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Trip from Port Jefferson, NY to Smithtown, NY

Compiled and reviewed by the US Trip Planner planning team at COD Solutions Oy · Last reviewed Apr 19, 2026 · Editorial standards

Drive Time

18m

Distance

12.2 mi

20 km

Drive Score

6/10

Good drive

Same Day?

Yes, doable

Fuel Cost

$2

one way

EV Charging

Unknown

Best Time to Leave

4 AM
0h 17m ★
6 AM
0h 19m
8 AM
0h 22m
10 AM
0h 20m
12 PM
0h 19m
3 PM
0h 20m
5 PM
0h 22m
8 PM
0h 18m

Estimated drive times based on typical traffic patterns. Actual times may vary with weather, construction, and real-time conditions.

Best Time Drive vs Fly
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Downtown Port Jefferson, NY, NY

Port Jefferson, NY

Richard Harris

town in Suffolk County, New York, United States

Smithtown, NY

Wikimedia Commons

Trip Overview

Connecting Port Jefferson to Smithtown is a quick, 12.2-mile journey across Long Island that typically takes about 18 minutes. Since this trip is so short, it is perfectly suited for a one-day excursion, requiring no overnight stays. You will primarily navigate via Nicolls Road, Middle Country Road, and the Nesconset Highway. With an estimated fuel cost of just $2, this is an incredibly budget-friendly commute or local errand run. Both locations reside within the Northeast region, keeping the overall atmosphere consistent as you travel between these two New York communities.

Main Roads

Road Distance Duration
Nicolls Road 3.1 mi 4m
Middle Country Road 1.9 mi 2m
Nesconset Highway 1.6 mi 2m
East Main Street 1.3 mi 2m
Main Street 1.2 mi 1m
Route 25A 1 mi 1m
West Broadway 0.9 mi 1m
Smithtown Bypass 0.6 mi <1m
Longest stretch: Nicolls Road — 3.1 mi, about 4m

Turn-by-Turn Driving Directions

Step-by-step road directions between Port Jefferson, NY and Smithtown, NY.

1

Start on NY 25A

80 ft · 11 sec · Main Street
2

Turn left onto NY 25A

0.9 mi · 1 min · West Broadway
3

Continue on NY 25A

1.2 mi · 1 min · Main Street
4

Continue on NY 25A

1.0 mi · 1 min · Route 25A
5

Continue on NY 25A

0.4 mi · 33 sec · North Country Road
6

Turn left onto CR 97

3.1 mi · 4 min · Nicolls Road
Use the left lane.
7

Take the exit

407 ft · 11 sec
Toward Route 347, Nesconset Highway WEST, Hauppauge, Smithtown
8

Merge onto NY 347

1.6 mi · 2 min · Nesconset Highway
Use the right lane.
9

Continue on NY 347

0.6 mi · 51 sec · Smithtown Bypass
10

Take the exit

0.1 mi · 10 sec
Toward Route 25, Middle Country Road WEST, Smithtown
11

Turn slight right onto NY 25

1.9 mi · 2 min · Middle Country Road
Use the straight lane.
12

Continue on NY 25

1.3 mi · 2 min · East Main Street
13

Arrive at destination

NY 25; NY 25A

Heads-up: tricky spots

5 of 6

5 decision points cluster between mile 0 and 8.8 — GPS handles the exact turns, but know they're coming. Your lane choice matters more than the turn itself.

4
0 mi into trip | ~0m in | NY 25A / West Broadway

Turn left onto NY 25A / West Broadway

Navigation decision point

4
3.4 mi into trip | ~5m in | CR 97 / Nicolls Road

Turn left onto CR 97 / Nicolls Road

Lane positioning matters here

Use the left lane.
5
6.6 mi into trip | ~10m in

Take the exit toward Route 347, Nesconset Highway WEST, Hauppauge, Smithtown

Exit ramp - move to the correct lane early. Multiple destination signs - pick the right one

Toward Route 347, Nesconset Highway WEST, Haupp...
5
6.6 mi into trip | ~10m in | NY 347 / Nesconset Highway

Merge onto NY 347 / Nesconset Highway

Merge point - match speed before joining. Lane positioning matters here

Use the right lane.
5
8.8 mi into trip | ~13m in

Take the exit toward Route 25, Middle Country Road WEST, Smithtown

Exit ramp - move to the correct lane early. Multiple destination signs - pick the right one

Toward Route 25, Middle Country Road WEST, Smit...

Fuel & Cost

Regular Gas

$2.01 one way

$4.02 round trip

$4.18/gal 25.4 MPG avg 4 kg CO2
Fuel Type $/gal One Way Round Trip
midgrade $4.52 $2.17 $4.34
premium $4.92 $2.36 $4.73
diesel $5.61 $2.69 $5.39

No toll roads detected on this route.

Drive Cost (one way)

Fuel

$2

Estimated CO2 emission: 4.3 kg one way. Prices: EIA weekly data, 2026-04-13.

Driving Electric?

About $1 in charging · 0 stops · 75% less CO2

Vehicle Type kWh Stops DC Fast Home Charge
Average EV 3.7 0 $1.28 $0.59
Efficient EV 3.1 0 $1.07 $0.49
EV Truck/SUV 4.9 0 $1.71 $0.78

Gas CO2

4 kg

EV CO2

1 kg (75% 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.

Travel Intel

Current conditions at both ends of the drive.

