The drive from De Peyster, NY to Islip, NY covers 398.8 miles and takes about 8h 22m behind the wheel.
It usually feels better as a 2-day road trip than as one long push.
The route leans on New York State Thruway, Southern State Parkway, State Highway 12 for much of the mileage,
and the overall profile is turn-heavy local drive.
The longest uninterrupted segment is about 201.9 miles on New York State Thruway.
At current regular gas prices, budget about $65.64 one way before food or hotel costs.
Trip Pace
Best split across 2 days
Treat the return leg as its own travel day rather than an afterthought.
Break Rhythm
2 planned breaks
Plan on a short reset every 3 to 4 hours to stay fresh behind the wheel.
Midpoint
199.4 miles from De Peyster, NY
A natural place for your longest stop of the day
, about 4h 14m 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
Turn-heavy local drive route profile with national parks nearby.
Drive Character
Expect a 8h 22m drive with frequent turns across 398.8 miles of local and secondary roads.
This route has more turning and local-road decision points than a simple highway run.
There are about 71 navigation steps in the underlying route data, so the final approach matters more than the middle miles.
New York State Thruway is the longest continuous segment at about 201.9 miles.
How Hard Is This Drive?
Expect a hands-on drive with frequent turns and local roads rather than long highway stretches. This route has several spots where lane changes, forks, or exits need your full attention. The trickiest moment comes around 207.4 miles in near New York State Thruway.
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 39 significant decision points across 398.8 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 207.4 miles (New York State Thruway): Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one; at 325.6 miles (NY 17): Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one; at 327 miles (NJ 17): Highway fork - watch signs carefully. Lane positioning matters here.
Critical Maneuvers
5 of 39 key points
These are the spots where you need to pay the most attention. Preview them before you drive.
8
207.4 mi into trip|~4h 23m in|New York State Thruway
Keep slight right at fork onto New York State Thruway toward I 87 South: New York, Boston
Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one
Use the slight right lane.
Toward I 87 South: New York, Boston
9
325.6 mi into trip|~6h 40m in|NY 17
Keep slight right at fork onto NY 17 toward I 287 South, NJ 17 South: New Jersey
Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one
Use the slight right lane.
Exit 15
Toward I 287 South, NJ 17 South: New Jersey
8
327 mi into trip|~6h 41m in|NJ 17
Keep slight left at fork onto NJ 17 toward NJ 17 South: Mahwah
Highway fork - watch signs carefully. Lane positioning matters here
Use the slight left / straight lanes.
Exit 66
Toward NJ 17 South: Mahwah
8
356 mi into trip|~7h 21m in|I 295 / Cross Bronx Expressway
Keep slight right at fork onto I 295 / Cross Bronx Expressway toward I 295 South: Throgs Neck Bridge
Highway fork - watch signs carefully. Lane positioning matters here
Use the straight / slight left lanes.
Exit 6B
Toward I 295 South: Throgs Neck Bridge
9
394.2 mi into trip|~8h 13m in
Take the exit toward Bay Shore Road South, Bay Shore
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 41S
Toward Bay Shore Road South, Bay Shore
Towns Mentioned on Route Signs
Based on OSRM destination-sign hints, not a full list of every settlement the road passes.
Between De Peyster, NY and Islip, NY, road signs point toward Genesee Street South, Boston, Gsp South: Paterson, Fort Lee, New York and Cross Island Parkway South - among others.
Genesee Street South
122.5 mi in|~2h 44m
Boston
207.4 mi in|~4h 23m|via New York State Thruway
Gsp South: Paterson
341 mi in|~7h
Fort Lee
341 mi in|~7h
New York
341 mi in|~7h
Cross Island Parkway South
367.4 mi in|~7h 38m
Southern State Parkway East
369 mi in|~7h 40m
Eastern Long Island
369 mi in|~7h 40m
Main Roads
Road
Distance
Duration
New York State Thruway
201.9 mi
3h 53m
Southern State Parkway
24.7 mi
31m
State Highway 12
22.8 mi
31m
Bea Luck Road
19.6 mi
23m
State Highway 812
19.2 mi
23m
Indian River Road
16.1 mi
19m
NJ 17
14.1 mi
18m
US 11
11.5 mi
13m
Longest stretch:
New York State Thruway
— 201.9 mi, about 3h 53m
Turn-by-Turn Driving Directions
Step-by-step road directions between De Peyster, NY and Islip, NY.
