The drive from Smithtown, NY to Sullivan, NY covers 309.7 miles and takes about 6h 18m behind the wheel.
This route is realistic as a one-day drive if you keep your stops efficient.
The route leans on NY 17, New York State Thruway, Long Island Expressway for much of the mileage,
and the overall profile is highway-focused drive.
The longest uninterrupted segment is about 117.5 miles on NY 17.
At current regular gas prices, budget about $50.98 one way before food or hotel costs.
Trip Pace
Same-day drive is realistic
A same-day return is possible, but it will make for a full day on the road.
Break Rhythm
1 planned break
Plan on a short reset every 3 to 4 hours to stay fresh behind the wheel.
Midpoint
154.9 miles from Smithtown, NY
A natural place for your longest stop of the day
, about 3h 15m into the drive
.
Who Is This Route For?
Weekend Trip
Doable as a same-day drive at 6h 18m. Total distance: 309.7 miles.
Family Friendly
Moderate complexity with 1 natural rest stops along the way.
Solo Traveler
6h 18m drive, plan rest stops for pacing.
Drive Character
This is a 6h 18m highway drive covering 309.7 miles, with most of the trip on NY 17 and New York State Thruway. The longest continuous stretch is about 117.5 miles on NY 17.
Most of the miles stay on highways, which makes pacing and fuel planning easier than turn-by-turn city driving.
There are about 43 navigation steps in the underlying route data, so the final approach matters more than the middle miles.
NY 17 is the longest continuous segment at about 117.5 miles.
How Hard Is This Drive?
This is a straightforward highway drive that stays mostly on NY 17 and New York State Thruway. This route has several spots where lane changes, forks, or exits need your full attention. The trickiest moment comes around 7.6 miles in.
Driving Effort10/10
High effort - long or complex enough to need steady focus all day
Balances navigation complexity with total wheel time.
This is a demanding drive. With 28 significant decision points across 309.7 miles, you will need to stay alert - especially through interchange areas and urban stretches. Consider splitting it into segments if you are not comfortable with fast highway navigation.
Where does it get tricky?
The main spots that need attention: at 7.6 miles: Highway fork - watch signs carefully. Lane positioning matters here; at 33.3 miles: Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one; at 33.5 miles: Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one.
Critical Maneuvers
5 of 28 key points
These are the spots where you need to pay the most attention. Preview them before you drive.
8
7.6 mi into trip|~10m in
Keep slight left at fork toward I 495 West: New York
Highway fork - watch signs carefully. Lane positioning matters here
Use the straight / slight right lanes.
Toward I 495 West: New York
8
33.3 mi into trip|~46m in
Take the exit toward Cross Island Parkway, Whitestone Bridge, Kennedy Airport
Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one
Use the straight / slight right lanes.
Exit 31N-S
Toward Cross Island Parkway, Whitestone Bridge,...
10
33.5 mi into trip|~46m in
Keep slight right at fork toward Cross Island Parkway North, Whitestone Bridge
Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one
Use the slight left / slight right lanes.
Exit 31N
Toward Cross Island Parkway North, Whitestone B...
8
36.9 mi into trip|~51m in
Take the exit toward I 295 North: Throgs Neck Bridge, Bronx, New England
Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one
Use the straight / slight right lanes.
Exit 33
Toward I 295 North: Throgs Neck Bridge, Bronx,...
9
49.3 mi into trip|~1h 10m in
Keep slight right at fork toward NJ 4 West: Paramus
Highway fork - watch signs carefully. Lane positioning matters here
Use the slight left / slight right lanes.
Exit 72A
Toward NJ 4 West: Paramus
Towns Mentioned on Route Signs
Based on OSRM destination-sign hints, not a full list of every settlement the road passes.
Between Smithtown, NY and Sullivan, NY, road signs point toward Kennedy Airport, Cross Island Parkway North, Bronx, New England, Upper Level and Njtp South: Hackensack - among others.
Kennedy Airport
33.3 mi in|~46m
Cross Island Parkway North
33.5 mi in|~46m
Bronx
36.9 mi in|~51m
New England
36.9 mi in|~51m
Upper Level
46.6 mi in|~1h 5m|via I 95; US 1
Njtp South: Hackensack
49.1 mi in|~1h 9m
Gsp South
56.2 mi in|~1h 19m
Gsp North
56.2 mi in|~1h 19m
Newark
56.2 mi in|~1h 19m
Mahwah
56.2 mi in|~1h 19m
New York State Thruway North: Albany
71.4 mi in|~1h 39m|via NY 17
Main Roads
Road
Distance
Duration
NY 17
117.5 mi
2h 15m
New York State Thruway
113.7 mi
2h 11m
Long Island Expressway
24.8 mi
33m
NJ 17
14.7 mi
18m
NJ 4
6.7 mi
9m
Cross Bronx Expressway
6.6 mi
8m
Jericho Turnpike
4 mi
6m
Cross Island Parkway
3.1 mi
4m
Longest stretch:
NY 17
— 117.5 mi, about 2h 15m
Turn-by-Turn Driving Directions
Step-by-step road directions between Smithtown, NY and Sullivan, NY.
