The drive from Islip, NY to Thiells, NY covers 77.1 miles and takes about 1h 49m behind the wheel.
This route is realistic as a one-day drive if you keep your stops efficient.
The route leans on Palisades Interstate Parkway, Southern State Parkway, Cross Bronx Expressway for much of the mileage,
and the overall profile is highway-focused drive.
The longest uninterrupted segment is about 25.6 miles on Palisades Interstate Parkway.
At current regular gas prices, budget about $12.69 one way before food or hotel costs.
Trip Pace
Same-day drive is realistic
A same-day return is realistic if you keep stops short.
Midpoint
38.5 miles from Islip, NY
A natural place for your longest stop of the day
, about 54m into the drive
.
Islip (pronounced "ICE-lip") is a town on Long Island in the state of New York. Located within Suffolk County, the Town of Islip includes the villages of Brightwaters, Islandia, Ocean Beach and Saltaire. It also includes numerous hamlets including Bay Shore and Sayville which are ferry terminals for Fire Island. Other prominent communities are Bayport, Brentwood, Central Islip, Hauppauge, Islip village (the town seat), and Ronkonkoma.
Top landmarks
•Bayport Aerodrome — airport in Suffolk County, New York, United States
•Connetquot River State Park Preserve — state park in New York
•Modesty — oyster-dredging sloop built in Long Island
Doable as a same-day drive at 1h 49m. Total distance: 77.1 miles.
Family Friendly
Moderate complexity with 0 natural rest stops along the way.
Solo Traveler
1h 49m drive, comfortable solo distance.
First-Time Driver
Mostly highway driving (84%). Some complex stretches to watch for.
Drive Character
This is a 1h 49m highway drive covering 77.1 miles, with most of the trip on Palisades Interstate Parkway and Southern State Parkway. The longest continuous stretch is about 25.6 miles on Palisades Interstate Parkway.
Most of the miles stay on highways, which makes pacing and fuel planning easier than turn-by-turn city driving.
There are about 35 navigation steps in the underlying route data, so the final approach matters more than the middle miles.
Palisades Interstate Parkway is the longest continuous segment at about 25.6 miles.
How Hard Is This Drive?
This is a straightforward highway drive that stays mostly on Palisades Interstate Parkway and Southern State Parkway. This route has several spots where lane changes, forks, or exits need your full attention. The trickiest moment comes around 3.6 miles in near CR 57 / Howells Road.
Driving Effort10/10
Demanding - stay alert through the decision-heavy sections
Balances navigation complexity with total wheel time.
This drive requires moderate attention. Across 77.1 miles you will encounter 21 spots where lane choice or exit timing matters. Not difficult for experienced highway drivers, but worth previewing the tricky sections before you go.
Where does it get tricky?
The main spots that need attention: at 3.6 miles (CR 57 / Howells Road): Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one; at 31.1 miles: Highway fork - watch signs carefully. Lane positioning matters here; at 31.2 miles: Highway fork - watch signs carefully. Lane positioning matters here.
Critical Maneuvers
5 of 21 key points
These are the spots where you need to pay the most attention. Preview them before you drive.
9
3.6 mi into trip|~6m in|CR 57 / Howells Road
Keep slight right at fork onto CR 57 / Howells Road toward Howells Road, Deer Park
Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one
Use the right lane.
Toward Howells Road, Deer Park
8
31.1 mi into trip|~43m in
Keep slight left at fork toward NY 24 West: Hempstead Avenue
Highway fork - watch signs carefully. Lane positioning matters here
Use the slight left / slight right lanes.
Toward NY 24 West: Hempstead Avenue
8
31.2 mi into trip|~43m in
Keep slight right at fork toward Hempstead Avenue West
Highway fork - watch signs carefully. Lane positioning matters here
Use the slight left / slight right lanes.
Toward Hempstead Avenue West
8
49.3 mi into trip|~1h 9m in|Palisades Interstate Parkway
Keep slight right at fork onto Palisades Interstate Parkway toward Palisades Parkway
Highway fork - watch signs carefully. Lane positioning matters here
Use the straight / slight right lanes.
Exit 74
Toward Palisades Parkway
8
74.9 mi into trip|~1h 43m in
Take the exit toward US 202, CR 47: Haverstraw, Suffern
Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one
Use the slight right lane.
Exit 13
Toward US 202, CR 47: Haverstraw, Suffern
Towns Mentioned on Route Signs
Based on OSRM destination-sign hints, not a full list of every settlement the road passes.
Between Islip, NY and Thiells, NY, road signs point toward So West: New York, Cross Island Parkway North, Hempstead Avenue West, Grandstand and Upper Level.
