Airport month record
SJUOCT
Luis Munoz Marin International in October 2025
- Departures
- 2,186
- Month
- October 2025
- National, same month
- 79.7%
- Carriers
- 7
Historical statistics for October 2025, not live status or a forecast for this year’s October. For today’s conditions at SJU, see live FAA status.
SJU in October lands a B+, level with the national rate of 79.7%. About one flight in five arrives 15 minutes late or worse, and those flights are late by a little over an hour on average. That is a workable record, not a spotless one. That rests on 2,186 flights, with a median arrival 6 minutes early.
Key figures
On time
79.1%
Arrivals under 15 minutes late, of 2,169 completed departures
Avg delay
68 min
Across delayed arrivals only, not all flights
Cancelled
0.46%
Nationally in October: 0.53%
Whole year
77.8%
SJU across all twelve months
These figures cover 2,186 departures from Luis Munoz Marin International in October 2025. On time means an arrival less than 15 minutes after the scheduled gate time, the DOT's threshold, and the national comparison uses every US departure in the same month rather than the whole year.
Against the year
October next to SJU's other months
Against SJU's own year, October ran about a point better than the twelve-month rate of 77.8%, which makes it number five of twelve months, best first. Cancellations were unusually low for SJU in October, at 0.46% against 1.83% across the year. Either side of it, September ran 80.7% on time and November 81.8%, so a trip moved by a few weeks would have landed in a better stretch.
| Month | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| July 2025 | 3,415 | 75.4% | 80 min | 1.55% | B |
| August 2025 | 2,975 | 70.9% | 80 min | 0.77% | C+ |
| September 2025 | 1,965 | 80.7% | 69 min | 0.00% | B+ |
| October 2025 (this page) | 2,186 | 79.1% | 68 min | 0.46% | B+ |
| November 2025 | 2,715 | 81.8% | 87 min | 1.07% | B |
| December 2025 | 3,393 | 78.4% | 79 min | 1.77% | B |
| January 2026 | 3,306 | 73.3% | 91 min | 7.96% | C− |
| February 2026 | 2,835 | 74.7% | 79 min | 3.17% | C− |
| March 2026 | 3,441 | 75.1% | 73 min | 2.06% | B |
| April 2026 | 3,190 | 78.4% | 68 min | 0.75% | B+ |
| May 2026 | 2,875 | 84.7% | 64 min | 0.21% | B+ |
| June 2026 | 3,095 | 83.1% | 76 min | 0.61% | B+ |
Departure window
The best time of day to leave SJU in October
Departure time matters more here than the choice of carrier. The gap between the best and worst window is 26 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–8am436 flights96.5%
- 8am–11am115 flights92.1%
- 11am–2pm428 flights73.6%
- 2pm–5pm516 flights70.8%
- 5pm–8pm449 flights72.1%
- 8pm–5am242 flights81.6%
Scale runs 60% to 100%. Rows with fewer than 30 flights show a dash.
Book the early departure. Flights leaving between 5am–8am arrive on time 96.5% of the time, against 70.8% for the afternoon window. That is 26 points of difference for no extra money, and it comes from the same aircraft having had no earlier flight to fall behind on. The 2pm–5pm window is the busiest, with 516 flights scheduled in it.
Across the week, Tuesday is the strongest day at 83.1% on time and Thursday the weakest at 76.4%. 7 points is a smaller lever than departure hour, but it is free.
