Route reliability record
SJU→FLL
San Juan to Fort Lauderdale
- Flights
- 2,356
- Period
- September 2025 to August 2026
- Distance
- 1,046 mi
- Carriers
- 4
This route lands a B, about a point worse than the national rate of 77.3%. About one flight in four arrives 15 minutes late or worse, and those flights are late by a little over an hour on average. That rests on 2,356 SJU to FLL flights, with a median arrival 4 minutes early.
Best time to fly SJU to FLL: a 5am–8am departure, ideally on a Wednesday. Flights in that window arrived on time 92.4% of the time and Wednesday flights 81.4%, against 76.2% for the route overall.
The US average over the same twelve months is 77.3%, so there is little to separate this route from the country as a whole. The variation that matters here is internal: which carrier, and what time of day.
Key figures
On time
76.2%
Arrivals under 15 minutes late, of 2,314 completed flights
Avg delay
73 min
Across delayed arrivals only, not all flights
Cancelled
1.44%
National rate is 1.89%
Best carrier
JetBlue
77.9% on time across 1,717 flights
These figures cover 2,356 flights between September 2025 and August 2026. Beyond the headline rate, 9.0% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
Fare search by Aviasales, a Travelpayouts partner. Booking through it may earn this site a commission at no cost to you; it changes no figure here.
Carrier by carrier
Which airline is most reliable on SJU to FLL
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 |
|---|---|---|---|---|---|
| Frontier Airlinesthin sample | 173 | 86.5% | 118 min | 1.16% | A |
| JetBlue Airways | 1,717 | 77.9% | 73 min | 1.34% | B |
| Southwest Airlinesthin sample | 225 | 74.6% | 40 min | 0.44% | C+ |
| Spirit Airlinesthin sample | 241 | 58.2% | 81 min | 3.32% | D− |
Flight by flight
Flights on SJU to FLL
The flight numbers below flew this route at least 250 times in the period, busiest first. Each has its own record, with its schedule and delay causes.
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.
Best ways to make this trip
The most reliable ways to fly San Juan to Fort Lauderdale
Every airline on this route and on the routes between nearby airports, ranked by how often a scheduled flight actually operated and arrived on time. 2 of the top 3 use a different airport at one end.
| Option | Airline | Success | On time | Cancelled | Best departure | Most punctual flight |
|---|---|---|---|---|---|---|
| 1. SJU → MIASan Juan to Miami | Frontier Airlines | 78.6% | 79.9% | 1.57% | 5am–8am, Thu | — |
| 2. SJU → MIASan Juan to Miami | American Airlines | 78.4% | 79.0% | 0.70% | 5am–8am, Wed | — |
| 3. SJU → FLLSan Juan to Fort Lauderdale | JetBlue Airways | 76.9% | 77.9% | 1.34% | 5am–8am, Tue | B6 754 07:00 |
Success is the share of scheduled flights that operated and arrived less than 15 minutes late, so a cancelled flight counts against it. “(route)” means the best time comes from every carrier on the route rather than this airline alone.
Departure window
The best time of day to leave
Departure time matters more here than the choice of carrier. The gap between the best and worst window is 33 points, against half a point between the best and worst carrier.
- 5am–8am564 flights92.4%
- 8am–11am301 flights80.5%
- 11am–2pm599 flights76.9%
- 2pm–5pm411 flights66.7%
- 5pm–8pm302 flights63.3%
- 8pm–5am179 flights59.6%
Scale runs 50% to 100%.
The 8pm–5am window is where this operation falls apart: 59.6% on time, against 92.4% for the 5am–8am 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 11am–2pm window is the busiest, with 599 flights scheduled in it.
Explore
Filter SJU to FLL by airline, time, month and day
Pick a breakdown and a carrier. The dashed mark on each row is the same slice for every US flight.
On SJU to FLL, the best departure window is 5am–8am at 92.4% on time and the worst is 8pm–5am at 59.6%, a wide gap of 32.8 points. All US flights leaving 5am–8am ran 89.3%.
