EWR to SJU flight delays & on-time performance
Nonstop flights from Newark Liberty International Airport to Luis Munoz Marin International Airport · 1,608 miles · Aug 2025 – Jul 2026
No FAA-reported ground stops or delays at EWR or SJU right now. Individual flights can still be delayed by the airline; check with your airline for your flight.
Key facts
- Flights from Newark (EWR) to San Juan (SJU) arrived on time 71% of the time in Aug 2025 – Jul 2026, worse than the 78% national average.
- 3% were cancelled, and 11% arrived an hour or more late.
- JetBlue was the most punctual airline here (75% on time); Frontier Airlines was the least (56%).
- Departures scheduled around 6am did best (88% on time); around 10pm did worst (56%).
- Tuesday was the most reliable day to fly (75% on time) and Monday the least (64%).
- The largest source of delay minutes was airline (crew, maintenance, cleaning, fueling) (41%).
Which airline is most on time from EWR 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 |
|---|---|---|---|---|---|
| JetBlue | 75% | 4.0% | 20 min | 11.4% | 656 |
| United Airlines | 70% | 2.2% | 24 min | 10.5% | 1,113 |
| Spirit Airlines | 69% | 4.5% | 23 min | 12.6% | 133 |
| Frontier Airlines | 56% | 3.3% | 47 min | 16.0% | 183 |
Best time of day to fly
On-time arrival rate by scheduled departure hour (local time).
- 5am81%44 flights
- 6am88%141 flights
- 7am64%200 flights
- 8am76%328 flights
- 9am76%375 flights
- 11am64%221 flights
- 1pm67%32 flights
- 3pm86%23 flights
- 4pm67%33 flights
- 7pm65%425 flights
- 8pm72%35 flights
- 9pm72%51 flights
- 10pm56%132 flights
Best day of the week
On-time arrival rate by day of departure.
- Monday64%4.2% cancelled
- Tuesday75%2.8% cancelled
- Wednesday74%1.0% cancelled
- Thursday70%0.7% cancelled
- Friday72%2.9% cancelled
- Saturday71%4.1% cancelled
- Sunday67%5.1% 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)41%
- Late-arriving aircraft33%
- Air traffic control & airport congestion23%
- Extreme weather3%
- Security0%
Why flights are cancelled
Share of cancellations by reason.
- Extreme weather50%
- Airline (crew, maintenance, cleaning, fueling)27%
- Air traffic control & airport congestion23%
- Security0%
EWR to SJU: common questions
- How often are EWR to SJU flights on time?
- 71% 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 Newark to San Juan cancelled?
- 3.0% of scheduled flights were cancelled (62 of 2,085).
- How long are typical delays?
- Across all flights the average arrival delay was 25 min (early arrivals count as zero). Flights that were late arrived 80 min behind schedule on average, and 11.4% of flights were an hour or more late.
- How long is taxi time at EWR?
- Flights on this route spent 26 min taxiing from the gate to takeoff on average.
Related routes
Return trip: SJU to EWR — 75% on time
More flights from Newark
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. Route: EWR → SJU, nonstop flights by US airlines that report to the DOT. How we calculate this.