Route · EWR → SJU · 2020–2025 BTS data
Newark to San Juan
According to PlainFlights' route traffic ranking (BTS On-Time Performance total flights), EWR to SJU (Newark to San Juan) ranks #812 of 4927 tracked domestic routes by total flights (most flights = #1).
Data updated 2026-06-13
- 70.8%
- On-time
- -8.2 pts
- vs US avg
- 79 min
- Delay when late
- 12,959
- Flights
- #812 of 4927
- Corpus placement
Cancelled
1.5%
Best Month
Sep 2024 88%
Worst Month
Nov 2025 61%
Distance
1,608 mi
Carriers
22
Monthly Performance
Recent 24 months of route data.
| Period | Flights | Delayed | Cancelled | Diverted | Carriers |
|---|---|---|---|---|---|
| Dec 2025 | 199 | 69 | 8 | 0 | F9,NK,B6,UA |
| Nov 2025 | 145 | 57 | 5 | 0 | UA,F9,B6 |
| Oct 2025 | 144 | 54 | 2 | 0 | B6,UA,F9 |
| Sep 2025 | 152 | 39 | 0 | 0 | UA,F9,B6 |
| Aug 2025 | 193 | 58 | 2 | 2 | F9,NK,UA,B6 |
| Jul 2025 | 199 | 65 | 11 | 1 | B6,UA,F9,NK |
| Jun 2025 | 180 | 45 | 4 | 0 | B6,UA,F9 |
| May 2025 | 207 | 66 | 3 | 0 | B6,UA,F9 |
| Apr 2025 | 206 | 63 | 2 | 1 | F9,UA,B6 |
| Mar 2025 | 213 | 71 | 1 | 1 | B6,UA,F9 |
| Feb 2025 | 192 | 59 | 1 | 1 | B6,UA,F9 |
| Jan 2025 | 218 | 73 | 0 | 2 | B6,UA,F9 |
| Dec 2024 | 226 | 75 | 1 | 1 | B6,F9,UA |
| Nov 2024 | 197 | 47 | 1 | 1 | UA,B6,F9 |
| Oct 2024 | 177 | 41 | 1 | 0 | UA,F9,B6 |
| Sep 2024 | 170 | 21 | 1 | 0 | UA,B6,F9 |
| Aug 2024 | 204 | 80 | 7 | 0 | B6,F9,UA |
| Jul 2024 | 213 | 83 | 3 | 2 | B6,F9,NK,UA |
| Jun 2024 | 184 | 60 | 9 | 1 | B6,F9,NK,UA |
| May 2024 | 186 | 43 | 0 | 0 | B6,NK,UA |
| Apr 2024 | 158 | 40 | 2 | 0 | B6,NK,UA |
| Mar 2024 | 161 | 46 | 1 | 0 | B6,NK,UA |
| Feb 2024 | 175 | 37 | 2 | 1 | B6,NK,UA |
| Jan 2024 | 201 | 61 | 2 | 0 | B6,NK,UA |
EWR–SJU seasonal on-time pattern
Best: September (79.4%) · weakest: July (61.5%)
Strongest calendar month
September
79.4% on-time · ~161 flights/mo
Busiest calendar month
July
~214 flights/mo avg
Weakest calendar month
July
61.5% on-time · ~214 flights/mo
Cancellation Rate
1.5%
69 of 4,500 flights
Diversion Rate
0.3%
14 of 4,500 flights
Explore origin & destination
On-time and delay data for the airports this route connects.
EWR - Newark
Full on-time, delay-cause, and seasonal performance for Newark, NJ.
EWR on-time profileSJU - San Juan
Full on-time, delay-cause, and seasonal performance for San Juan, PR.
SJU on-time profileCompare the two airports
See EWR and SJU side by side on delays, cancellations, and reliability.
Compare EWR vs SJUOrigin-hub reliability standing
Softer reliability from EWR
Among 74 routes leaving EWR, only 9 (including this one) clear below 75% on-time, while 5 stay ≥85% and 60 sit mid-band. Travelers comparing EWR options should weigh this 70.8% print against those peers · fleet on-time rank #4816 of 4927.
Similar routes
Other BTS-tracked routes with comparable performance or trip length to EWR–SJU.
Routes with a similar on-time rate
What the Data Says About EWR to SJU
On-time performance on the EWR to SJU pairing (Newark to San Juan) trails a chunk of the network: 70.8% of 12,959 tracked flights arrived on schedule, with a 79.2-minute average delay on the ones that ran late. The route spans about 1,608 miles across 22 carriers. Cancellations over the trailing 24 months hit 1.5% (69 of 4,500 flights), with 0.3% diverted.
The monthly split is wide on this route: Sep 2024 posted the strongest performance at 88% on-time, while Nov 2025 came in at just 61% - a 27-point swing worth factoring into travel timing.
On the multi-year calendar, EWR–SJU peaks in September at 79.4% on-time while July carries the heaviest traffic (~214 flights per month) ; the softest month is July at 61.5%, a 17.9-point swing that repeats because the corridor's weather and holiday mix stays stable year to year.
Frequently Asked Questions
Where does EWR to SJU rank among US routes by traffic? ▼
How often are flights delayed from EWR to SJU? ▼
What is the cancellation rate for EWR to SJU? ▼
How far is the flight from EWR to SJU? ▼
When is the best time to fly from EWR to SJU? ▼
Airports on this route
Data source
Data Source: Bureau of Transportation Statistics (BTS), On-Time Performance Data. Statistics reflect cumulative performance across all available reporting periods.
Read our methodology - how this data is sourced, computed, and verified.
Using EWR–SJU data
EWR–SJU sits 8.2 pts below the national 79% average; check the seasonal chart and airport profiles before treating the headline as typical.
- Compare EWR and SJU airport profiles: delay causes and top routes differ even on the same corridor. EWR airport
- If your dates flex, September (79.4% on-time) beats July (61.5%) on this corridor. Seasonal chart
- 4 other routes post a similar 70.8% on-time rate; compare before you commit to this pairing. Similar routes
On-time rate reflects the BTS historical average across all reporting carriers on this origin–destination pair, not any single flight or booking recommendation.
Every figure on PlainFlights is rendered directly from BTS On-Time Performance data, no number is typed in by an editor. This page aggregates this specific route's on-time performance and monthly trend, live from the dataset. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.