Airport reliability
San Juan (SJU) on-time performance
How reliably flights leave San Juan, PR (SJU) and reach their destinations, by airline, departure hour and month, September 2025 to August 2026.
San Juan, PR35,332 departures in 12 months
- Departures on time
- 75.7% U.S. average 75.6%
- Cancelled
- 2.1% U.S. average 1.9%
- 60+ minutes late
- 7.7% U.S. average 8.1%
- Scheduled departures
- 35,332 12 months
What this means
SJU departures beat the U.S. average.
- 75.7% of the 35,332 scheduled departures from San Juan (SJU) arrived at their destination on time, about the same as the U.S. average of 75.6%.
- 2.1% of departures were cancelled (U.S. average 1.9%), and 7.7% arrived an hour or more late.
- Flights arriving at SJU were on time 70.0% of the time.
- Among airlines with at least 300 departures, Delta Air Lines was the most punctual from SJU (85.7%) and Spirit Airlines the least (65.5%).
- Over the last 3 years, November was the most reliable month for departures from SJU (81.0% on time) and August the least reliable (69.3%).
- Cancellations peaked in January, when 3.6% of flights were cancelled.
- Flights scheduled to depart 7 am to 8 am were the most punctual (89.5% on time); flights scheduled to depart 8 pm to 9 pm were the least (59.7%).
Airlines at SJU
Ranked by on-time arrival
| Airline | On time | Cancelled | 60+ min late | Avg delay when late | Departures |
|---|---|---|---|---|---|
| Delta Air Lines | 85.7% | 1.6% | 3.4% | 70 min | 3,626 |
| United Airlines | 83.0% | 1.2% | 4.7% | 73 min | 3,596 |
| American Airlines | 79.8% | 1.4% | 6.7% | 95 min | 5,024 |
| Southwest Airlines | 78.1% | 0.8% | 3.8% | 46 min | 3,888 |
| JetBlue Airways | 71.7% | 2.6% | 10.0% | 77 min | 12,134 |
| Frontier Airlines | 71.5% | 2.3% | 9.8% | 90 min | 4,998 |
| Spirit Airlines | 65.5% | 5.2% | 12.0% | 78 min | 2,066 |
Tap a heading to sort.
On-time rate by departure hour
Share of scheduled flights on time SJU average 75.7%
Show as table
| Period | On time | Flights |
|---|---|---|
| Departing before 6 am | 80.4% | 3,457 |
| Departing 6 am to 7 am | 85.3% | 3,198 |
| Departing 7 am to 8 am | 89.5% | 3,270 |
| Departing 8 am to 9 am | 84.6% | 1,303 |
| Departing 9 am to 10 am | 84.8% | 715 |
| Departing 10 am to 11 am | 85.0% | 1,010 |
| Departing 11 am to noon | 79.3% | 1,554 |
| Departing noon to 1 pm | 75.6% | 1,317 |
| Departing 1 pm to 2 pm | 73.5% | 2,461 |
| Departing 2 pm to 3 pm | 76.3% | 3,105 |
| Departing 3 pm to 4 pm | 67.1% | 3,178 |
| Departing 4 pm to 5 pm | 68.3% | 2,541 |
| Departing 5 pm to 6 pm | 68.0% | 2,456 |
| Departing 6 pm to 7 pm | 71.5% | 2,122 |
| Departing 7 pm to 8 pm | 64.9% | 1,556 |
| Departing 8 pm to 9 pm | 59.7% | 1,146 |
| Departing 9 pm to 10 pm | 64.0% | 586 |
| Departing 10 pm to 11 pm | 63.2% | 261 |
| Departing 11 pm to midnight | 68.8% | 96 |
Best and worst months at SJU
Share of scheduled flights on time 12-month average 75.7%
Show as table
| Period | On time | Flights |
|---|---|---|
| January | 70.0% | 9,541 |
| February | 76.0% | 8,333 |
| March | 72.2% | 10,052 |
| April | 79.3% | 9,232 |
| May | 78.9% | 9,046 |
| June | 77.1% | 9,691 |
| July | 70.3% | 10,311 |
| August | 69.3% | 9,006 |
| September | 79.7% | 6,225 |
| October | 79.6% | 6,801 |
| November | 81.0% | 8,115 |
| December | 75.5% | 9,967 |
Month by month, last 12 months
Share of scheduled flights on time U.S. average 75.6%
Show as table
| Period | On time | Flights |
|---|---|---|
| Sep 2025 | 80.5% | 1,965 |
| Oct 2025 | 78.5% | 2,186 |
| Nov 2025 | 80.7% | 2,715 |
| Dec 2025 | 76.8% | 3,393 |
| Jan 2026 | 67.2% | 3,306 |
| Feb 2026 | 72.1% | 2,835 |
| Mar 2026 | 73.1% | 3,441 |
| Apr 2026 | 77.5% | 3,190 |
| May 2026 | 84.1% | 2,875 |
| Jun 2026 | 82.3% | 3,095 |
| Jul 2026 | 68.6% | 3,326 |
| Aug 2026 | 72.0% | 3,005 |
Busiest routes from SJU
| To | On time | Cancelled | Airlines | Flights |
|---|---|---|---|---|
| Orlando (MCO) | 76.8% | 1.2% | 4 | 6,134 |
| New York (JFK) | 74.5% | 3.9% | 3 | 3,560 |
| Miami (MIA) | 78.0% | 0.9% | 3 | 2,650 |
| Fort Lauderdale (FLL) | 74.9% | 1.4% | 4 | 2,356 |
| Atlanta (ATL) | 80.0% | 1.3% | 3 | 2,097 |
| Newark (EWR) | 71.6% | 3.3% | 4 | 2,077 |
| Philadelphia (PHL) | 69.0% | 3.6% | 4 | 1,992 |
| Boston (BOS) | 68.3% | 3.2% | 4 | 1,916 |
| Tampa (TPA) | 75.5% | 1.9% | 4 | 1,562 |
| Chicago (ORD) | 75.3% | 2.4% | 4 | 1,383 |
| Baltimore (BWI) | 76.8% | 2.4% | 3 | 1,153 |
| Charlotte (CLT) | 84.3% | 1.6% | 2 | 1,086 |
| Dallas/Fort Worth (DFW) | 77.3% | 2.9% | 3 | 975 |
| Hartford (BDL) | 68.0% | 2.3% | 2 | 968 |
| Houston (IAH) | 88.1% | 0.6% | 2 | 909 |
| Washington (IAD) | 88.1% | 0.7% | 2 | 698 |
| Raleigh/Durham (RDU) | 80.3% | 1.5% | 3 | 467 |
| Washington (DCA) | 68.1% | 1.9% | 1 | 364 |
| White Plains (HPN) | 66.0% | 5.0% | 1 | 359 |
| Charlotte Amalie (STT) | 70.1% | 0.3% | 1 | 351 |
Sources & data dates
- Source
- U.S. DOT Bureau of Transportation Statistics, Reporting Carrier On-Time Performance (1987-present)
- Period
- September 2025 to August 2026 (12 months); month-of-year patterns September 2023 to August 2026
- Data through
- August 2026
- Processed
- 2026-11-03
- Scope
- Scheduled nonstop domestic departures from San Juan, PR (SJU) by airlines that report to the DOT.
- Method
- Rates use all scheduled flights as the denominator; cancelled and diverted flights count as not on time. Figures based on fewer than 50 scheduled flights are suppressed. Full methodology.