How far is Smithtown, NY from Greenlawn, NY?
The driving distance from Smithtown, NY to Greenlawn, NY is about 10 miles (16.1 km), with a travel time of about 00h 18m by car.
- The straight-line flight distance is about 8.6 miles (13.9 km).
- For a round trip, plan for roughly 00h 36m of driving time before adding stops, traffic, or weather delays.
- A comfortable departure window is usually 7:00 AM to 7:00 PM EDT.
Reverse, save, or send this route
This is an easy same-day return drive. Copy the route link, send it to another device, or print a clean version before you head out.
This is an easy same-day return drive.
Flight Distance
Driving Distance
Gas Cost Calculator
Leave and Arrive Planner
Pick a departure time to see your estimated arrival and same-day return window.
Drive time stays fixed at 00h 18m.
This is a short drive, so your comfort window is wide. Traffic and current weather matter more than the clock.
This departure sits inside the recommended comfort window for the route.
Halfway Point
A useful midpoint for breaks, coffee, or meeting in the middle.
Census-designated place in Suffolk County, New York
Route Weather Snapshot
Check the forecast at both ends before you head out.
Partly Cloudy
Sunny
Driving Route Map
The map below follows the saved road route between Smithtown and Greenlawn.
Turn-by-Turn Driving Directions
Step-by-step road directions between Smithtown and Greenlawn.
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1
Start on West Main Street
2964 ft · 52 sec · West Main Street
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2
Keep slight left to continue on West Main Street
55 m · 5 sec · West Main Street
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3
Continue on Jericho Turnpike
763 ft · 15 sec · Jericho Turnpike
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4
Turn right onto Gardiner Road
1875 ft · 37 sec · Gardiner Road
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5
Turn slight right onto Meadow Road
1 mi · 2 min · Meadow Road
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6
Continue on Old Northport Road
3 mi · 5 min · Old Northport Road
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7
Keep slight right to continue on Old Northport Road
54 m · 4 sec · Old Northport Road
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8
Turn straight onto Townline Road
1386 ft · 33 sec · Townline Road
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9
Turn left onto Pulaski Road
4.3 mi · 8 min · Pulaski Road
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10
Turn right onto Broadway
1470 ft · 36 sec · Broadway
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11
Turn left onto Smith Street
6 m · 1 sec · Smith Street
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12
Arrive at your destination
0 m · 1 sec · Smith Street
Car Route Details
A richer read on the saved driving route between Smithtown and Greenlawn.
Turn-heavy local drive
The route has frequent decision points for its length, so lane choice and turn timing will matter more than cruising speed.
Pulaski Road
Turn left onto Pulaski Road
4.34 mi · 00h 08m
Route Summary
A quick read on whether this route feels easy, ambitious, or worth planning around.
A short regional drive
This route is short enough to handle as a quick errand, commute, or easy same-day return without much planning overhead.
Partly Cloudy leaving Smithtown and Sunny near Greenlawn.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Smithtown to Greenlawn?
The road trip is about 10 miles (16.1 km) and usually takes 00h 18m in normal driving conditions.
Is this a same-day trip or an overnight route?
This route is short enough to handle as a quick errand, commute, or easy same-day return without much planning overhead.
What is the halfway point on this route?
Kings Park is a useful midpoint, sitting about 5 miles from Smithtown and 5 miles from Greenlawn.
How much longer is the road route than the straight-line distance?
The direct path is about 8.6 miles (13.9 km), while the road route adds roughly 1.4 extra miles because roads do not follow the straight air line.
When is the best time to leave for this route?
A good departure window is usually 7:00 AM to 7:00 PM EDT. If you want a more comfortable same-day return, try to leave by 7:54 PM EDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $1.56 one way or $3.11 round trip. Estimated CO2 is about 3.1 kg one way.
What should you check before leaving?
Before you leave, expect Partly Cloudy around Smithtown and Sunny near Greenlawn.
Stop Ideas Near Kings Park
Useful break, food, and waypoint ideas within about 15 miles of the route midpoint.
Town of Babylon History Museum at Old Town Hall
Brookhaven Town Hall
Transit and Meeting Points
Useful pickup, handoff, or rendezvous points close to Kings Park.
Stamford Transportation Center
Bridgeport
New Rochelle station
Union Station
Flight Path Map
This map shows the direct air route between Smithtown and Greenlawn. Straight-line distance: 8.64 mi (13.91 km).
#1 Smithtown
Census-designated place in Suffolk County, New York
| Population | 110,876 |
| Coordinates | 40.8559300, -73.2006700 |
| Altitude | 18 |
| Country | United States |
#2 Greenlawn
Census-designated place in Suffolk County, New York
| Population | 13,742 |
| Coordinates | 40.8689900, -73.3651200 |
| Altitude | 69 |
| Country | United States |
End: Greenlawn (-73.36512, 40.86899)
Estimated Travel Time
Distance: 16 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 00h 20m |
| 40 mph (64.37 km/h) | 00h 15m |
| 50 mph (80.47 km/h) | 00h 12m |
| 60 mph (96.56 km/h) | 00h 10m |
| 70 mph (112.65 km/h) | 00h 08m |
| 80 mph (129 km/h) | 00h 07m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $4.45 | $1.56 | $3.11 |
| Mid-grade | $4.98 | $1.74 | $3.49 |
| Premium | $5.38 | $1.88 | $3.77 |
| Diesel | $6.51 | $2.28 | $4.56 |
Assumes 8.3 L/100 km (about 28.3 MPG). CO2 is an estimate and varies by vehicle, fuel blend, traffic, and terrain.
Prices in New York · Oct 15, 2026