So West: New York
4.5 mi in|~8m
Cross Island Parkway North
29.4 mi in|~40m
Hempstead Avenue West
31.1 mi in|~43m
Grandstand
31.3 mi in|~43m
Upper Level
47.5 mi in|~1h 6m|via I 95; US 1
Main Roads
Road
Distance
Duration
Palisades Interstate Parkway
25.6 mi
33m
Southern State Parkway
24.7 mi
31m
Cross Bronx Expressway
6.6 mi
8m
Clearview Expressway
5 mi
5m
Thiells-Mount Ivy Road
2 mi
4m
Throgs Neck Bridge
2 mi
3m
Main Street
1.8 mi
3m
Cross Island Parkway
1.3 mi
1m
Longest stretch:
Palisades Interstate Parkway
— 25.6 mi, about 33m
Turn-by-Turn Driving Directions
Step-by-step road directions between Islip, NY and Thiells, NY.
1
Start on NY 27A
0.8 mi·1 min·Main Street
2
Continue on Montauk Highway
0.2 mi·19 sec·Montauk Highway
3
Continue on NY 27A
1.1 mi·1 min·Main Street
4
Turn right onto 3rd Avenue
0.6 mi·1 min·3rd Avenue
5
Continue on CR 57
0.3 mi·36 sec·Rossevelt Street
6
Continue on CR 57
0.7 mi·1 min·Howells Road
Use the left lane.
7
Turn straight onto Sunrise Highway
163 ft·3 sec·Sunrise Highway
8
Keep slight right at fork onto CR 57
0.3 mi·36 sec·Howells Road
Toward Howells Road, Deer ParkUse the right lane.
9
Continue on CR 57
0.6 mi·1 min·Bay Shore Road
10
Take the ramp
0.1 mi·19 sec
Toward SO West: New York
11
Continue on this road
363 ft·8 sec·this road
12
Merge onto SO
25 mi·31 min·Southern State Parkway
Use the straight / right lanes.
13
Take the exit
0.3 mi·43 sec
Toward Cross Island Parkway North, Whitestone BridgeUse the slight right lane.
14
Merge onto CI
1.3 mi·1 min·Cross Island Parkway
15
Take the exit
317 ft·9 sec
Exit 26BToward NY 24: UBS Arena-Belmont ParkUse the slight right lane.
16
Keep slight left at fork
437 ft·12 sec
Toward NY 24 West: Hempstead AvenueUse the slight left / slight right lanes.
17
Keep slight right at fork
0.1 mi·15 sec
Toward Cross Island Parkway North, Hempstead Avenue West
18
Keep slight right at fork
266 ft·8 sec
Toward Hempstead Avenue WestUse the slight left / slight right lanes.
19
Continue on this road
0.1 mi·13 sec·this road
Toward Grandstand, Hempstead Avenue West
20
Keep slight left at fork
100 ft·4 sec
Toward Hempstead Avenue
21
Turn right onto NY 24
1.0 mi·2 min·Hempstead Avenue
Use the right lane.
22
Turn left onto Jamaica Avenue
0.1 mi·17 sec·Jamaica Avenue
23
Turn right onto NY 24
0.7 mi·1 min·212th Street
24
Continue on I 295
5.0 mi·5 min·Clearview Expressway
Toward I 295 North: Clearview Expressway, Through Neck BridgeUse the straight / slight right lanes.
25
Continue on I 295
2.0 mi·3 min·Throgs Neck Bridge
26
Continue on I 295
0.7 mi·1 min·Throgs Neck Expressway
Use the straight / slight right lanes.
27
Keep slight left at fork onto I 295
6.6 mi·8 min·Cross Bronx Expressway
Use the straight / slight right lanes.
28
Keep slight left at fork onto I 95; US 1
0.7 mi·1 min·Trans-Manhattan Expressway
Toward Upper Level
29
Continue on I 95; US 1
0.6 mi·59 sec·George Washington Bridge (upper level)
30
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
31
Keep slight right at fork onto Palisades Interstate Parkway
26 mi·33 min·Palisades Interstate Parkway
Exit 74Toward Palisades ParkwayUse the straight / slight right lanes.
32
Take the exit
0.1 mi·16 sec
Exit 13Toward US 202, CR 47: Haverstraw, SuffernUse the slight right lane.
33
Keep slight left at fork
139 ft·10 sec
Exit 13Toward US 202, CR 47: Haverstraw, Suffern
34
Turn left onto CR 47
2.0 mi·4 min·Thiells-Mount Ivy Road
35
Arrive at destination
CR 47
Trip Plan
Morning Departure
Leave by 9 AM and you'll arrive before lunch.
Evening Departure
Even a 4 PM departure gets you there before dark in summer.
You can normally do this drive in one day.
You may only need one short stretch break if traffic stays light.
The halfway point lands around 38.5 miles from Islip, NY, or about 54m into the drive.