1
Start on Plimpton Road
26 ft·1 sec·Plimpton Road
2
Turn right onto CR 10
1.1 mi·2 min·County Highway 10
3
Turn left onto CR 45
1.9 mi·4 min·County Highway 45
4
At end of road, turn left onto CR 17
1.0 mi·2 min·County Highway 17
5
Continue on CR 17
0.4 mi·54 sec·Dekalb-de Peyster Road
6
Continue on CR 17
3.3 mi·8 min·County Road 17
7
At end of road, turn right onto NY 812
2.6 mi·2 min·State Highway 812
8
At end of road, turn right onto US 11; NY 812
11 mi·13 min·US 11; NY 812
9
Turn left onto NY 58; NY 812
0.6 mi·40 sec·William Street
10
Continue on NY 58; NY 812
5.5 mi·6 min·State Highway 58
11
Turn right onto NY 812
2.1 mi·2 min·Balmat-Fowler Road
12
Continue on NY 812
7.9 mi·9 min·State Highway 812
13
At end of road, turn right onto NY 3; NY 812
0.3 mi·33 sec·State Highway 812
14
Continue on NY 3; NY 812
0.4 mi·59 sec·State Street
15
Continue on NY 3; NY 812
0.8 mi·1 min·Main Street
16
Continue on NY 3; NY 812
2.9 mi·4 min·State Route 3
17
Turn left onto NY 812
5.7 mi·6 min·Indian River Road
18
Continue on NY 812
10 mi·12 min·Indian River Road
19
Continue on NY 812
0.8 mi·1 min·Main Street
20
Continue on NY 812
8.4 mi·10 min·State Highway 812
21
Turn left onto East State Street
1.5 mi·3 min·East State Street
22
Continue on Ross Road
0.5 mi·1 min·Ross Road
23
Turn left onto NY 12
20 mi·23 min·Bea Luck Road
24
Continue on NY 12
0.8 mi·51 sec·State Highway 12
25
Continue on NY 12
9.7 mi·11 min·Erwin Parkway
26
Continue on NY 12
22 mi·30 min·State Highway 12
27
Take the exit
0.3 mi·38 sec
28
Merge onto NY 49
0.4 mi·26 sec·State Route 49
29
Continue on I 790; NY 5
0.2 mi·13 sec·I 790; NY 5
30
Take the exit
0.2 mi·18 sec
Toward Genesee Street South
31
Keep slight left at fork
0.7 mi·1 min
Toward I 90
32
Keep slight right at fork
0.3 mi·43 sec
Toward I 90 East
33
Merge onto I 90
84 mi·1 hr 36 min·New York State Thruway
34
Keep slight right at fork onto New York State Thruway
118 mi·2 hr 16 min·New York State Thruway
Toward I 87 South: New York, BostonUse the slight right lane.
35
Keep slight right at fork onto NY 17
0.9 mi·59 sec·NY 17
Exit 15Toward I 287 South, NJ 17 South: New JerseyUse the slight right lane.
36
Continue on I 287; NJ 17
0.5 mi·39 sec·I 287; NJ 17
37
Keep slight left at fork onto NJ 17
14 mi·18 min·NJ 17
Exit 66Toward NJ 17 South: MahwahUse the slight left / straight lanes.
38
Take the exit
0.1 mi·19 sec
Toward NJ 4, GSP South: Paterson, Fort Lee, New York
39
Keep slight left at fork
0.5 mi·1 min
Toward NJ 4 East: Fort Lee, New York
40
Merge onto NJ 4
0.3 mi·24 sec·NJ 4
Use the right lane.
41
Continue on NJ 4
6.4 mi·8 min·NJ 4
Use the straight / slight right lanes.
42
Take the exit
0.2 mi·18 sec
Toward I 95 North: George Washington BridgeUse the straight / slight left lanes.
