Route profile
SJU→EWR
Flight reliability, delays and best times to fly from San Juan to Newark, 1,608 miles.
Right now
Aviation weather is not currently a factor.
Aviation weather is not currently a factor.
Route reliability
July 2023 – July 2026
Better than 10% of comparable major US routes (4,598 compared)
Calculated from 6,836 flights. How this is calculated
SJU → EWR arrives on time 73.2% of the time; the return trip, EWR → SJU, arrives on time 70.0% of the time, a 3.2-point gap between the two directions of the same city pair.
SJU → EWR spends 27.5 minutes on the ground on a 1,608-mile trip: 15.4 minutes from pushback to wheels-up at SJU and 12.1 minutes from touchdown to gate at EWR.
Source: US DOT Bureau of Transportation Statistics · Data covering July 2023 – July 2026
Why SJU → EWR flights are cancelled
July 2023 – July 2026
SJU → EWR cancelled 147 of 6,836 scheduled flights — about 1 in every 47. The reason filed most often was the airline, 43.5% of the cancellations coded on this route — about 1 in every 107 scheduled flights.
Share of cancellations
Of 147 cancelled departures carrying a reason code.
What each reason means
Crew, maintenance, aircraft cleaning, baggage or fueling: what BTS counts as within the carrier’s own control.
64 cancellations, 43.5% of the total.
Conditions the carrier judged severe enough to stop the flight: a blizzard, a hurricane, a line of thunderstorms.
57 cancellations, 38.8% of the total.
Airport capacity, air traffic control flow programs, heavy traffic and ordinary bad weather. A system decision, not the airline’s.
26 cancellations, 17.7% of the total.
A terminal evacuation, a security breach, screening equipment failure, or screening queues over 29 minutes.
0 cancellations, 0.0% of the total.
Reason codes are the operating airline’s own filing with US DOT, not an independent finding of fault. Ordinary bad weather is filed under air traffic, so weather’s full share is larger than its bar.
147 coded cancellations were recorded on SJU → EWR; the section appears from 50.
When it goes wrong
July 2023 – July 2026
63 min late
against a median of 4 min early
SJU → EWR has an average that understates its risk: a typical arrival is 4 min early, but the worst tenth are 67 minutes worse than that. If the trip has something unmissable at the end of it, the median is the wrong number to plan against.
Percentiles over 6,836 operations; cancelled and diverted flights are counted separately.
Will your connection be tight enough?
Layovers at EWR after arriving from SJU.
| Connection time | Chance of missing | Reads as |
|---|---|---|
| 30 min | 43% | Likely to miss |
| 45 min | 26% | High risk |
| 60 min | 18% | High risk |
| 90 min | 11% | Some risk |
| 120 min | 7.1% | Some risk |
This is one leg of a connection. Gate changes and the next flight's own schedule matter too. And a connection can fail before delay is even the question — this route cancels 2.15% of the time and diverts 0.57% of the time, which a late arrival never shows up in.
Chance of missing is the share of 6,650 arrivals on this route that landed later than the connection time less 30 minutes to reach the next gate.
The worst tenth of arrivals on this route land at least 63 minutes late (90th-percentile gate arrival delay), over 6,836 operations.
Any other layover length: connection checker.
Best time to fly
SJU → EWR flights departing 5–9 AM arrived on time 80.8% of the time, against 65.9% for 12–3 PM departures, a gap of 14.9 percentage points.
By departure window
By departure hour
- 12 AM: too few flights to score
- 1 AM: 74.8% on time from 825 flights
- 2 AM: 85.0% on time from 394 flights
- 3 AM to 5 AM: too few flights to score
- 6 AM: 77.4% on time from 390 flights
- 7 AM: 83.0% on time from 279 flights
- 8 AM: 81.6% on time from 163 flights
- 9 AM to 10 AM: too few flights to score
- 11 AM: 74.3% on time from 213 flights
- 12 PM: 75.6% on time from 128 flights
- 1 PM: 65.2% on time from 805 flights
- 2 PM: 64.4% on time from 465 flights
- 3 PM: 66.7% on time from 171 flights
- 4 PM: 72.7% on time from 542 flights
- 5 PM: 62.3% on time from 225 flights
- 6 PM: 78.5% on time from 560 flights
- 7 PM: 73.7% on time from 684 flights
- 8 PM: 69.7% on time from 216 flights
- 9 PM: 66.9% on time from 260 flights
- 10 PM: 68.0% on time from 196 flights
- 11 PM: too few flights to score
Why SJU → EWR runs late
July 2023 – July 2026
the inbound aircraft was late, so this flight started late
crew, maintenance, boarding and fueling, all within the carrier’s control
airspace and airport capacity, including weather-driven flow control
weather severe enough to stop this flight specifically
screening or terminal security incidents
Share of the delay minutes US DOT attributed to each cause for SJU → EWR. Only delays of 15 minutes or more are attributed.