1
Start on NY 25; NY 25A
0.6 mi·51 sec·West Main Street
2
Keep slight left at fork onto NY 25; NY 25A
179 ft·5 sec·West Main Street
3
Continue on NY 25
4.0 mi·6 min·Jericho Turnpike
4
Take the ramp
0.2 mi·27 sec
Toward SM South: Bay Shore
5
Merge onto SM
1.9 mi·2 min·Sunken Meadow State Parkway
6
Continue on SA
0.8 mi·49 sec·Sagtikos State Parkway
7
Take the exit
0.1 mi·16 sec
Exit S1WToward I 495 West: New YorkUse the slight right lane.
8
Keep slight left at fork
0.2 mi·23 sec
Toward I 495 West: New YorkUse the straight / slight right lanes.
9
Turn straight onto LIE North Service Road
0.4 mi·33 sec·LIE North Service Road
10
Turn straight onto North Service Road
0.1 mi·14 sec·North Service Road
11
Take the ramp
0.2 mi·21 sec
Toward I 495 West: New York
12
Merge onto I 495
25 mi·33 min·Long Island Expressway
Use the straight / slight right lanes.
13
Take the exit
0.2 mi·27 sec
Exit 31N-SToward Cross Island Parkway, Whitestone Bridge, Kennedy AirportUse the straight / slight right lanes.
14
Keep slight right at fork
0.3 mi·38 sec
Exit 31NToward Cross Island Parkway North, Whitestone BridgeUse the slight left / slight right lanes.
15
Merge onto CI
3.1 mi·4 min·Cross Island Parkway
Use the straight / slight right lanes.
16
Take the exit
0.6 mi·1 min
Exit 33Toward I 295 North: Throgs Neck Bridge, Bronx, New EnglandUse the straight / slight right lanes.
17
Merge onto I 295
1.8 mi·3 min·Throgs Neck Bridge
18
Continue on I 295
0.7 mi·1 min·Throgs Neck Expressway
Use the straight / slight right lanes.
19
Keep slight left at fork onto I 295
6.6 mi·8 min·Cross Bronx Expressway
Use the straight / slight right lanes.
20
Keep slight left at fork onto I 95; US 1
0.7 mi·1 min·Trans-Manhattan Expressway
Toward Upper Level
21
Continue on I 95; US 1
0.6 mi·59 sec·George Washington Bridge (upper level)
22
Continue on I 95 EXPR; US 1 EXPR; US 9 EXPR
0.5 mi·48 sec·I 95 EXPR; US 1 EXPR; US 9 EXPR
23
Keep slight left at fork onto I 95 EXPR; US 1 EXPR; US 9 EXPR
0.6 mi·39 sec·I 95 EXPR; US 1 EXPR; US 9 EXPR
Use the straight / slight right lanes.
24
Keep slight left at fork onto I 95 EXPR; NJTP
0.1 mi·8 sec·I 95 EXPR; NJTP
25
Take the exit
0.2 mi·22 sec
Toward I 95 South, NJTP South: HackensackUse the straight / slight right lanes.
26
Keep slight right at fork
0.2 mi·23 sec
Exit 72AToward NJ 4 West: ParamusUse the slight left / slight right lanes.
27
Merge onto NJ 4
6.7 mi·9 min·NJ 4
Use the slight right lane.
28
Take the exit
0.2 mi·26 sec
Toward GSP South, NJ 17 South, GSP North, NJ 17 North: Grand State Plaza, Newark, MahwahUse the straight lane.
29
Keep slight right at fork
0.2 mi·36 sec
Toward NJ 17 North: MahwahUse the straight / slight right lanes.
30
Merge onto NJ 17
3.3 mi·4 min·NJ 17
Use the straight / slight right lanes.
31
Continue on NJ 17
7.3 mi·9 min·NJ 17
Use the straight / right lanes.
