Luis Munoz Marin International Airport (SJU) delays & on-time performance
San Juan, Puerto Rico · 38 nonstop destinations · 7 airlines · Aug 2025 – Jul 2026
No FAA-reported ground stops or delays at SJU right now. Individual flights can still be delayed by the airline; check with your airline for your flight.
On-time arrivals
77%
arrived < 15 min late
Cancelled
2.0%
704 flights
Avg arrival delay
19 min
78 min when late
Departed on time
76%
avg taxi-out 15 min
Figures cover 35,302 departures from SJU; on-time is measured at arrival. Arrivals into SJU were on time 71% of the time.
Key facts
- Flights departing Luis Munoz Marin International Airport (SJU) arrived on time 77% of the time in Aug 2025 – Jul 2026, worse than the 78% national average.
- 2% were cancelled, and 8% arrived an hour or more late.
- Delta Air Lines was the most punctual airline here (88% on time); Spirit Airlines was the least (70%).
- Departures scheduled around 7am did best (91% on time); around 8pm did worst (63%).
- The largest source of delay minutes was late-arriving aircraft (52%).
Most delayed routes from SJU
Lowest on-time arrival rates among regularly flown routes.
- BDL · Hartford70%966 flts
- PHL · Philadelphia71%1,934 flts
- BOS · Boston71%1,961 flts
- DCA · Washington71%364 flts
- FLL · Fort Lauderdale75%2,336 flts
- EWR · Newark75%2,084 flts
- TPA · Tampa76%1,519 flts
- MCO · Orlando78%6,073 flts
- MIA · Miami78%2,643 flts
- JFK · New York78%3,596 flts
Most reliable routes from SJU
Highest on-time arrival rates among regularly flown routes.
- IAH · Houston88%930 flts
- IAD · Washington87%706 flts
- CLT · Charlotte85%1,081 flts
- RDU · Raleigh/Durham82%467 flts
- ATL · Atlanta81%2,095 flts
- BWI · Baltimore79%1,162 flts
- DFW · Dallas/Fort Worth79%987 flts
- ORD · Chicago79%1,394 flts
- JFK · New York78%3,596 flts
- MIA · Miami78%2,643 flts
Best airline at SJU
Departures from this airport, ranked by on-time arrival.
| Airline | On time | Cancelled | Avg delay | Routes | Flights |
|---|---|---|---|---|---|
| Delta Air Lines | 88% | 1.6% | 9 min | 6 | 3,623 |
| United Airlines | 84% | 1.2% | 12 min | 5 | 3,614 |
| American Airlines | 81% | 1.5% | 19 min | 5 | 4,961 |
| Southwest Airlines | 79% | 0.8% | 12 min | 10 | 3,868 |
| JetBlue | 74% | 2.3% | 21 min | 18 | 11,960 |
| Frontier Airlines | 72% | 2.4% | 26 min | 21 | 4,915 |
| Spirit Airlines | 70% | 4.6% | 24 min | 14 | 2,361 |
Best time to fly out of SJU
On-time arrival rate by scheduled departure hour (local time).
- 1am72%580 flts
- 2am81%511 flts
- 3am81%456 flts
- 5am88%1,556 flts
- 6am88%3,153 flts
- 7am91%3,143 flts
- 8am87%1,391 flts
- 9am86%699 flts
- 10am84%1,048 flts
- 11am81%1,556 flts
- 12pm77%1,369 flts
- 1pm75%2,545 flts
- 2pm78%3,031 flts
- 3pm69%3,112 flts
- 4pm69%2,656 flts
- 5pm70%2,341 flts
- 6pm73%2,196 flts
- 7pm67%1,531 flts
- 8pm63%1,059 flts
- 9pm65%701 flts
Monthly trend
Why departures were late
- Late-arriving aircraft52%
- Airline (crew, maintenance, cleaning, fueling)34%
- Air traffic control & airport congestion13%
- Extreme weather1%
- Security0%
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. How we calculate this.