How far is Smithtown, NY from Rockville Centre, NY?
The driving distance from Smithtown, NY to Rockville Centre, NY is about 34.1 miles (54.9 km), with a travel time of about 00h 44m by car.
- The straight-line flight distance is about 26.8 miles (43.1 km).
- For a round trip, plan for roughly 01h 29m 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 44m.
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
Mostly Sunny
Driving Route Map
The map below follows the saved road route between Smithtown and Rockville Centre.
Turn-by-Turn Driving Directions
Step-by-step road directions between Smithtown and Rockville Centre.
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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
4 mi · 6 min · Jericho Turnpike
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4
Take the ramp slight right toward SM South: Bay Shore
1110 ft · 27 sec
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5
Merge slight left onto Sunken Meadow State Parkway
1.9 mi · 2 min · Sunken Meadow State Parkway
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6
Continue on Sagtikos State Parkway
5.4 mi · 6 min · Sagtikos State Parkway
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7
Continue on Southern State Parkway
694 ft · 9 sec · Southern State Parkway
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8
Keep slight left to continue on Southern State Parkway
11.8 mi · 15 min · Southern State Parkway
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9
Take the exit slight right toward NY 135 South: Seaford
927 ft · 39 sec
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10
Merge slight left onto Seaford-Oyster Bay Expressway
1.8 mi · 2 min · Seaford-Oyster Bay Expressway
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11
Take the exit slight right toward NY 27 West: New York
1069 ft · 45 sec
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12
Merge slight left onto Sunrise Highway
7.8 mi · 10 min · Sunrise Highway
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13
Turn right onto Morris Avenue
595 ft · 34 sec · Morris Avenue
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14
Turn left onto Maple Avenue
14 m · 2 sec · Maple Avenue
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15
Arrive at your destination
0 m · 1 sec · Maple Avenue
Car Route Details
A richer read on the saved driving route between Smithtown and Rockville Centre.
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.
Southern State Parkway
Keep slight left to continue on Southern State Parkway
11.8 mi · 00h 15m
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 Mostly Sunny near Rockville Centre.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Smithtown to Rockville Centre?
The road trip is about 34.1 miles (54.9 km) and usually takes 00h 44m 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?
West Babylon is a useful midpoint, sitting about 17 miles from Smithtown and 17.1 miles from Rockville Centre.
How much longer is the road route than the straight-line distance?
The direct path is about 26.8 miles (43.1 km), while the road route adds roughly 7.3 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 7:00 PM EDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $5.34 one way or $10.68 round trip. Estimated CO2 is about 10.7 kg one way.
What should you check before leaving?
Before you leave, expect Partly Cloudy around Smithtown and Mostly Sunny near Rockville Centre.
Stop Ideas Near West Babylon
Useful break, food, and waypoint ideas within about 15 miles of the route midpoint.
Town of Babylon History Museum at Old Town Hall
Babylon Town Hall Annex
Transit and Meeting Points
Useful pickup, handoff, or rendezvous points close to West Babylon.
Stamford Transportation Center
New Rochelle station
Yonkers station
Bridgeport
Flight Path Map
This map shows the direct air route between Smithtown and Rockville Centre. Straight-line distance: 26.78 mi (43.1 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 Rockville Centre
Village in Nassau County, New York, United States
| Population | 24,398 |
| Coordinates | 40.6587100, -73.6412400 |
| Altitude | 9 |
| Country | United States |
End: Rockville Centre (-73.64124, 40.65871)
Estimated Travel Time
Distance: 55 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 01h 08m |
| 40 mph (64.37 km/h) | 00h 51m |
| 50 mph (80.47 km/h) | 00h 40m |
| 60 mph (96.56 km/h) | 00h 34m |
| 70 mph (112.65 km/h) | 00h 29m |
| 80 mph (129 km/h) | 00h 25m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $4.45 | $5.34 | $10.68 |
| Mid-grade | $4.98 | $5.98 | $11.96 |
| Premium | $5.38 | $6.46 | $12.92 |
| Diesel | $6.51 | $7.81 | $15.62 |
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