32
Continue on NJ 17
0.7 mi·50 sec·NJ 17
33
Continue on NJ 17
3.3 mi·4 min·NJ 17
34
Continue on I 287; NY 17
0.2 mi·10 sec·I 287; NY 17
35
Keep slight left at fork onto NY 17
118 mi·2 hr 15 min·NY 17
Toward I 87 North, NY 17 North, New York State Thruway North: AlbanyUse the straight / slight right lanes.
36
Keep slight left at fork onto I 90
114 mi·2 hr 11 min·New York State Thruway
Toward I 90 West: Buffalo
37
Take the exit
0.8 mi·1 min
Exit 34Toward NY 13: Canastota, ChittenangoUse the slight right lane.
38
Continue on this road
350 ft·11 sec·this road
39
Turn left onto NY 13
1.3 mi·3 min·North Peterboro Street
40
Turn right onto NY 5; NY 13
2.7 mi·4 min·Seneca Turnpike
Use the straight lane.
41
Continue on NY 5; NY 13
2.2 mi·3 min·State Route 5
42
Turn right onto Canaseraga Road
63 ft·2 sec·Canaseraga Road
43
Arrive at destination
Canaseraga Road
Trip Plan
Morning Departure
Start early — leave by 6-7 AM to arrive at a reasonable hour.
Evening Departure
This is a long drive — plan for a morning departure or consider splitting it into two days.
You can normally do this drive in one day.
Plan roughly 1 meaningful break for fuel, food, and rest.
The halfway point lands around 154.9 miles from Smithtown, NY, or about 3h 15m into the drive.
The longest continuous stretch on this route runs about 117.5 miles.
This is a comfortable same-day trip.
Departure
Before you leave
Start with fuel, water, and navigation already sorted so the first hour feels easy.
First stop
Around 68 miles or 1h 35m in
Use this first pause for coffee, a restroom break, and a quick traffic check ahead.
Halfway reset
Around 154.9 miles or 3h 15m in
This is the best place for your longest stop, a real meal, and a full fuel check.
Final approach
Final hour starts around 5h 10m
Traffic, exits, and arrival timing usually matter more near Sullivan, NY than in the middle of the route.
Before You Leave
+
Open the route before leaving Smithtown, NY so your first major turns are already loaded.
+
Leave with enough water and a charging cable within reach, not packed away.
+
Check your fuel range against the first long segment, especially if you are starting outside city service areas.
Day 1
Settle into the route from Smithtown, NY
This is one driving day of about 309.7 miles and 6h 18m.
Your first comfortable stop window is around 68 miles from Smithtown, NY.
This route can stay practical as a one-day drive if traffic stays reasonable.
Plan about 1 real break rather than only quick fuel stops.
The longest stretch is on NY 17 for about 117.5 miles.
Where to Stop
Rest stops, refuel points, and overnight suggestions along this route.
Halfway Point
Midpoint
About 154.9 mi from Smithtown, NY
· 3h 15m into the drive
The midpoint is around 154.9 miles from Smithtown, NY, which is a good place for a longer meal and fuel stop.
Before the longest stretch
Fuel check
Top up before NY 17 if your tank is already low. That segment runs about 117.5 miles.
Arriving in Sullivan, NY
The final approach into Sullivan, NY usually feels slower than the middle of the drive, so avoid planning your tightest schedule at the very end.
Try to arrive with enough fuel left to skip an immediate station stop unless you already know the area around Sullivan, NY.
After long uninterrupted mileage, take five minutes before the last urban segment to reset and refocus on exits, merges, and city traffic.
These stop ideas are pacing suggestions — the exact town or exit can change with traffic, hotel plans, and fuel range.
National Parks Near This Route
Worth a detour if your schedule allows.
Fort Stanwix National Monument
National Monument
For centuries, the Oneida Carrying Place, a six-mile portage connecting the Mohawk River and Wood Creek, served as a vital link for those traveling by water from the ocean to the Great Lakes. When Eur...
5 mi from route
~13 min detour
Free
near mile 288.4
Merchant’s clerk, Revolutionary War soldier, first Secretary Treasury of the United States: Alexander Hamilton’s life is memorialized at The Grange, the home he built on a country estate in uptown Man...
5 mi from route
~12 min detour
Free
near mile 42.7
The final resting place of President Ulysses S. Grant and his wife, Julia, is the largest mausoleum in North America. It testifies to a people’s gratitude for the man who ended the bloodiest conflict...
6 mi from route
~14 min detour
Free
near mile 42.7
Before the 1960s, almost everything about living authentically as a lesbian, a bisexual person or a gay man was illegal. The Stonewall Uprising on June 28, 1969 is a milestone in the quest for civil r...
