Carrier route record
B6SJU→EWR
JetBlue Airways · San Juan to Newark
- Flights
- 626
- Period
- July 2025 to June 2026
- Share of route
- 30%
- Carriers
- 4
Historical statistics for July 2025 to June 2026, not live status. For today’s flights, check with JetBlue Airways.
JetBlue on SJU to EWR sits in the middle of the pack with a B. Close to three flights in four arrive on time by the DOT's definition, 2 points worse than the national rate of 77.6%. The late ones land a little over an hour behind schedule. That rests on 626 flights, with a median arrival 3 minutes early.
The US average over the same twelve months is 77.6%, so there is little to separate JetBlue on SJU to EWR from the country as a whole. The variation that matters here is internal: which carrier, and what time of day.
Key figures
On time
75.4%
Arrivals under 15 minutes late, of 605 completed flights
Avg delay
80 min
Across delayed arrivals only, not all flights
Cancelled
2.88%
National rate is 1.81%
Whole route
74.6%
Every carrier on SJU to EWR, 2,100 flights
These figures cover 626 flights between July 2025 and June 2026. Beyond the headline rate, 9.4% of arrivals land a full hour or more behind schedule. That is the number that wrecks a connection, and it is not visible in an on-time percentage alone.
Carrier by carrier
JetBlue against every carrier on SJU to EWR
JetBlue flew 626 of the 2,100 flights on SJU to EWR, about 30% of it. Its 75.4% on time is about level with the route as a whole at 74.6%. Ranked by on-time rate it is number two of four carriers on the route, where the range runs from United at 76.5% to Spirit at 63.6%. Two of those carriers flew fewer than 365 flights here, so treat their positions as rough.
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 |
|---|---|---|---|---|---|
| United Airlines | 1,113 | 76.5% | 90 min | 2.70% | B |
| JetBlue Airways (this page) | 626 | 75.4% | 80 min | 2.88% | B |
| Frontier Airlinesthin sample | 215 | 69.9% | 67 min | 2.33% | C |
| Spirit Airlinesthin sample | 146 | 63.6% | 79 min | 8.90% | D− |
Departure window
When JetBlue runs best on this route
Departure time matters more here than the choice of carrier. The gap between the best and worst window is 20 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–8am146 flights85.6%
- 8am–11am30 flights—
- 11am–2pm102 flights80.2%
- 2pm–5pm133 flights68.5%
- 5pm–8pm147 flights69.4%
- 8pm–5am68 flights66.1%
Scale runs 60% to 90%. Rows with fewer than 30 flights show a dash.
Book the early departure. Flights leaving between 5am–8am arrive on time 85.6% of the time, against 66.1% for the overnight window. That is 20 points of difference for no extra money, and it comes from the same aircraft having had no earlier flight to fall behind on. The 5pm–8pm window is the busiest, with 147 flights scheduled in it.
Across the year
JetBlue on SJU to EWR through the year
February is the weak month at 59.1% on time, against 84.2% in November. Winter delays cluster: a single storm system can account for most of a month's shortfall, so an average December hides both very good weeks and genuinely unflyable days. June was the busiest month here, with 71 flights.
Across the week, Saturday is the strongest day at 84.3% on time and Sunday the weakest at 68.3%. 16 points is a smaller lever than departure hour, but it is free.
Delay causes
Why JetBlue runs late on this route
One category carries most of the weight here. Carrier accounts for 49% of the 12,000 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.
- 49%Carrier
- 42%Late-arriving aircraft
- 9%National Airspace System
- 0%Security
- 0%Extreme weather
42% 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 12,000 reported delay minutes here, that single category outweighs weather by 42 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 11,866 reported delay minutes.
The largest share of delay minutes, 49%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. Unlike weather, that is a management outcome, and it is the category where the gap between two carriers on the same schedule is genuinely earned. It accounts for 5,761 of the 12,000 delay minutes reported here.
Cancellations run at 2.88%, against 1.81% nationally. That is roughly one flight in 30 cancelled outright. A cancelled flight is invisible in every on-time figure on this page, so the punctuality numbers above describe only the flights that actually operated.
Connections and stage length
What a delay here costs
For anyone connecting, the number to weigh is not the on-time rate but the tail behind it. 9.4% of arrivals land a full hour or more behind schedule, against 8.1% nationally. A 45-minute layover does not survive that, and no amount of walking quickly changes it. Ninety minutes is the honest minimum here, and two hours if the onward flight is on a separate ticket.
At 1,608 miles this is transcontinental flying, and long routes get a quiet structural advantage. Scheduled block time on a flight this length carries more padding in absolute minutes, so a twenty-minute late departure often still becomes an on-time arrival. Read the on-time rate here as slightly flattering next to a short-haul route with the same operational quality.
The return leg runs 76.4% on time across 628 flights, within about a point of this direction. The two legs are scored separately because they usually differ; on this city pair they happen not to.
One caution: this is a thin sample. 626 flights over twelve months is enough to clear this site's floor but not enough to pin the rate down tightly, and a single bad week moves it by more than a point. Treat the grade as a rough reading.
What to do with this
Booking JetBlue on SJU to EWR
Put together: the delay figures matter less here than the 2.88% cancellation rate. A late arrival costs you a little over an hour; a cancelled flight costs you the day. Book the 5am–8am departure so there is still a schedule behind you if it goes wrong, and treat a same-day connection as optimistic. 605 completed flights over 12 months sit behind that.
Related
Where to go next
- SJU to EWR, every carrier
- JetBlue on EWR to SJU, the return leg
- United Airlines on SJU to EWR76.5%
- Frontier Airlines on SJU to EWR69.9%
- Spirit Airlines on SJU to EWR63.6%
- JetBlue Airways network-wide record
- Luis Munoz Marin International (SJU) delay statistics
- Newark Liberty International (EWR) delay statistics
- The US routes with the most cancellations
- Why the first flight of the morning is statistically safest
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.