Carrier by carrier
Which airlines ran best at SJU in October
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 | 724 | 75.8% | 65 min | 0.41% | B+ |
| American Airlinesthin sample | 287 | 76.3% | 81 min | 0.00% | B+ |
| Frontier Airlinesthin sample | 268 | 76.6% | 99 min | 0.37% | B+ |
| Southwest Airlinesthin sample | 265 | 83.7% | 43 min | 0.75% | B+ |
| United Airlinesthin sample | 258 | 78.6% | 46 min | 1.55% | B |
| Delta Air Linesthin sample | 250 | 84.7% | 66 min | 0.00% | B+ |
| Spirit Airlinesthin sample | 134 | 88.7% | 82 min | 0.00% | A+ |
Route by route
Busiest routes out of SJU in October
| Route | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| SJU to MCO · Orlando | 446 | 80.2% | 56 min | 0.45% | B+ |
| SJU to JFK · New Yorkthin sample | 269 | 83.0% | 66 min | 0.74% | B+ |
| SJU to MIA · Miamithin sample | 176 | 74.3% | 71 min | 0.00% | C+ |
| SJU to FLL · Fort Lauderdalethin sample | 146 | 87.0% | 117 min | 0.00% | A+ |
| SJU to EWR · Newarkthin sample | 144 | 72.9% | 55 min | 2.78% | C |
| SJU to ATL · Atlantathin sample | 133 | 82.6% | 86 min | 0.00% | B+ |
| SJU to BOS · Bostonthin sample | 98 | 74.2% | 63 min | 1.02% | C |
| SJU to PHL · Philadelphiathin sample | 93 | 76.3% | 49 min | 0.00% | B+ |
| SJU to TPA · Tampathin sample | 88 | 86.4% | 94 min | 0.00% | A+ |
| SJU to ORD · Chicagothin sample | 73 | 68.5% | 40 min | 0.00% | C+ |
| SJU to IAH · Houstonthin sample | 70 | 78.6% | 51 min | 0.00% | B+ |
| SJU to BWI · Baltimorethin sample | 61 | 93.3% | 35 min | 1.64% | A |
| SJU to CLT · Charlottethin sample | 55 | 87.3% | 70 min | 0.00% | A+ |
| SJU to BDL · Hartfordthin sample | 53 | 50.9% | 73 min | 0.00% | F+ |
| SJU to DFW · Dallas-Fort Worththin sample | 49 | 77.1% | 229 min | 0.00% | B+ |
| SJU to IAD · Washingtonthin sample | 43 | 83.7% | 67 min | 0.00% | B+ |
| SJU to HPN · White Plainsthin sample | 31 | 54.8% | 51 min | 0.00% | F+ |
| SJU to DEN · Denverthin sample | 31 | 86.2% | 20 min | 0.00% | A+ |
| SJU to DCA · Washingtonthin sample | 31 | 58.1% | 85 min | 0.00% | D+ |
Delay causes
What held SJU up in October
One category carries most of the weight here. Late-arriving aircraft accounts for 51% of the 31,000 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%Late-arriving aircraft
- 35%Carrier
- 12%National Airspace System
- 2%Extreme weather
- 0%Security
51% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. That is a cascade, and cascades start small and grow through the day. Across 31,000 reported delay minutes here, that single category outweighs weather by 22 to one. It is the strongest argument for booking the first departure of the morning, when the aircraft has been sitting at the gate overnight with nothing to inherit. The split is drawn from 31,034 reported delay minutes.
Cancellations are rare at 0.46%, below the national 0.53% and low enough to earn the plus on the grade. Roughly one flight in 100 is called off; the risk here is arriving late, not not arriving.
5.3% of arrivals land an hour or more late, close to the national 6.3%. That is the figure that decides a connection, and it says a 60 to 75 minute layover is reasonable here while anything under 45 minutes is a bet. Most delays on this route last a little over an hour, which a normal layover absorbs.
What to do with this
Flying from SJU in October
For a October trip through SJU: expect 79.1% on time and 0.46% cancelled, going by October 2025. The 5am–8am window was the strongest part of the day.
Related
Where to go next
- Luis Munoz Marin International (SJU), the whole year
- SJU in July75.4%
- SJU in August70.9%
- SJU in September80.7%
- SJU in November81.8%
- SJU in December78.4%
- SJU in January73.3%
- SJU in February74.7%
- SJU in March75.1%
- SJU in April78.4%
- SJU in May84.7%
- SJU in June83.1%
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.