The longest continuous stretch on this route runs about 25.6 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 17 miles or 24m in
Use this first pause for coffee, a restroom break, and a quick traffic check ahead.
Halfway reset
Around 38.5 miles or 54m in
This is the best place for your longest stop, a real meal, and a full fuel check.
Final approach
Final hour starts around 1h 31m
Traffic, exits, and arrival timing usually matter more near Thiells, NY than in the middle of the route.
Before You Leave
+
Open the route before leaving Islip, NY so your first major turns are already loaded.
Day 1
Settle into the route from Islip, NY
This is one driving day of about 77.1 miles and 1h 49m.
Your first comfortable stop window is around 17 miles from Islip, NY.
This route can stay practical as a one-day drive if traffic stays reasonable.
The longest stretch is on Palisades Interstate Parkway for about 25.6 miles.
Where to Stop
Rest stops, refuel points, and overnight suggestions along this route.
The midpoint is around 38.5 miles from Islip, NY, which is a good place for a longer meal and fuel stop.
Arriving in Thiells, NY
The final approach into Thiells, NY usually feels slower than the middle of the drive, so avoid planning your tightest schedule at the very end.
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.
Hamilton Grange National Memorial
National Memorial
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...
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...
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...
9 mi from route
~21 min detour
Free
near mile 47.8
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...
10 mi from route
~25 min detour
Free
near mile 47.8
Here at Federal Hall, George Washington took the oath of office as the first President of the United States, marking the beginning of the American constitutional republic. This historic site served as...
10 mi from route
~26 min detour
Free
near mile 47.8
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...
11 mi from route
~27 min detour
Free
near mile 47.8
Park data from the National Park Service API. Alerts update every 2 hours.
Fuel & Cost
Regular Gas
$12.69 one way
$25.38 round trip
$4.18/gal25.4 MPG avg27 kg CO2
Fuel Type
$/gal
One Way
Round Trip
midgrade
$4.52
$13.72
$27.45
premium
$4.92
$14.94
$29.89
diesel
$5.61
$17.02
$34.05
Estimated Tolls: $22.55
George Washington Bridge
$16.00
Throgs Neck Bridge
$6.55
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
$13
Tolls
$23
Meals
$25–$50
Total
$60–$85
Rough estimate based on US averages. Hotel $80–$140/night, meals $25–$50/day.
Estimated CO2 emission: 27 kg one way.
Prices: EIA weekly data, 2026-04-13.
Driving Electric?
About $8 in charging
· 0 stops
· 67% less CO2
Vehicle Type
kWh
Stops
DC Fast
Home Charge
Average EV
23.1
0
$8.10
$3.70
Efficient EV
19.3
0
$6.75
$3.08
EV Truck/SUV
30.8
0
$10.79
$4.93
Gas CO2
27 kg
EV CO2
9 kg (67% 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 18, 2026
Origin
Islip, NY
Late night
in Islip on Saturday
Local time
3:55 AM
EDT
Current temp
50°F
Scattered Rain Showers then Partly Cloudy
NE 6 mph33% chanceLive forecast
Destination
Thiells, NY
Late night
in Thiells on Saturday
Local time
3:55 AM
EDT
Current temp
66°F
Unavailable
Live forecast
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
16 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
1h 49m 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.
Frequently Asked Questions
The drive from Islip, NY to Thiells, NY covers 77.1 miles and takes about 1h 49m without stops. Add 15-30 minutes for a fuel or rest stop on longer drives.
The main roads are Palisades Interstate Parkway, Southern State Parkway, Cross Bronx 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 38.5 miles from Islip, NY. Look for rest areas, gas stations, or food options near the halfway mark.
At current regular gas prices, expect to spend about $12.69 one way. This estimate uses 25.4 MPG — your actual cost will vary with your vehicle's fuel efficiency and current gas prices.
Leave by 9 AM and you'll arrive before lunch. Even a 4 PM departure gets you there before dark in summer.
This drive requires moderate attention. Across 77.1 miles you will encounter 21 spots where lane choice or exit timing matters. Not difficult for experienced highway drivers, but worth previewing the tricky sections before you go.
The main spots that need attention: at 3.6 miles (CR 57 / Howells Road): Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one; at 31.1 miles: Highway fork - watch signs carefully. Lane positioning matters here; at 31.2 miles: Highway fork - watch signs carefully. Lane positioning matters here.
Between Islip, NY and Thiells, NY, road signs point toward So West: New York, Cross Island Parkway North, Hempstead Avenue West, Grandstand and Upper Level.
How this page is built
Compiled by the Trip.ovh planning team at COD Solutions Oy from open government datasets — OSRM over OpenStreetMap for geometry, EIA for fuel prices, and NPS for national parks. See our methodology for refresh cadence and limitations.