43
Merge onto I 95 EXPR
0.7 mi·54 sec·I 95 EXPR
Use the straight / slight right lanes.
44
Keep slight left at fork onto I 95 EXPR
0.8 mi·1 min·I 95 EXPR
45
Continue on I 95; US 1; US 9
0.6 mi·1 min·George Washington Bridge (upper level)
Use the straight / slight right lanes.
46
Continue on I 95; US 1
0.7 mi·1 min·Trans-Manhattan Expressway
47
Continue on I 95; US 1
4.7 mi·6 min·Cross Bronx Expressway
Use the straight / slight right lanes.
48
Keep slight right at fork onto I 295
2.0 mi·2 min·Cross Bronx Expressway
Exit 6BToward I 295 South: Throgs Neck BridgeUse the straight / slight left lanes.
49
Merge onto I 295
0.6 mi·58 sec·Throgs Neck Expressway
50
Continue on I 295
2.0 mi·3 min·Throgs Neck Bridge
Use the straight / slight right lanes.
51
Continue on I 295
5.0 mi·5 min·Clearview Expressway
Use the straight / slight right lanes.
52
Continue on NY 24
0.7 mi·1 min·Hollis Court Boulevard
Use the straight lane.
53
At end of road, turn left onto NY 24
0.2 mi·35 sec·Jamaica Avenue
Use the left lane.
54
Turn right onto Hempstead Avenue
0.9 mi·2 min·Hempstead Avenue
55
Turn right onto 225th Street
228 ft·9 sec·225th Street
Use the right lane.
56
Take the ramp
0.2 mi·28 sec
Toward Cross Island Parkway South, Verrazano Bridge
57
Merge onto CI
1.3 mi·1 min·Cross Island Parkway
Use the straight / slight right lanes.
58
Take the exit
0.5 mi·1 min
Exit 25AToward Southern State Parkway East, Eastern Long IslandUse the slight left / straight lanes.
59
Merge onto SO
25 mi·31 min·Southern State Parkway
Use the straight / slight right lanes.
60
Keep slight left at fork onto SO
0.2 mi·16 sec·Southern State Parkway
Use the straight / slight right lanes.
61
Take the exit
0.2 mi·31 sec
Exit 41SToward Bay Shore Road South, Bay ShoreUse the slight right lane.
62
Turn straight onto CR 57
0.5 mi·1 min·Bay Shore Road
63
Continue on CR 57
0.3 mi·43 sec·Howells Road
64
Turn straight onto CR 57
341 ft·6 sec·Sunrise Highway
65
Keep slight right at fork onto CR 57
0.6 mi·1 min·Howells Road
Toward Howells Road SouthUse the right lane.
66
Continue on CR 57
0.2 mi·24 sec·Roosevelt Street
67
Continue on CR 57
0.7 mi·1 min·3rd Avenue
68
At end of road, turn left onto NY 27A
1.1 mi·1 min·East Main Street
69
Continue on Montauk Highway
0.2 mi·17 sec·Montauk Highway
70
Continue on NY 27A
0.8 mi·1 min·Main Street
71
Arrive at destination
NY 27A
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.
This drive is better paced as a 2-day trip.
Plan roughly 2 meaningful breaks for fuel, food, and rest.
The halfway point lands around 199.4 miles from De Peyster, NY, or about 4h 14m into the drive.
The longest continuous stretch on this route runs about 201.9 miles.
Consider an overnight stop or starting very early.
Departure
Before you leave
Start with fuel, water, and navigation already sorted so the first hour feels easy.
First stop
Around 88 miles or 1h 59m in
Use this first pause for coffee, a restroom break, and a quick traffic check ahead.
Halfway reset
Around 199.4 miles or 4h 14m in
This is the best place for your longest stop, a real meal, and a full fuel check.
Overnight split
Day 1 wrap after about 199.4 miles or 4h 14m
Stop before fatigue turns the last few hours into a grind. You want day two to start fresh, not just resumed.
Final approach
Final hour starts around 6h 57m
Traffic, exits, and arrival timing usually matter more near Islip, NY than in the middle of the route.
Before You Leave
+
Open the route before leaving De Peyster, 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.
