Route profile
SJU→FLL
Flight reliability, delays and best times to fly from San Juan to Fort Lauderdale, 1,046 miles.
Right now
Aviation weather is not currently a factor.
Aviation weather is not currently a factor.
Route reliability
July 2023 – July 2026
Better than 28% of comparable major US routes (4,598 compared)
Calculated from 7,197 flights. How this is calculated
SJU → FLL arrives on time 74.5% of the time; the return trip, FLL → SJU, arrives on time 70.5% of the time, a 4.0-point gap between the two directions of the same city pair.
SJU → FLL spends 21.0 minutes on the ground on a 1,046-mile trip: 14.1 minutes from pushback to wheels-up at SJU and 6.9 minutes from touchdown to gate at FLL.
Source: US DOT Bureau of Transportation Statistics · Data covering July 2023 – July 2026
What sets this route apart
Where SJU to FLL differs most from similar routes by hour, weekday, month and airline, July 2023 – July 2026.
SJU to FLL struggles most at 6 PM: 55.6% of its flights scheduled then arrive on time, 11.4 points behind the 67.0% on routes of similar length at the same hour. Against all other routes the gap is 13 points.
Saturday is the day SJU to FLL slips furthest against routes of similar length, 71.0% on time where they average 77.0%, 6 points lower. Against all other routes the gap is 8.1 points.
In August, SJU to FLL runs 10.5 points below routes of similar length, 63.5% on time to 74.0%. Against all other routes the gap is 13 points.
June is kinder to SJU to FLL than to routes of similar length: 78.5% on time against 71.6%, 6.9 points better. Against all other routes the gap is 5.8 points.
Spirit Airlines’ flights on SJU to FLL arrive on time 66.6% of the time, 7.1 points below the 73.7% it manages on its routes of similar length. Against all other routes the gap is 8.7 points.
SJU to FLL against comparable routes
July 2023 – July 2026| Measure | This route | Compared with | Them | Gap | Flights behind it |
|---|---|---|---|---|---|
| Hour: 6 PM departures | 55.6% | routes of similar length | 67.0% | −11.4 pts | 297 here, 176,347 there |
| Weekday: Saturday | 71.0% | routes of similar length | 77.0% | −6.0 pts | 1,016 here, 379,683 there |
| Month: August | 63.5% | routes of similar length | 74.0% | −10.5 pts | 592 here, 224,935 there |
| Month: June | 78.5% | routes of similar length | 71.6% | +6.9 pts | 623 here, 226,690 there |
| Airline: Spirit Airlines | 66.6% | routes of similar length | 73.7% | −7.1 pts | 1,199 here, 180,062 there |
Each comparison pools the flights of other routes, with this route’s own left out. Similar length means within 15% of this route’s 1,046 miles, with at least 5 such routes. A bucket is set against the most comparable group that has enough flights: similar length, then the same origin (at least 3 routes), then all other routes. Hours, weekdays and months appear only where both sides have 120 completed flights, and airlines where both have 600. The gap must be at least 2 points and 2 standard errors, and only the largest gap each way is kept per measure. These are differences in the flights counted, not causes.
Why SJU → FLL flights are cancelled
July 2023 – July 2026
SJU → FLL cancelled 68 of 7,197 scheduled flights — about 1 in every 106. The reason filed most often was the airline, 38.2% of the cancellations coded on this route — about 1 in every 277 scheduled flights.
Share of cancellations
Of 68 cancelled departures carrying a reason code.
What each reason means
Crew, maintenance, aircraft cleaning, baggage or fueling: what BTS counts as within the carrier’s own control.
26 cancellations, 38.2% of the total.
Airport capacity, air traffic control flow programs, heavy traffic and ordinary bad weather. A system decision, not the airline’s.
25 cancellations, 36.8% of the total.
Conditions the carrier judged severe enough to stop the flight: a blizzard, a hurricane, a line of thunderstorms.
16 cancellations, 23.5% of the total.
A terminal evacuation, a security breach, screening equipment failure, or screening queues over 29 minutes.
1 cancellation, 1.5% of the total.
Reason codes are the operating airline’s own filing with US DOT, not an independent finding of fault. Ordinary bad weather is filed under air traffic, so weather’s full share is larger than its bar.
68 coded cancellations were recorded on SJU → FLL; the section appears from 50.
When it goes wrong
July 2023 – July 2026
59 min late
against a median of 4 min early
SJU → FLL has an average that understates its risk: a typical arrival is 4 min early, but the worst tenth are 63 minutes worse than that. If the trip has something unmissable at the end of it, the median is the wrong number to plan against.
Percentiles over 7,197 operations; cancelled and diverted flights are counted separately.
Will your connection be tight enough?
Layovers at FLL after arriving from SJU.
| Connection time | Chance of missing | Reads as |
|---|---|---|
| 30 min | 41% | Likely to miss |
| 45 min | 25% | High risk |
| 60 min | 17% | High risk |
| 90 min | 9.6% | Some risk |
| 120 min | 6.2% | Some risk |
This is one leg of a connection. Gate changes and the next flight's own schedule matter too. And a connection can fail before delay is even the question — this route cancels 0.94% of the time and diverts 0.26% of the time, which a late arrival never shows up in.
Chance of missing is the share of 7,110 arrivals on this route that landed later than the connection time less 30 minutes to reach the next gate.
The worst tenth of arrivals on this route land at least 59 minutes late (90th-percentile gate arrival delay), over 7,197 operations.
Any other layover length: connection checker.
Best time to fly
SJU → FLL flights departing 5–9 AM arrived on time 89.3% of the time, against 62.8% for 3–6 PM departures, a gap of 26.5 percentage points.