- 5–8am92.4%
- 8–11am80.5%
- 11am–2pm76.9%
- 2–5pm66.7%
- 5–8pm63.3%
- 8pm–5am59.6%
best all US flightsScale 50% to 95%.
Across the year
When delays peak on this route
This route's year swings by 25 points from best month to worst, which is wide. An annual average tells you very little about the week you are actually flying, so read the strip rather than the headline if your dates are fixed.
October is the best month on the calendar at 87.0% on time. Shoulder season thins the schedule and takes the summer weather with it, and the operation gets its margin back. December was the busiest month here, with 262 flights.
Across the week, Wednesday is the strongest day at 81.4% on time and Monday the weakest at 70.9%, a spread of 11 points.
Delay causes
Why this route gets delayed
Late-arriving aircraft accounts for 56% of the 40,000 delay minutes carriers reported here, and the remaining four split what is left.
- 56%Late-arriving aircraft
- 31%Carrier
- 13%National Airspace System
- 0%Extreme weather
- 0%Security
56% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 40,000 reported delay minutes here, that single category outweighs weather by 56 to one. The split is drawn from 40,037 reported delay minutes.
The practical consequence: the 5am–8am departure is the one that starts clean. Its aircraft has no earlier leg to be late from, which is exactly why that window shows 92.4% on time here.
Cancellations sit at 1.44% against a national 1.89%, which is ordinary. Diversions add another 0.34%.
Connections and stage length
What a delay here actually costs
9.0% 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 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.
The return leg is a different operation and performs like one: it runs 66.8% on time across 2,358 flights, 9 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 9 points of difference.
The sample behind these figures is 2,356 flights, enough that the headline rate is stable to within roughly a point. The hour-block and month splits divide that further, so read the thinner bars with more caution than the headline.
Work out the risk of missing a connection in FLL after this flight
What to do with this
Booking this route
Put together: the calendar is the biggest lever here, not the carrier or the hour. October runs 87.0% on time and March 62.4%, a swing of 25 points. If the dates move at all, move them out of March before you think about anything else. 2,314 completed flights over 12 months sit behind that.
Common questions
SJU to FLL questions
How often is SJU to FLL delayed?
About one flight in four arrives at least 15 minutes late, which is the Department of Transportation's definition of a delayed arrival. That works out to 23.8% of the 2,356 flights in this analysis, against 22.7% nationally. Delayed flights are late by a little over an hour on average.
How reliable is SJU to FLL compared with the rest of the country?
76.2% of flights arrive on time here against a national 77.3%, a difference of about a point against it. That is worth a B on this site's grading scale.
What time of day has the fewest delays on SJU to FLL?
The 5am–8am departure window is the strongest at 92.4% on time. The 8pm–5am window is the weakest at 59.6%, 33 points behind. Later departures inherit delays from earlier flights the same aircraft has already flown, which is why the curve slopes the way it does.
How bad are March delays on SJU to FLL?
March is the weakest month at 62.4% on time, compared with 87.0% in October. Across the year that is 25 points between the best and worst months. Moving flexible dates out of that month is one of the few things that reliably helps.
Related
Where to go next
- FLL to SJU — the return legseparate record
- Luis Munoz Marin International (SJU) delay statistics
- Fort Lauderdale-Hollywood International (FLL) delay statistics
- Frontier Airlines on SJU to FLL86.5%
- JetBlue Airways on SJU to FLL77.9%
- Southwest Airlines on SJU to FLL74.6%
- Spirit Airlines on SJU to FLL58.2%
- SJU to MCO, a related route78.0%
- ATL to FLL, a related route70.7%
- SJU to JFK, a related route77.8%
- Frontier Airlines on-time record86.5%
- JetBlue Airways on-time record77.9%
- Southwest Airlines on-time record74.6%
- Why the first flight of the morning is statistically safest
- How often a connection fails at the major US hubs
Direction matters. SJU to FLL and FLL to SJU are scored separately because they are separate operations, with different departure banks and different aircraft. Compare the return leg.
Embed SJU to FLL’s on-time badge on your site
Paste this into a web page. The badge shows the current on-time rate, cancellation rate and grade, and updates every month. Preview it, or build a badge for another route or airport.
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.