JFK to SJU flight delays & on-time performance
Nonstop flights from John F. Kennedy International Airport to Luis Munoz Marin International Airport · 1,598 miles · Aug 2025 – Jul 2026
No FAA-reported ground stops or delays at JFK or SJU right now. Individual flights can still be delayed by the airline; check with your airline for your flight.
Key facts
- Flights from New York (JFK) to San Juan (SJU) arrived on time 70% of the time in Aug 2025 – Jul 2026, worse than the 78% national average.
- 3% were cancelled, and 12% arrived an hour or more late.
- Delta Air Lines was the most punctual airline here (77% on time); Frontier Airlines was the least (56%).
- Departures scheduled around 5am did best (82% on time); around 5pm did worst (55%).
- Tuesday was the most reliable day to fly (76% on time) and Thursday the least (65%).
- The largest source of delay minutes was airline (crew, maintenance, cleaning, fueling) (37%).
Which airline is most on time from JFK to SJU?
Ranked by on-time arrival rate. Regional airlines fly under their partner's brand (e.g. SkyWest for Delta Connection or United Express).
| Airline | On time | Cancelled | Avg delay | 1 hr+ late | Flights |
|---|---|---|---|---|---|
| Delta Air Lines | 77% | 2.3% | 14 min | 7.0% | 1,104 |
| JetBlue | 68% | 3.4% | 26 min | 13.8% | 2,232 |
| Frontier Airlines | 56% | 3.5% | 49 min | 16.7% | 254 |
Best time of day to fly
On-time arrival rate by scheduled departure hour (local time).
- 5am82%204 flights
- 6am71%175 flights
- 7am75%59 flights
- 8am77%514 flights
- 9am71%149 flights
- 10am67%141 flights
- 11am63%216 flights
- 12pm81%439 flights
- 1pm66%225 flights
- 2pm73%122 flights
- 3pm63%80 flights
- 4pm66%64 flights
- 5pm55%175 flights
- 6pm63%242 flights
- 7pm68%321 flights
- 8pm59%173 flights
- 9pm63%153 flights
- 10pm68%120 flights
Best day of the week
On-time arrival rate by day of departure.
- Monday71%5.0% cancelled
- Tuesday76%3.4% cancelled
- Wednesday72%0.2% cancelled
- Thursday65%0.4% cancelled
- Friday74%2.3% cancelled
- Saturday68%5.0% cancelled
- Sunday66%4.8% cancelled
On-time trend by month
Why flights are late
Share of delay minutes by cause, as reported by airlines to the DOT.
- Airline (crew, maintenance, cleaning, fueling)37%
- Late-arriving aircraft36%
- Air traffic control & airport congestion25%
- Extreme weather2%
- Security1%
Why flights are cancelled
Share of cancellations by reason.
- Extreme weather51%
- Air traffic control & airport congestion27%
- Airline (crew, maintenance, cleaning, fueling)17%
- Security5%
JFK to SJU: common questions
- How often are JFK to SJU flights on time?
- 70% of flights arrived less than 15 minutes late in Aug 2025 – Jul 2026, compared with 78% for all US flights.
- How often are flights from New York to San Juan cancelled?
- 3.0% of scheduled flights were cancelled (109 of 3,590).
- How long are typical delays?
- Across all flights the average arrival delay was 24 min (early arrivals count as zero). Flights that were late arrived 76 min behind schedule on average, and 11.9% of flights were an hour or more late.
- How long is taxi time at JFK?
- Flights on this route spent 27 min taxiing from the gate to takeoff on average.
Related routes
Return trip: SJU to JFK — 78% on time
More flights from New York
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. Route: JFK → SJU, nonstop flights by US airlines that report to the DOT. How we calculate this.