By departure window
By departure hour
- 12 AM to 4 AM: too few flights to score
- 5 AM: 87.4% on time from 366 flights
- 6 AM: 91.7% on time from 804 flights
- 7 AM: 88.7% on time from 297 flights
- 8 AM: 82.7% on time from 152 flights
- 9 AM: 84.8% on time from 386 flights
- 10 AM: 84.5% on time from 181 flights
- 11 AM: 82.6% on time from 287 flights
- 12 PM: 76.6% on time from 399 flights
- 1 PM: 73.9% on time from 570 flights
- 2 PM: 77.9% on time from 433 flights
- 3 PM: 65.7% on time from 275 flights
- 4 PM: 65.0% on time from 474 flights
- 5 PM: 59.6% on time from 590 flights
- 6 PM: 55.6% on time from 302 flights
- 7 PM: 62.3% on time from 431 flights
- 8 PM: 71.2% on time from 657 flights
- 9 PM: 63.7% on time from 348 flights
- 10 PM: 68.4% on time from 160 flights
- 11 PM: too few flights to score
Why SJU → FLL runs late
July 2023 – July 2026
the inbound aircraft was late, so this flight started late
crew, maintenance, boarding and fueling, all within the carrier’s control
airspace and airport capacity, including weather-driven flow control
weather severe enough to stop this flight specifically
screening or terminal security incidents
Share of the delay minutes US DOT attributed to each cause for SJU → FLL. Only delays of 15 minutes or more are attributed.
Late-arriving aircraft is the largest cause on SJU → FLL, at 52.7%: flights here mostly leave late because the plane came in late, and the day shows it: 5–9 AM departures arrived on time 89.3% of the time and 3–6 PM departures 62.8%.
Airlines on this route
Carriers with at least 200 flights, by the airline that operated each one.
| Carrier | Flights | On time | Cancelled | Median delay | Severe |
|---|---|---|---|---|---|
| JetBlue | 4,519 | 75.0% | 0.73% | -6 min | 10.5% |
| Spirit Airlines | 1,222 | 66.6% | 1.72% | -1 min | 12.9% |
| Southwest Airlines | 1,153 | 80.7% | 0.43% | -1 min | 3.8% |
| Frontier Airlines | 303 | 75.9% | 2.97% | -6 min | 11.2% |
JetBlue flew 62.8% of the 7,197 flights listed. Frontier Airlines cancelled 2.97% of its flights here against 0.43% for Southwest Airlines.
Southwest Airlines arrived on time 14.1 percentage points more often than Spirit Airlines on this route.
Flights on this route
Flight numbers with at least 600 operations here and still on the schedule.
B61454 (1:50 PM) arrived on time 75.1% of the time, 17.3 points more often than B62054 (5:12 PM) at 57.8%.
Weekly and seasonal patterns
By day of week
Wednesday is historically the most reliable day and Saturday the least, a gap of 7.4 percentage points.
By month
- Jan: 69.6%
- Feb: 75.1%
- Mar: 70.0%
- Apr: 76.3%
- May: 80.4%
- Jun: 78.5%
- Jul: 71.2%
- Aug: 63.5%
- Sep: 79.2%
- Oct: 83.5%
- Nov: 80.3%
- Dec: 71.7%
August is historically the weakest month and October the strongest, a spread of 20.0 percentage points.
Reliability over time
July 2023 – July 2026
- July 2023: 59.1% from 217 flights
- August 2023: 58.2% from 200 flights
- September 2023: 74.3% from 181 flights
- October 2023: 75.4% from 139 flights
- November 2023: 72.6% from 158 flights
- December 2023: 65.7% from 175 flights
- January 2024: 70.6% from 177 flights
- February 2024: 70.6% from 145 flights
- March 2024: 68.5% from 163 flights
- April 2024: 82.0% from 179 flights
- May 2024: 75.1% from 221 flights
- June 2024: 72.0% from 255 flights
- July 2024: 75.5% from 261 flights
- August 2024: 64.7% from 208 flights
- September 2024: 85.3% from 163 flights
- October 2024: 86.7% from 198 flights
- November 2024: 80.6% from 216 flights
- December 2024: 67.3% from 223 flights
- January 2025: 71.7% from 205 flights
- February 2025: 83.6% from 177 flights
- March 2025: 78.3% from 242 flights
- April 2025: 77.5% from 161 flights
- May 2025: 87.5% from 184 flights
- June 2025: 84.1% from 190 flights
- July 2025: 76.5% from 223 flights
- August 2025: 67.7% from 195 flights
- September 2025: 78.2% from 121 flights
- October 2025: 87.0% from 146 flights
- November 2025: 85.3% from 228 flights
- December 2025: 79.5% from 262 flights
- January 2026: 66.7% from 217 flights
- February 2026: 70.0% from 171 flights
- March 2026: 62.4% from 233 flights
- April 2026: 69.5% from 180 flights
- May 2026: 79.7% from 174 flights
- June 2026: 81.2% from 192 flights
- July 2026: 72.9% from 217 flights
Over the most recent 12 months (2025-08 to 2026-07), on-time arrivals averaged 74.7% against 78.2% in the 12 months before — declining by 3.5 percentage points.
Data and methodology
Calculated by FlyerIntel from 7,197 SJU → FLL flight records from the US DOT Bureau of Transportation Statistics, covering July 2023 – July 2026. Late means 15 or more minutes past scheduled arrival; cancelled and diverted flights are left out of on-time rates.
Full methodology · Data sources · Report a problem
Related research: How Long a Layover Needs to Be · Two Airlines on One Route · Best Time of Day to Fly From Major US Airports
Analysis last recomputed