Forecast as of Apr 12, 2026

Origin

Port Jefferson, NY

Late night in Port Jefferson on Sunday

Local time

12:42 AM

EDT

Current temp

40°F

Clear

N 5 to 10 mph 0% chance Live forecast

Flood Warning

Flood Warning issued April 11 at 2:05PM EDT by NWS Binghamton NY

Special Weather Statement

Special Weather Statement issued April 11 at 4:31AM EDT by NWS Upton NY

Destination

Smithtown, NY

Late night in Smithtown on Sunday

Local time

12:42 AM

EDT

Current temp

38°F

Clear

N 2 to 10 mph 0% chance Live forecast

Flood Warning

Flood Warning issued April 11 at 2:05PM EDT by NWS Binghamton NY

Special Weather Statement

Special Weather Statement issued April 11 at 4:31AM EDT by NWS Upton NY

Time zone

Same local time

Origin and destination are on the same clock, so arrival timing is easier to judge at a glance.

Temperature spread

2 degrees cooler at arrival

A meaningful temperature swing is a good cue to rethink layers, water, and how soon you want to arrive.

Road read

18m on the road

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.

What kind of drive is this?

Expect a turn-heavy local drive that demands your full attention rather than a monotonous highway cruise. Only about 8% of this route consists of highway-style driving, meaning you will spend most of your time navigating local infrastructure. Your longest uninterrupted stretch occurs on Nicolls Road, which spans 3.1 miles of the total distance. The road's personality is defined by these frequent transitions between surface streets and major connectors. You will find that the rhythm of the drive shifts often as you move through the various turn-heavy segments.

Only 8% highway — the rest is turn-by-turn surface driving.
13 navigation steps total — most of the decisions cluster near the start and finish.
Longest single stretch: 3.1 mi on Nicolls Road.

How Hard Is This Drive?

4/10

Expect a hands-on drive with frequent turns and local roads rather than long highway stretches. There are only a few real navigation decisions along the way. The trickiest moment comes early in the drive near NY 25A / West Broadway.

Driving Effort 4/10

Easy - simple navigation with a manageable amount of wheel time

Balances navigation complexity with total wheel time.

This is a straightforward 18m drive. You will face about 6 decision points, but nothing that requires special attention if you follow navigation.

Where does it get tricky?

The main spots that need attention: near the start (NY 25A / West Broadway): Navigation decision point; at 3.4 miles (CR 97 / Nicolls Road): Lane positioning matters here; at 6.6 miles: Exit ramp - move to the correct lane early. Multiple destination signs - pick the right one.

Elevation Profile

Mostly flat terrain

160 ft 5 ft

Total Climb

314 ft

Total Descent

265 ft

Highest Point

160 ft

~4.6 mi in

Elevation Range

155 ft

Towns Mentioned on Route Signs

Based on OSRM destination-sign hints, not a full list of every settlement the road passes.

Between Port Jefferson, NY and Smithtown, NY, road signs point toward Nesconset Highway West, Hauppauge and Middle Country Road West.

Nesconset Highway West

6.6 mi in | ~10m

Hauppauge

6.6 mi in | ~10m

Middle Country Road West

8.8 mi in | ~13m

About the Cities

Arriving in Smithtown, NY

Full guide →

Smithtown is a town of 117,000 people (2016) in Suffolk County, on Long Island, in New York. Smithtown is comprised of the villages and hamlets of Commack (in part, with the Town of Huntington), Fort Salonga (in part, with the Town of Huntington), Hauppauge (in part, with the Town of Islip), Head of the Harbor, Kings Park, Lake Ronkonkoma (in part with the Town of Brookhaven and Town of Islip), Nesconset, Nissequogue, Smithtown, St. James, & Village of the Branch.

City content from Wikivoyage (CC BY-SA 4.0) and Wikidata (CC0).

Who Is This Route For?

Weekend Trip

Doable as a same-day drive at 18m. Total distance: 12.2 miles.

Family Friendly

Moderate complexity with 0 natural rest stops along the way.

Solo Traveler

18m drive, comfortable solo distance.

EV Driver

0 DC fast chargers along the route. Coverage: unknown.

First-Time Driver

Mostly highway driving (8%). Straightforward navigation.

Scenic Drive

Mostly surface roads route profile with national parks nearby.

Frequently Asked Questions

The longest stretch is about 3.1 miles on Nicolls Road. The full list of main roads is in the Roads section above.

Yes. At under 2 hours behind the wheel, this works well for families — plan one quick stop if you have younger kids.

The main spots that need attention: near the start (NY 25A / West Broadway): Navigation decision point; at 3.4 miles (CR 97 / Nicolls Road): Lane positioning matters here; at 6.6 miles: Exit ramp - move to the correct lane early. Multiple destination signs - pick the right one.

Yes — Fire Island National Seashore. See the National Parks section for detour distances and tips on detours.

Yes. A round trip is manageable in a single day if you plan a break at Smithtown, NY before heading back.

How this page is built

Compiled by the US Trip Planner planning team at COD Solutions Oy from open government datasets — OSRM over OpenStreetMap for geometry, EIA for fuel prices, USGS 3DEP for elevation, and NPS for national parks. See our methodology for refresh cadence and limitations.

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Explore More

Return Trip

Smithtown, NY to Port Jefferson, NY

Plan the drive back the other way.

12.2 mi 17m

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