+
Pick one backup stop option before the midpoint in case traffic changes your pacing.
+
Treat this as a 2-day road trip and book the overnight stop before the busiest arrival window.
Day 1
Settle into the route from De Peyster, NY
Aim for roughly 199 miles and 4.2 hours of wheel time on this day.
Day 2
Finish the approach into Islip, NY
Aim for roughly 199 miles and 4.2 hours of wheel time on this day.
Your first comfortable stop window is around 88 miles from De Peyster, NY.
This route usually feels better as a 2-day drive than as one long push.
Plan about 2 real breaks rather than only quick fuel stops.
The longest stretch is on New York State Thruway for about 201.9 miles.
Where to Stop
Rest stops, refuel points, and overnight suggestions along this route.
Halfway Point
Midpoint
About 199.4 mi from De Peyster, NY
· 4h 14m into the drive
Place data sourced from public business listings. Hours and availability may vary.
National Parks Near This Route
Worth a detour if your schedule allows.
General Grant National Memorial
National Memorial
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...
7 mi from route
~18 min detour
Free
near mile 343.8
Caution: Lower Crypt Access Subject to Safe Conditions
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...
7 mi from route
~17 min detour
Free
near mile 357.5
Immerse yourself in an enchanting collage of coastal life and history. Rhythmic waves, high dunes, ancient maritime forests, historic landmarks and glimpses of wildlife, Fire Island has been a special...
11 mi from route
~28 min detour
Free
near mile 398.8
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...
11 mi from route
~28 min detour
Free
near mile 357.5
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...
12 mi from route
~31 min detour
Free
near mile 357.5
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...
13 mi from route
~33 min detour
Free
near mile 357.5
Station data from NREL Alternative Fuel Stations database.
Driving Electric?
About $42 in charging
· 1 stop
· 66% less CO2
Vehicle Type
kWh
Stops
DC Fast
Home Charge
Average EV
119.6
1
$41.87
$19.14
Efficient EV
99.7
1
$34.89
$15.95
EV Truck/SUV
159.5
1
$55.83
$25.52
Gas CO2
140 kg
EV CO2
47 kg (66% 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 14, 2026
Origin
De Peyster, NY
Morning
in De Peyster on Saturday
Local time
7:18 AM
EDT
Current temp
26°F
Unavailable
Live forecast
Destination
Islip, NY
Morning
in Islip on Saturday
Local time
7:18 AM
EDT
Current temp
44°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.
For long drives, weather on day two can matter just as much as conditions at departure, so check the whole travel window rather than only the first day.
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
18 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
8h 22m on the road
This is long enough that the arrival forecast matters almost as much as departure conditions. Recheck both ends before you roll.
Weather data from the National Weather Service. Conditions may change; check closer to your travel date.
Frequently Asked Questions
The drive from De Peyster, NY to Islip, NY covers 398.8 miles and takes about 8h 22m without stops. Add 15-30 minutes for a fuel or rest stop on longer drives.
The main roads are New York State Thruway, Southern State Parkway, State Highway 12. Expect a mix of highway and local road driving.
Consider an overnight stop or starting very early.
Yes. This route is usually more comfortable as a 2-day drive. A sensible stopping point is after roughly 199 miles on day one.
The midpoint is about 199.4 miles from De Peyster, NY. Look for rest areas, gas stations, or food options near the halfway mark.
At current regular gas prices, expect to spend about $65.64 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 2 meaningful breaks 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 39 significant decision points across 398.8 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 207.4 miles (New York State Thruway): Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one; at 325.6 miles (NY 17): Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one; at 327 miles (NJ 17): Highway fork - watch signs carefully. Lane positioning matters here.
Between De Peyster, NY and Islip, NY, road signs point toward Genesee Street South, Boston, Gsp South: Paterson, Fort Lee, New York and Cross Island Parkway South - among others.
Yes. Nearby national parks include General Grant National Memorial, Hamilton Grange National Memorial and Fire Island National Seashore. There are 6 parks within detour distance of this route.
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, NREL for EV charging, and NPS for national parks. See our methodology for refresh cadence and limitations.