10 mi from route
~25 min detour
Free
near mile 42.7
The African Burial Ground stands as the oldest and largest known excavated burial site in North America for both free and enslaved Africans. It offers a profound testament to the enduring legacy of Af...
11 mi from route
~28 min detour
Free
near mile 42.7
Located at the southern tip of Manhattan, Castle Clinton marks the place where New York City began and reflects the growth of both the city and the nation. Built to defend the harbor during the War of...
12 mi from route
~30 min detour
Free
near mile 42.7
Park data from the National Park Service API. Alerts update every 2 hours.
Fuel & Cost
Regular Gas
$50.98 one way
$101.96 round trip
$4.18/gal25.4 MPG avg108 kg CO2
Fuel Type
$/gal
One Way
Round Trip
midgrade
$4.52
$55.12
$110.25
premium
$4.92
$60.03
$120.05
diesel
$5.61
$68.38
$136.76
Estimated Tolls: $28.71
George Washington Bridge
$16.00
Throgs Neck Bridge
$6.55
New York State Thruway
(113.7 mi)$5.69
Jericho Turnpike
(4 mi)$0.28
Seneca Turnpike
(2.7 mi)$0.19
Toll estimates based on average 2024-2025 rates. EZ-Pass/SunPass discounts may lower the actual cost.
Estimated Trip Cost (one way, 1 person)
Fuel
$51
Tolls
$29
Meals
$25–$50
Total
$105–$130
Rough estimate based on US averages. Hotel $80–$140/night, meals $25–$50/day.
Estimated CO2 emission: 108.4 kg one way.
Prices: EIA weekly data, 2026-04-13.
Driving Electric?
About $33 in charging
· 1 stop
· 67% less CO2
Vehicle Type
kWh
Stops
DC Fast
Home Charge
Average EV
92.9
1
$32.52
$14.87
Efficient EV
77.4
0
$27.10
$12.39
EV Truck/SUV
123.9
1
$43.36
$19.82
Gas CO2
108 kg
EV CO2
36 kg (67% less)
Plan for 1 charging stop. A 30-minute DC fast charge mid-route should be enough to complete the trip comfortably.
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 16, 2026
Origin
Smithtown, NY
Late night
in Smithtown on Friday
Local time
12:47 AM
EDT
Current temp
64°F
Unavailable
Live forecast
Destination
Sullivan, NY
Late night
in Sullivan on Friday
Local time
12:47 AM
EDT
Current temp
49°F
Unavailable
Live forecast
57°F
Ramapo, NY
155 mi in
Seasonal Notes
Summer travel usually means heavier construction, hotter rest stops, and busier weekend traffic around major cities.
Winter travel shortens daylight, so a route that looks manageable on paper can feel much longer after dark.
Holiday weekends tend to make both departure and arrival windows slower than the raw route time suggests.
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
15 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
6h 18m on the road
Start early — leave by 6-7 AM to arrive at a reasonable hour.
Weather data from the National Weather Service. Conditions may change; check closer to your travel date.
Frequently Asked Questions
The drive from Smithtown, NY to Sullivan, NY covers 309.7 miles and takes about 6h 18m without stops. Add 15-30 minutes for a fuel or rest stop on longer drives.
The main roads are NY 17, New York State Thruway, Long Island Expressway. Most of the drive stays on highways, so watch for ramps and exits.
This is a comfortable same-day trip.
The midpoint is about 154.9 miles from Smithtown, NY. Look for rest areas, gas stations, or food options near the halfway mark.
At current regular gas prices, expect to spend about $50.98 one way. This estimate uses 25.4 MPG — your actual cost will vary with your vehicle's fuel efficiency and current gas prices.
Start early — leave by 6-7 AM to arrive at a reasonable hour. This is a long drive — plan for a morning departure or consider splitting it into two days.
Plan about 1 meaningful break for fuel, food, or rest. Plan on a short reset every 3 to 4 hours to stay fresh behind the wheel.
This is a demanding drive. With 28 significant decision points across 309.7 miles, you will need to stay alert - especially through interchange areas and urban stretches. Consider splitting it into segments if you are not comfortable with fast highway navigation.
The main spots that need attention: at 7.6 miles: Highway fork - watch signs carefully. Lane positioning matters here; at 33.3 miles: Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one; at 33.5 miles: Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one.
Between Smithtown, NY and Sullivan, NY, road signs point toward Kennedy Airport, Cross Island Parkway North, Bronx, New England, Upper Level and Njtp South: Hackensack - among others.
Yes. Nearby national parks include Fort Stanwix National Monument, Hamilton Grange National Memorial and General Grant National Memorial. There are 6 parks within detour distance of this route.
