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Trip from Smithtown, NY to Port Jefferson, NY

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

Drive Time

17m

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 16m ★
6 AM
0h 18m
8 AM
0h 21m
10 AM
0h 19m
12 PM
0h 19m
3 PM
0h 19m
5 PM
0h 21m
8 PM
0h 17m

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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town in Suffolk County, New York, United States

Smithtown, NY

Wikimedia Commons

Downtown Port Jefferson, NY, NY

Port Jefferson, NY

Richard Harris

Trip Overview

If you are planning a quick excursion on Long Island, the 12.2-mile journey from Smithtown to Port Jefferson is a straightforward commute. You can easily complete this trip in about 17 minutes, making it an ideal candidate for a one-day outing. Budgeting around $2 for fuel should cover your needs for this short distance. Because you are staying within the Northeast region, you won't experience major climate or landscape shifts. This is a practical, no-fuss drive that doesn't require an overnight stay, allowing you the flexibility to head out whenever your schedule permits.

Main Roads

Road Distance Duration
Nicolls Road 3.2 mi 4m
Nesconset Highway 2.3 mi 2m
Middle Country Road 2 mi 3m
West Main Street 1.3 mi 2m
Main Street 1.2 mi 1m
Route 25A 1 mi 1m
West Broadway 0.9 mi 1m
North Country Road 0.3 mi <1m
Longest stretch: Nicolls Road — 3.2 mi, about 4m

Turn-by-Turn Driving Directions

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

1

Start on NY 25; NY 25A

1.3 mi · 2 min · West Main Street
2

Continue on NY 25

2.0 mi · 3 min · Middle Country Road
3

Turn left onto NY 347

2.3 mi · 2 min · Nesconset Highway
4

Turn left onto CR 97

3.2 mi · 4 min · Nicolls Road
Use the left lane.
5

Take the exit

221 ft · 7 sec
6

Turn straight onto NY 25A

0.3 mi · 30 sec · North Country Road
7

Continue on NY 25A

1.0 mi · 1 min · Route 25A
8

Continue on NY 25A

1.2 mi · 1 min · Main Street
9

Continue on NY 25A

0.9 mi · 1 min · West Broadway
10

Turn right onto NY 25A

80 ft · 2 sec · Main Street
11

Arrive at destination

NY 25A

Heads-up: tricky spots

3 of 3

3 decision points cluster between mile 5.6 and 12.2 — GPS handles the exact turns, but know they're coming. Your lane choice matters more than the turn itself.

4
5.6 mi into trip | ~7m in | CR 97 / Nicolls Road

Turn left onto CR 97 / Nicolls Road

Lane positioning matters here

Use the left lane.
3
8.8 mi into trip | ~12m in

Take the exit

Exit ramp - move to the correct lane early

4
12.2 mi into trip | ~17m in | NY 25A / Main Street

Turn right onto NY 25A / Main Street

Navigation decision point

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

Smithtown, NY

Morning in Smithtown on Sunday

Local time

7:41 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

Destination

Port Jefferson, NY

Morning in Port Jefferson on Sunday

Local time

7:41 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

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 warmer at arrival

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

Road read

17m 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 driving experience as you navigate between these two communities. While roughly 8 miles of the trip are classified as highway, the route relies heavily on Nicolls Road, Nesconset Highway, and Middle Country Road. You will find your longest uninterrupted stretch is just 3.2 miles while traveling along Nicolls Road. Since the majority of the route consists of local roads, stay alert for frequent turns and intersections. It lacks the monotony of a long interstate haul, offering instead a more interactive drive that keeps you engaged with the local road infrastructure.

Only 8% highway — the rest is turn-by-turn surface driving.
11 navigation steps total — most of the decisions cluster near the start and finish.
Longest single stretch: 3.2 mi on Nicolls Road.

How Hard Is This Drive?

2/10

Expect a hands-on drive with frequent turns and local roads rather than long highway stretches. Navigation is very simple - set it and forget it for most of the drive. The trickiest moment comes around 5.6 miles in near CR 97 / Nicolls Road.

Driving Effort 2/10

Very easy - short and simple to drive

Balances navigation complexity with total wheel time.

The drive from Smithtown, NY to Port Jefferson, NY is easy. At 17m with 8% highway, most drivers will find it relaxed and low-stress.

Where does it get tricky?

The main spots that need attention: at 5.6 miles (CR 97 / Nicolls Road): Lane positioning matters here; at 8.8 miles: Exit ramp - move to the correct lane early; at 12.2 miles (NY 25A / Main Street): Navigation decision point.

Elevation Profile

Mostly flat terrain

204 ft 5 ft

Total Climb

242 ft

Total Descent

291 ft

Highest Point

204 ft

~7.1 mi in

Elevation Range

199 ft

About the Cities

Starting 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 17m. Total distance: 12.2 miles.

Family Friendly

Moderate complexity with 0 natural rest stops along the way.

Solo Traveler

17m 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 3.2 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: at 5.6 miles (CR 97 / Nicolls Road): Lane positioning matters here; at 8.8 miles: Exit ramp - move to the correct lane early; at 12.2 miles (NY 25A / Main Street): Navigation decision point.

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 Port Jefferson, 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

Port Jefferson, NY to Smithtown, NY

Plan the drive back the other way.

12.2 mi 18m

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