Late-arriving aircraft is the largest cause on SJU → EWR, at 51.3%: flights here mostly leave late because the plane came in late, and the day shows it: 5–9 AM departures arrived on time 80.8% of the time and 12–3 PM departures 65.9%.
Airlines on this route
Carriers with at least 200 flights, by the airline that operated each one.
| Carrier | Flights | On time | Cancelled | Median delay | Severe |
|---|---|---|---|---|---|
| United Airlines | 3,397 | 75.4% | 2.18% | -6 min | 10.2% |
| JetBlue | 1,917 | 70.7% | 1.93% | -2 min | 12.6% |
| Frontier Airlines | 853 | 66.0% | 1.64% | 3 min | 9.8% |
| Spirit Airlines | 669 | 78.4% | 3.29% | -7 min | 8.8% |
United Airlines flew 49.7% of the 6,836 flights listed. Spirit Airlines cancelled 3.29% of its flights here against 1.64% for Frontier Airlines.
Spirit Airlines arrived on time 12.4 percentage points more often than Frontier Airlines on this route.
Other ways to fly San Juan to New York
Airport pairs in the same two city markets, as the DOT defines them.
| Route | Flights | On time | Cancelled | Median delay | Score |
|---|---|---|---|---|---|
| SJU→JFK San Juan to New York | 11,345 | 79.0% | 1.80% | -9 min | 59 |
| SJU→EWR this route San Juan to Newark | 6,836 | 73.2% | 2.15% | -4 min | 46 |
SJU → JFK is the most reliable pairing for this journey at 79.0% on time, against 73.2% for SJU → EWR.
Flights on this route
Flight numbers with at least 600 operations here and still on the schedule.
UA2036 (7:35 PM) arrived on time 81.3% of the time, 14.6 points more often than UA1173 (1:25 PM) at 66.7%.
Weekly and seasonal patterns
By day of week
Wednesday is historically the most reliable day and Saturday the least, a gap of 7.6 percentage points.
By month
- Jan: 72.5%
- Feb: 77.4%
- Mar: 70.5%
- Apr: 76.8%
- May: 76.6%
- Jun: 75.9%
- Jul: 60.6%
- Aug: 63.7%
- Sep: 77.9%
- Oct: 79.4%
- Nov: 81.4%
- Dec: 74.3%
July is historically the weakest month and November the strongest, a spread of 20.8 percentage points.
Reliability over time
July 2023 – July 2026
- July 2023: 53.7% from 217 flights
- August 2023: 60.8% from 217 flights
- September 2023: 76.8% from 159 flights
- October 2023: 85.6% from 155 flights
- November 2023: 85.1% from 149 flights
- December 2023: 78.3% from 189 flights
- January 2024: 74.6% from 200 flights
- February 2024: 79.5% from 175 flights
- March 2024: 72.6% from 160 flights
- April 2024: 74.8% from 159 flights
- May 2024: 77.2% from 186 flights
- June 2024: 71.2% from 185 flights
- July 2024: 63.1% from 213 flights
- August 2024: 61.6% from 204 flights
- September 2024: 82.5% from 170 flights
- October 2024: 79.2% from 176 flights
- November 2024: 80.7% from 198 flights
- December 2024: 69.6% from 225 flights
- January 2025: 69.1% from 219 flights
- February 2025: 81.7% from 192 flights
- March 2025: 65.4% from 212 flights
- April 2025: 74.5% from 206 flights
- May 2025: 70.1% from 207 flights
- June 2025: 74.7% from 180 flights
- July 2025: 61.7% from 199 flights
- August 2025: 69.1% from 193 flights
- September 2025: 74.0% from 151 flights
- October 2025: 72.9% from 144 flights
- November 2025: 78.4% from 144 flights
- December 2025: 75.8% from 197 flights
- January 2026: 74.1% from 217 flights
- February 2026: 70.1% from 180 flights
- March 2026: 74.6% from 188 flights
- April 2026: 81.0% from 191 flights
- May 2026: 85.8% from 135 flights
- June 2026: 82.5% from 161 flights
- July 2026: 64.7% from 183 flights
Over the most recent 12 months (2025-08 to 2026-07), on-time arrivals averaged 74.9% against 72.2% in the 12 months before — improving by 2.7 percentage points.
Data and methodology
Calculated by FlyerIntel from 6,836 SJU → EWR flight records from the US DOT Bureau of Transportation Statistics, covering July 2023 – July 2026. Late means 15 or more minutes past scheduled arrival; cancelled and diverted flights are left out of on-time rates.
Full methodology · Data sources · Report a problem
Related research: How Long a Layover Needs to Be · Two Airlines on One Route · Best Time of Day to Fly From Major US Airports
Analysis last recomputed