Last recalculated Apr 17, 2026
Drive Time
27m
Distance
18.1 mi
29 km
Drive Score
8/10
Great drive
Same Day?
Yes, doable
Fuel Cost
$3
one way
EV Charging
Unknown
Estimated drive times based on typical traffic patterns. Actual times may vary with weather, construction, and real-time conditions.
Islip, NY
Wikimedia Commons
Greenlawn, NY
Wikimedia Commons
The drive from Islip, NY to Greenlawn, NY covers 18.1 miles and takes about 27m behind the wheel. This route is realistic as a one-day drive if you keep your stops efficient.
The route leans on Sagtikos State Parkway, Heckscher State Parkway, Northern State Parkway for much of the mileage, and the overall profile is highway-focused drive. The longest uninterrupted segment is about 4.9 miles on Sagtikos State Parkway. At current regular gas prices, budget about $2.98 one way before food or hotel costs.
Weekend Trip
Doable as a same-day drive at 27m. Total distance: 18.1 miles.
Family Friendly
Moderate complexity with 0 natural rest stops along the way.
Solo Traveler
27m drive, comfortable solo distance.
EV Driver
0 DC fast chargers along the route. Coverage: unknown.
First-Time Driver
Mostly highway driving (63%). Some complex stretches to watch for.
This is a 27m highway drive covering 18.1 miles, with most of the trip on Sagtikos State Parkway and Heckscher State Parkway. The longest continuous stretch is about 4.9 miles on Sagtikos State Parkway.
This is a straightforward highway drive that stays mostly on Sagtikos State Parkway and Heckscher State Parkway. This route has several spots where lane changes, forks, or exits need your full attention. The trickiest moment comes around 0.2 miles in near NY 111 / Islip Avenue.
Focused - busy navigation packed into a short drive
Balances navigation complexity with total wheel time.
This is a short but busy drive. With 10 decision points packed into just 18.1 miles, you will need to pay attention to lane changes and exits — but the whole thing is over in 27m.
Where does it get tricky?
The main spots that need attention: at 0.2 miles (NY 111 / Islip Avenue): Lane positioning matters here; at 5.7 miles (SA): Exit ramp - move to the correct lane early. Lane positioning matters here; at 11 miles: Exit ramp - move to the correct lane early. Lane positioning matters here.
These are the spots where you need to pay the most attention. Preview them before you drive.
Turn left onto NY 111 / Islip Avenue
Lane positioning matters here
Take the exit onto SA toward SA North: Kings Park
Exit ramp - move to the correct lane early. Lane positioning matters here
Take the exit toward N West: New York
Exit ramp - move to the correct lane early. Lane positioning matters here
Take the exit toward CR 35 North: Huntington
Exit ramp - move to the correct lane early. Lane positioning matters here
Turn left onto Smith Street
Navigation decision point
Based on OSRM destination-sign hints, not a full list of every settlement the road passes.
Between Islip, NY and Greenlawn, NY, road signs point toward So West: New York, Sa North: Kings Park, N West: New York and Cr 35 North: Huntington.
So West: New York
Sa North: Kings Park
N West: New York
Cr 35 North: Huntington
| Road | Distance | Duration |
|---|---|---|
| Sagtikos State Parkway | 4.9 mi | 6m |
| Heckscher State Parkway | 3.6 mi | 4m |
| Northern State Parkway | 2.8 mi | 3m |
| Broadway | 2.1 mi | 3m |
| Islip Avenue | 1.8 mi | 3m |
| Deer Park Road | 1.1 mi | 2m |
| Park Avenue | 0.5 mi | 1m |
| SA | 0.4 mi | <1m |
Step-by-step road directions between Islip, NY and Greenlawn, NY.
Start on NY 27A
Turn left onto NY 111
Take the ramp
Merge onto H
Take the exit onto SA
Merge onto SA
Take the exit
Merge onto N
Take the exit
Continue on Deforest Road North
Turn straight onto CR 35
Continue on CR 35
Turn right onto CR 86
Turn left onto Smith Street
Arrive at destination
Regular Gas
$2.98 one way
$5.96 round trip
| Fuel Type | $/gal | One Way | Round Trip |
|---|---|---|---|
| midgrade | $4.52 | $3.22 | $6.44 |
| premium | $4.92 | $3.51 | $7.02 |
| diesel | $5.61 | $4.00 | $7.99 |
No toll roads detected on this route.
Drive Cost (one way)
Fuel
$3
Estimated CO2 emission: 6.3 kg one way. Prices: EIA weekly data, 2026-04-13.
Driving Electric?
About $2 in charging · 0 stops · 67% less CO2
| Vehicle Type | kWh | Stops | DC Fast | Home Charge |
|---|---|---|---|---|
| Average EV | 5.4 | 0 | $1.90 | $0.87 |
| Efficient EV | 4.5 | 0 | $1.58 | $0.72 |
| EV Truck/SUV | 7.2 | 0 | $2.53 | $1.16 |
Gas CO2
6 kg
EV CO2
2 kg (67% less)
This trip is well within single-charge range for most EVs. No charging stops needed if you start fully charged.
DC fast charging avg $0.35/kWh. Home charging avg $0.16/kWh. US grid CO2: 0.39 kg/kWh.
Current conditions at both ends of the drive.
Origin
Night in Islip on Thursday
Local time
9:50 PM
EDT
Current temp
78°F
Mostly Sunny
Destination
Night in Greenlawn on Thursday
Local time
9:50 PM
EDT
Current temp
56°F
Unavailable
Time zone
Origin and destination are on the same clock, so arrival timing is easier to judge at a glance.
Temperature spread
A meaningful temperature swing is a good cue to rethink layers, water, and how soon you want to arrive.
Road read
The weather snapshot is not static. If you are leaving later, give both cities one more quick forecast check before departure.
Weather data from the National Weather Service. Conditions may change; check closer to your travel date.
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