 285 completed flights over 12 months sit behind that.
Related
Where to go next
- FLL to SJU, every carrier
- Spirit on SJU to FLL, the return leg
- JetBlue Airways on FLL to SJU71.0%
- Southwest Airlines on FLL to SJU64.7%
- Frontier Airlines on FLL to SJU64.2%
- Spirit Airlines network-wide record
- Fort Lauderdale-Hollywood International (FLL) delay statistics
- Luis Munoz Marin International (SJU) delay statistics
- How often a connection fails at the major US hubs
- The best time of day to fly, according to 7.04 million flight records
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.